May Draft #2 -- POSTSCRIPT

[Nathaniel Borenstein <[e-mail]>]

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%%Title: stdin (ditroff)
%%CreationDate: Tue May 21 22:09:22 1991
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3313(notably)X
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2807(Well,)X
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3435(:-\))X
3598(--)X
3686(Nathaniel)X

3 p
%%Page: 3 3
12 s 0 xH 0 xS 1 f
2368 400(-)N
2424(3)X
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16 s
1596 720(M)N
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720 976(There)N
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2647(consolidated)X
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3973(types)X
720 1872(such)N
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2499(SGML)X
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3332(have)X
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3744(eliminated.)X
720 1984(DES-MESSAGE)N
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720 2096(worth)N
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1952 0.1875(text-plus/richmail,)AX
2752(binary,)X
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720 2208 0.2208(application/external-reference.)AN
1933(The)X
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720 2320(been)N
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2193(content-types,)X
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3391(liberal)X
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720 2432(The)N
895(text)X
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720 2544(explicit)N
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1545(\(e.g.)X
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3930(longer)X
720 2880(messages,)N
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1966(the)X
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720 2992(required.)N
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1210(new)X
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2950(a)X
3032(new)X
3231(concept)X
3570(of)X
3689(subtypes)X
4064(for)X
720 3104(multipart)N
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2550(elminated,)X
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3482(of)X
3646(Content-type:)X
720 3440(Message/charset)N
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1472(has)X
1646(been)X
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2242(to)X
2364(Content-TransferEncoding.)X
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3688(hexadecimal)X
720 3776(encoding)N
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720 3888(has)N
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1185(encoding)X
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1968(",")X
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2850(portable)X
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720 4336(The)N
894(quoted-printable)X
1555(encoding)X
1932(has)X
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2429("&")X
2606(and)X
2769("\\")X
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2998("=")X
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3319(":")X
3449(for)X
3586(portability,)X
4037(and)X
720 4448(has)N
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3214(and)X
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3931(and)X
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921(new)X
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1447(header)X
1730(\256elds,)X
1988(Content-ID)X
2452(and)X
2617(Content-Description,)X
3453(have)X
3661(been)X
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720 4896(Content-Size)N
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1399(been)X
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1692("RFC-XXXX-compliant")X
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3420(de\256ning)X
3773(a)X
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720 5232(subset)N
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720 5456(The)N
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3647(experts.)X

4 p
%%Page: 4 4
12 s 0 xH 0 xS 1 f
2368 400(-)N
2424(4)X
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720 800(Network)N
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16 s
1332 1168(M)N
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2013(for)X
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3000(Describing)X
1448 1312(the)N
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2040(of)X
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2725(essage)X
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2 f
12 s
1850 1712(Nathaniel)N
2254(Borenstein,)X
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3 f
14 s
600 2400(Status)N
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1395(emo)X
1 f
12 s
720 2640(This)N
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3215(a)X
3301(protocol)X
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3351(Nathaniel)X
3759(Borenstein)X
720 2864(<[e-mail]>)N
3 f
14 s
600 3104(Abstract)N
1 f
12 s
720 3344(This)N
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2252(the)X
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2800(message)X
3162(representation)X
3744(protocol)X
4101(to)X
720 3456(allow)N
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1419(textual)X
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3083(represented)X
3576(and)X
3764(exchanged)X
720 3568(without)N
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3864(934)X
4037(and)X
720 3680(RFC)N
925(1049,)X
1165(but)X
1312(extends)X
1630(and)X
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2084(that)X
2253(work.)X

5 p
%%Page: 5 5
12 s 0 xH 0 xS 1 f
2368 400(-)N
2424(5)X
2496(-)X
3 f
14 s
600 704(Table)N
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1023(Contents)X
1 f
12 s
720 944(1:)N
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1878(Field)X
720 1168(3:)N
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768 1280(3.1:)N
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768 1392(3.2:)N
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2303(Fields)X
768 1616(4.1:)N
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1324(Content-ID)X
1786(Header)X
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768 1728(4.2:)N
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1851(Header)X
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1934(and)X
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768 2176(5.2:)N
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768 2288(5.3:)N
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1613(Content-Type)X
2172(and)X
2335("RichMail")X
2801(subtype)X
768 2400(5.4:)N
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1137(Message)X
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768 2512(5.5:)N
963(The)X
1137(Binary)X
1423(Content-Type)X
768 2624(5.6:)N
963(The)X
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1616(Content-Type)X
2175(Value)X
768 2736(5.7:)N
963(The)X
1137(Audio,)X
1425(Image,)X
1714(and)X
1877(Video,)X
2160(and)X
2323(X-)X
2448(Content-Types)X
720 2848(6:)N
843(RFC-XXXX)X
1356(Compliance)X
720 2960(Appendix)N
1123(I)X
1179(--)X
1267(Guidelines)X
1708(For)X
1865(Sending)X
2204(Data)X
2410(Via)X
2573(Email)X
720 3072(Appendix)N
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1211(--)X
1299(Examples)X
768 3184(Example)N
1135(1:)X
1258(Simple)X
1555(Non-ASCII)X
2026(Text)X
2227(Example)X
768 3296(Example)N
1135(2:)X
1258(A)X
1351(Complex)X
1728(Multipart)X
2116(Example)X
720 3408(Summary)N
720 3520(Contacts)N
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720 3744(References)N

6 p
%%Page: 6 6
12 s 0 xH 0 xS 1 f
2368 400(-)N
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2496(-)X
3 f
14 s
720 704(1)N
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1 f
12 s
720 944(Since)N
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2335([RFC-822])X
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720 1056(textual)N
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3544(RFC)X
3750(822)X
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720 1168(has)N
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3426(the)X
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3919(and)X
4096(of)X
720 1280(SMTP)N
997(transport,)X
1390(as)X
1497(de\256ned)X
1806(by)X
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2305([RFC-821].)X
2800(As)X
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3076(format)X
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3710(wider)X
3955(use,)X
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720 1392(number)N
1038(of)X
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2604(problematic)X
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3225(the)X
3367(user)X
3551(community.)X
720 1616(RFC)N
955(822)X
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1356(intended)X
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1871(specify)X
2203(a)X
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2611(for)X
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3441(As)X
3601(such,)X
3855(non-text)X
720 1728(messages,)N
1140(such)X
1348(as)X
1460(multimedia)X
1932(messages)X
2327(that)X
2504(might)X
2761(include)X
3077(audio)X
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3435(images,)X
3764(are)X
3914(simply)X
720 1840(not)N
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1324(Even)X
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1981(of)X
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2280(however,)X
2660(RFC)X
2866(822)X
3035(is)X
3125(inadequate)X
3569(for)X
3707(the)X
3851(needs)X
4096(of)X
720 1952(email)N
978(users)X
1218(whose)X
1506(languages)X
1934(require)X
2250(the)X
2411(use)X
2582(of)X
2705(character)X
3101(sets)X
3287(richer)X
3554(than)X
3762(US)X
3926(ASCII)X
720 2064([REF-ANSI].)N
1286(For)X
1466(mail)X
1685(containing)X
2139(audio,)X
2424(video,)X
2709(Japanese)X
3098(text,)X
3315(or)X
3443(even)X
3673(text)X
3866(in)X
3989(most)X
720 2176(European)N
1113(languages,)X
1546(RFC)X
1751(822)X
1919(does)X
2119(not)X
2266(specify)X
2568(enough)X
2875(to)X
2974(permit)X
3250 0.1953(interoperability.)AX
720 2400(One)N
912(of)X
1024(the)X
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1937(of)X
2050(RFC)X
2264(821/822)X
2612(based)X
2864(mail)X
3069(systems)X
3406(is)X
3503(the)X
3654(fact)X
3832(that)X
4010(they)X
720 2512(limit)N
928(the)X
1071(contents)X
1417(of)X
1522(electronic)X
1928(mail)X
2124(messages)X
2511(to)X
2610(relatively)X
2999(short)X
3215(lines)X
3421(of)X
3525(seven-bit)X
3902(ASCII.)X
720 2624(This)N
920(forces)X
1184(a)X
1256(user)X
1445(to)X
1549(convert)X
1867(any)X
2035(non-textual)X
2503(data)X
2694(that)X
2869(she)X
3027(may)X
3223(wish)X
3434(to)X
3539(send)X
3745(into)X
3925(seven-)X
720 2736(bit)N
853(bytes)X
1087(representable)X
1632(as)X
1743(printable)X
2116(ASCII)X
2396(characters)X
2817(before)X
3093(invoking)X
3465(her)X
3618(local)X
3836(mail)X
4038(UA)X
720 2848(\(User)N
983(Agent)X
1268(program\).)X
1725(Examples)X
2156(of)X
2287(such)X
2514(encodings)X
2955(currently)X
3354(used)X
3581(in)X
3707(the)X
3876(Internet)X
720 2960(include)N
1036(pure)X
1238(hexadecimal,)X
1781(uuencode,)X
2205(the)X
2354(3-in-4)X
2620(base)X
2822(64)X
2949(scheme)X
3269(speci\256ed)X
3642(in)X
3748(RFC)X
3960(1113,)X
720 3072(the)N
862(Andrew)X
1195(Toolkit)X
1503(Representation,)X
2129(and)X
2292(many)X
2530(others.)X
720 3296(These)N
979(limitations)X
1421(become)X
1750(even)X
1961(more)X
2188(apparent)X
2549(as)X
2659(gateways)X
3047(are)X
3195(designed)X
3567(to)X
3672(allow)X
3916(for)X
4058(the)X
720 3408(exchange)N
1109(of)X
1214(mail)X
1411(messages)X
1798(between)X
2143(RFC)X
2348(822)X
2516(hosts)X
2737(and)X
2900(X.400)X
3161(hosts.)X
3430(X.400)X
3691([REF-X400])X
720 3520(speci\256es)N
1084(mechanisms)X
1593(for)X
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1889(inclusion)X
2275(of)X
2389(non-textual)X
2862(body)X
3088(parts)X
3309(within)X
3589(electronic)X
4004(mail)X
720 3632(messages.)N
1182(The)X
1383(current)X
1707(standards)X
2121(for)X
2284(the)X
2453(mapping)X
2841(of)X
2972(X.400)X
3260(messages)X
3674(to)X
3800(RFC)X
4032(822)X
720 3744(messages)N
1119(specify)X
1433(that)X
1614(either)X
1870(X.400)X
2143(non-textual)X
2618(body)X
2847(parts)X
3071(should)X
3364(be)X
3492(converted)X
3909(to)X
4021(\(not)X
720 3856(encoded)N
1076(in\))X
1218(an)X
1344(ASCII)X
1628(format,)X
1943(or)X
2057(that)X
2236(they)X
2436(should)X
2726(be)X
2851(discarded,)X
3278(notifying)X
3665(the)X
3817(RFC)X
4032(822)X
720 3968(user)N
909(that)X
1083(discarding)X
1514(has)X
1672(occurred.)X
2087(This)X
2288(is)X
2382(clearly)X
2675(undesirable,)X
3173(as)X
3283(information)X
3768(that)X
3943(a)X
4016(user)X
720 4080(may)N
923(wish)X
1141(to)X
1253(receive)X
1568(is)X
1668(lost.)X
1891(Even)X
2125(though)X
2428(a)X
2507(user's)X
2772(UA)X
2946(may)X
3148(not)X
3307(have)X
3525(the)X
3679(capability)X
4096(of)X
720 4192(dealing)N
1032(with)X
1231(the)X
1377(non-textual)X
1844(body)X
2064(part,)X
2266(the)X
2412(user)X
2600(might)X
2853(have)X
3063(some)X
3294(mechanism)X
3761(external)X
4101(to)X
720 4304(the)N
875(UA)X
1050(that)X
1232(can)X
1403(extract)X
1703(useful)X
1975(information)X
2467(from)X
2691(the)X
2846(body)X
3075(part.)X
3310(Moreover,)X
3750(it)X
3841(does)X
4053(not)X
720 4416(allow)N
973(for)X
1124(the)X
1281(fact)X
1465(that)X
1649(the)X
1806(message)X
2171(may)X
2376(eventually)X
2817(be)X
2947(gatewayed)X
3398(back)X
3619(into)X
3808(an)X
3939(X.400)X
720 4528(MHS,)N
975(where)X
1234(the)X
1376(non-textual)X
1839(information)X
2318(would)X
2582(de\256nitely)X
2970(become)X
3294(useful)X
3553(again.)X
720 4752(This)N
936(memo)X
1222(describes)X
1625(several)X
1943(mechanisms)X
2464(that)X
2654(combine)X
3031(to)X
3151(solve)X
3400(these)X
3644(problems.)X
4096(In)X
720 4864(particular,)N
1138(it)X
1216(describes:)X
720 5088(1.)N
847(A)X
947(Content-type)X
1481(header)X
1769(\256eld,)X
1995(generalized)X
2471(from)X
2690(RFC)X
2903(1049)X
3127([RFC-1049],)X
3652(which)X
3919(can)X
4085(be)X
720 5200(used)N
937(to)X
1053(describe)X
1415(the)X
1574(type)X
1781(and)X
1961(subtype)X
2301(of)X
2422(data)X
2624(in)X
2740(the)X
2899(body)X
3131(of)X
3251(a)X
3334(message)X
3700(and)X
3879(to)X
3994(fully)X
720 5312(specify)N
1022(the)X
1164(representation)X
1734(\(encoding\))X
2175(of)X
2279(such)X
2479(data.)X
720 5536(2.)N
842(A)X
937(Content-TransferEncoding)X
1995(header)X
2278(\256eld,)X
2499(which)X
2760(can)X
2920(be)X
3037(used)X
3239(to)X
3340(describe)X
3688(an)X
3806(auxilliary)X
720 5648(encoding)N
1119(that)X
1309(was)X
1503(applied)X
1832(to)X
1952(the)X
2115(data)X
2321(in)X
2441(order)X
2689(to)X
2809(allow)X
3068(it)X
3167(to)X
3287(pass)X
3497(through)X
3841(the)X
4004(mail)X
720 5760(transport)N
1086(layer.)X

7 p
%%Page: 7 7
12 s 0 xH 0 xS 1 f
2368 400(-)N
2424(7)X
2496(-)X
720 688(3.)N
856(A)X
965("text")X
1228(content-type)X
1751(value,)X
2025(which)X
2301(can)X
2476(be)X
2608(used)X
2825(to)X
2941(represent)X
3335(text)X
3521(information)X
4017(in)X
4133(a)X
720 800(number)N
1038(of)X
1142(character)X
1520(sets)X
1688(in)X
1787(a)X
1854(standardized)X
2365(manner.)X
720 1024(4.)N
858(A)X
969("multipart")X
1443(content-type)X
1967(value,)X
2243(which)X
2521(can)X
2698(be)X
2832(used)X
3051(to)X
3169(combine)X
3544(several)X
3860(separate)X
720 1136(body-parts,)N
1179(which)X
1438(may)X
1628(be)X
1743(made)X
1976(of)X
2080(different)X
2436(types)X
2663(of)X
2767(data,)X
2976(into)X
3150(a)X
3217(single)X
3471(message.)X
720 1360(5.)N
868(A)X
989("binary")X
1365(content-type)X
1899(value,)X
2184(which)X
2472(can)X
2659(be)X
2803(used)X
3032(to)X
3160(transmit)X
3529(uninterpreted)X
4096(or)X
720 1472 0.2156(partially-interpreted)AN
1516(binary)X
1786(data,)X
1995(and)X
2158(hence)X
2407(to)X
2506(implement)X
2943(an)X
3058(email)X
3297(\256le)X
3444(transfer)X
3762(service.)X
720 1696(6.)N
840(A)X
933("message")X
1361(content-type)X
1867(value,)X
2124(for)X
2260(encapsulating)X
2814(a)X
2881(mail)X
3077(message.)X
720 1920(7.)N
841(Several)X
1155(additional)X
1566(content-type)X
2074(values)X
2346(and)X
2511(subtypes,)X
2897(which)X
3158(can)X
3318(be)X
3435(used)X
3637(by)X
3759(consenting)X
720 2032(User)N
939(Agents)X
1249(to)X
1362(interoperate)X
1861(with)X
2070(additional)X
2494(message)X
2858(types)X
3098(such)X
3311(as)X
3428(audio,)X
3703(images,)X
4037(and)X
720 2144(more.)N
720 2368(8.)N
861(Several)X
1196(optional)X
1558(header)X
1861(\256elds)X
2115(that)X
2306(can)X
2486(be)X
2623(used)X
2845(to)X
2966(further)X
3274(describe)X
3641(the)X
3805(data)X
4012(in)X
4133(a)X
720 2480(message)N
1090(body)X
1326(or)X
1449(body-part,)X
1890(in)X
2008(particular)X
2421(the)X
2582(Content-Size,)X
3152(Content-ID,)X
3657(and)X
3839(Content-)X
720 2592(Description)N
1193(header)X
1474(\256elds.)X
720 2816(Finally,)N
1041(to)X
1140(specify)X
1442(and)X
1605(promote)X
1950(a)X
2017(minimal)X
2363(level)X
2575(of)X
2679 0.1953(interoperability,)AX
3322(this)X
3485(memo)X
3750(describes)X
4133(a)X
720 2928(subset)N
995(of)X
1110(the)X
1263(above)X
1528(mechanisms)X
2039(that)X
2219(de\256nes)X
2526("compliance")X
3084(with)X
3290(this)X
3464(memo.)X
3788(That)X
4000(is,)X
4122(it)X
720 3040(speci\256es)N
1083(the)X
1233(minimal)X
1587(subset)X
1859(required)X
2212(for)X
2357(an)X
2481 0.2548(implementation)AX
3120(to)X
3228(be)X
3352(called)X
3616("RFC-XXXX-)X
720 3152(compliant.")N

8 p
%%Page: 8 8
12 s 0 xH 0 xS 1 f
2368 400(-)N
2424(8)X
2496(-)X
3 f
14 s
720 704(2)N
1104(The)X
1318(Content-Type)X
2013(Header)X
2396(Field)X
1 f
12 s
720 944(The)N
899(Content-Type)X
1464(header)X
1751(\256eld)X
1952(was)X
2131(\256rst)X
2310(de\256ned)X
2623(in)X
2728(RFC)X
2939(1049.)X
3209(This)X
3410(section)X
3713(extends)X
4037(and)X
720 1056(supersedes)N
1163(that)X
1335(de\256nition.)X
1778(RFC)X
1985(1049)X
2203(content-types)X
2748(are)X
2892(all)X
3015(compliant)X
3427(with)X
3624(the)X
3768(new,)X
3978(more)X
720 1168(general)N
1033(syntax.)X
10 s
1361(\(In)X
1480(particular,)X
1833(RFC)X
2008(1049)X
2193(content-types)X
2650(omitted)X
2919(the)X
3042 0.1688(subtype/character-set)AX
3751(speci\256cation,)X
720 1280(and)N
872(always)X
1131(had)X
1283(at)X
1377(most)X
1568(two)X
1724(of)X
1827(the)X
1961(parts)X
2153(now)X
2327(called)X
2555("parameters",)X
3030(which)X
3261(were)X
3453(distinguished)X
3914(by)X
4029(their)X
720 1392(position)N
997(as)X
1084(indicating)X
1424(a)X
1480(version)X
1736(number)X
2001(and)X
2137(a)X
2193(resource)X
2486 0.4000(reference.\))AX
12 s
720 1616(The)N
894(Content-Type)X
1477(header)X
1758(\256eld)X
1953(is)X
2041(used)X
2241(to)X
2340(specify)X
2642(the)X
2784(type)X
2975(of)X
3080(data)X
3266(in)X
3366(a)X
3434(message,)X
3809(by)X
3930(giving)X
720 1728(a)N
791(type)X
985(name,)X
1246(and)X
1413(to)X
1516(provide)X
1837(auxiliary)X
2207(information)X
2689(that)X
2861(may)X
3054(be)X
3172(required)X
3520(for)X
3659(certain)X
3949(types.)X
720 1840(In)N
859(addition.)X
1258(a)X
1360(distinguished)X
1932(syntax)X
2242(is)X
2365(de\256ned)X
2707(for)X
2878(specifying)X
3338(subtype)X
3697(information,)X
720 1952(including)N
1127(character)X
1524(set)X
1674(information)X
2171(in)X
2288(the)X
2448(case)X
2656(of)X
2778(text.)X
3013(After)X
3258(the)X
3418(type)X
3626(name)X
3877(and)X
4058(the)X
720 2064(optional)N
1092(subtype,)X
1472(the)X
1647(remainder)X
2095(of)X
2232(the)X
2407(header)X
2721(\256eld)X
2949(is)X
3070(simply)X
3389(a)X
3489(set)X
3653(of)X
3790(parameter)X
720 2176(speci\256cations,)N
1292(as)X
1396(de\256ned)X
1703(for)X
1839(each)X
2040(named)X
2321(type,)X
2535(and)X
2698(an)X
2813(optional)X
3153(comment.)X
8 s
720 2368(\(COMPATIBILITY)N
1271(NOTE:)X
1509(Readers)X
1748(familiar)X
1984(with)X
2132(RFC)X
2288(1049)X
2450(Content-types)X
2843(will)X
2977(notice)X
3167(that)X
3297(the)X
3409(syntax)X
3610(has)X
3729(been)X
3883(generalized)X
720 2448(substantiallly.)N
1122(However,)X
1399(RFC)X
1549(1049)X
1705(content-types)X
2077(are)X
2182(all)X
2273(compliant)X
2556(with)X
2697(the)X
2802(new)X
2935(syntax.)X
3161(In)X
3241(particular,)X
3528(RFC)X
3677(1049)X
3832(content-types)X
720 2528(omitted)N
933(the)X
1028(subtype)X
1244(speci\256cation,)X
1600(and)X
1709(always)X
1903(had)X
2012(at)X
2075(most)X
2217(two)X
2330(of)X
2401(the)X
2497(parts)X
2639(now)X
2767(called)X
2937("parameters",)X
3302(which)X
3476(were)X
3617(distinguished)X
3977(by)X
4059(their)X
720 2608(position)N
943(as)X
1012(indicating)X
1284(a)X
1328(version)X
1532(number)X
1743(and)X
1851(a)X
1895(resource)X
2126 -0.3438(reference.\))AX
12 s
720 2800(In)N
830(the)X
978(Extended)X
1373(BNF)X
1590(notation)X
1937(of)X
2048(RFC-822,)X
2460(we)X
2603(de\256ne)X
2869(a)X
2943(Content-type)X
3477(header)X
3765(\256eld)X
3967(value)X
720 2912(as)N
824(follows:)X
7 f
10 s
720 3120(Content-Type:=)N
1440(type)X
1680(["/")X
1920(subtype])X
2352(*[";")X
2640(parameter])X
1488 3216([comment])N
720 3408(parameter)N
1200(:=)X
1584(local-part)X
720 3600(subtype)N
1104(:=)X
1248(local-part)X
720 3792(type)N
960(:=)X
1104(local-part)X
1 f
12 s
720 4000(The)N
915(type)X
1126(and)X
1310(subtype)X
1655(values)X
1947(are)X
2111(not)X
2280(case)X
2492(sensitive.)X
2923(TEXT,)X
3239(Text,)X
3486(and)X
3671(TeXt)X
3915(are)X
4079(all)X
720 4112(equivalent.)N
720 4336(An)N
867(initial)X
1123(set)X
1260(of)X
1370(nine)X
1566(content-types)X
2115(are)X
2263(de\256ned)X
2576(by)X
2702(this)X
2871(memo.)X
3190(This)X
3391(set)X
3528(of)X
3638(type)X
3835(names)X
4112(is)X
720 4448(not)N
874(intended)X
1237(to)X
1343(be)X
1465(completely)X
1925(exhaustive.)X
2416(More)X
2655(may)X
2852(be)X
2973(de\256ned)X
3286(later,)X
3512(by)X
3638(a)X
3711(future)X
3971(RFC.)X
720 4560(However,)N
1120(it)X
1198(is)X
1286(expected)X
1653(that)X
1822(most)X
2033(extensions)X
2463(to)X
2563(the)X
2706(set)X
2838(of)X
2943(objects)X
3241(that)X
3411(are)X
3554(sent)X
3734(through)X
4058(the)X
720 4672(mail)N
916(can)X
1074(be)X
1189(accomplished)X
1743(by)X
1863(the)X
2005(creation)X
2340(of)X
2444(new)X
2628(subtypes)X
2988(of)X
3092(these)X
3314(initial)X
3564(types.)X
720 4896(The)N
905(only)X
1111(constraint)X
1526(on)X
1657(the)X
1810(de\256nition)X
2214(of)X
2329(subtype)X
2663(names)X
2944(is)X
3043(the)X
3196(desire)X
3461(that)X
3641(their)X
3853(uses)X
4053(not)X
720 5008(con\257ict.)N
1106(That)X
1332(is,)X
1469(it)X
1572(would)X
1861(be)X
2001(undesirable)X
2494(to)X
2618(have)X
2849(two)X
3042(different)X
3422(communities)X
3968(using)X
720 5120("Content-type:)N
1315(binary/foobar")X
1904(to)X
2005(mean)X
2240(two)X
2410(different)X
2768(things.)X
3077(The)X
3253(process)X
3567(of)X
3674(de\256ning)X
4016(new)X
720 5232(content-subtypes,)N
1428(then,)X
1650(is)X
1746(not)X
1901(intended)X
2265(to)X
2372(be)X
2494(a)X
2568(mechanism)X
3038(for)X
3181(imposing)X
3570(restrictions,)X
4053(but)X
720 5344(simply)N
1023(a)X
1107(mechanism)X
1587(for)X
1740(publicizing)X
2215(the)X
2374(usages.)X
2719(There)X
2985(are,)X
3168(therefore,)X
3582(two)X
3768(acceptable)X
720 5456(mechanisms)N
1220(for)X
1356(de\256ning)X
1695(new)X
1879(content-type)X
2385(subtypes:)X

9 p
%%Page: 9 9
12 s 0 xH 0 xS 1 f
2368 400(-)N
2424(9)X
2496(-)X
1008 688(1.)N
1134(Private)X
1438(values)X
1715(\(starting)X
2067(with)X
2269("X-"\))X
2511(may)X
2708(be)X
2830(de\256ned)X
3144(bilaterally)X
3567(between)X
1296 800(two)N
1464(cooperating)X
1943(agents)X
2213(without)X
2531(outside)X
2833(approval)X
3194(or)X
3298(standardization)X
1008 1024(2.)N
1145("Standard")X
1606(values)X
1893(may)X
2101(be)X
2234(de\256ned)X
2559(by)X
2697(the)X
2857(publication)X
3333(of)X
3455(an)X
3588(Internet)X
1296 1136(RFC.)N
1581(The)X
1787(RFC)X
2023(need)X
2260(not)X
2438(be)X
2584(very)X
2810(long,)X
3060(but)X
3238(must)X
3480(de\256ne)X
3770(the)X
1296 1248(content-type)N
1808(and)X
1977(subtype,)X
2330(its)X
2451(associated)X
2877(parameter)X
3294(syntax,)X
3600(and)X
3770(the)X
1296 1360(format)N
1577(of)X
1681(the)X
1823(body)X
2039(of)X
2143(a)X
2210(message)X
2560(so)X
2669(marked.)X
1008 1584(3.)N
1136(The)X
1319(value)X
1561(may)X
1760(be)X
1884(inferred)X
2222(as)X
2335(an)X
2459(obvious)X
2796(and)X
2968(unambiguous)X
3519(extension)X
1296 1696(of)N
1424(the)X
1590(subtypes)X
1974(de\256ned)X
2305(in)X
2427(a)X
2517(previous)X
2895(RFC.)X
3171(For)X
3351(example,)X
3749(this)X
1296 1808(memo)N
1577(de\256nes)X
1889(an)X
2020("image")X
2374(type)X
2580(with)X
2791(subtypes)X
3168(that)X
3354(denote)X
3652(image)X
1296 1920(formats)N
1619(such)X
1824(as)X
1933(G3Fax.)X
2271(An)X
2417(additional)X
2832(image)X
3097(type)X
3292(for)X
3432(which)X
3695(there)X
1296 2032(is)N
1407(one)X
1593(clear)X
1828(and)X
2014(obvious)X
2365(name)X
2622(is)X
2734(an)X
2873(obvious)X
3225(extension)X
3642(of)X
3770(the)X
1296 2144(subtypes)N
1656(of)X
1760("image.")X
720 2368(The)N
908(nine)X
1112(initial)X
1376(prede\256ned)X
1820(content-types)X
2377(are)X
2533(detailed)X
2877(in)X
2990(the)X
3147(appendices)X
3614(of)X
3733(this)X
3911(memo.)X
720 2480(The)N
894(are:)X
3 f
1008 2704(text)N
1 f
1187(--)X
1299(textual)X
1586(information,)X
2089(with)X
2284(character)X
2662(set)X
2793(given)X
3031(by)X
3151(the)X
3293(subtype)X
3 f
1008 2816(text-plus)N
1 f
1437(--)X
1537(mostly)X
1835(textual)X
2134(information,)X
2650(with)X
2858(embedded)X
3291(formatting)X
3735(commands.)X
1296 2928(A)N
1402(simple)X
1696(default)X
2001(type)X
2204(is)X
2305(de\256ned,)X
2649(with)X
2857(possible)X
3209(subtypes)X
3581(including)X
3981(troff,)X
1296 3040(TeX,)N
1515(and)X
1678(so)X
1787(on.)X
3 f
1008 3152(message)N
1 f
1381(--)X
1482(an)X
1610(encapsulated)X
2145(message,)X
2532(with)X
2740(initial)X
3004(subtypes)X
3378(for)X
3528(partial)X
3813(messages)X
1296 3264(and)N
1459(privacy-enhanced)X
2168(messages)X
3 f
1008 3376(multipart)N
1 f
1437(--)X
1535(a)X
1612(message)X
1972(consisting)X
2396(of)X
2510(multiple)X
2866(parts)X
3087(of)X
3201(independent)X
3706(type)X
3906(values,)X
1296 3488(with)N
1491(initial)X
1741(subtype)X
2064(digest.)X
3 f
1008 3600(audio)N
1 f
1261(--)X
1349(a)X
1416(message)X
1766(containing)X
2197(audio)X
2435(data,)X
2644(with)X
2839(initial)X
3089(subtypes)X
3449(a-law)X
3687(and)X
3850(u-law.)X
3 f
1008 3712(image)N
1 f
1282(--)X
1374(a)X
1445(message)X
1799(containing)X
2234(image)X
2498(data,)X
2711(with)X
2910(initial)X
3164(subtypes)X
3528(G3fax,)X
3821(gif,)X
3981(pbm,)X
1296 3824(ppm,)N
1515(and)X
1678(pgm.)X
3 f
1008 3936(video)N
1 f
1251(--)X
1339(a)X
1406(message)X
1756(containing)X
2187(video)X
2425(data.)X
3 f
1008 4048(binary)N
1 f
1304(--)X
1392(a)X
1459(message)X
1809(containing)X
2240(some)X
2467(other)X
2689(form)X
2900(of)X
3004(binary)X
3274(data.)X
3 f
1008 4160(application)N
1 f
1521(--)X
1639(a)X
1736(message)X
2116(containing)X
2578(data)X
2794(to)X
2924(be)X
3070(processed)X
3504(by)X
3655(a)X
3753(mail-based)X
1296 4272(application.)N
720 4496(If)N
811(no)X
934(Content-type)X
1464(header)X
1748(\256eld)X
1946(is)X
2037(present,)X
2366("text")X
2617(is)X
2709(assumed,)X
3092(with)X
3291(the)X
3437(default)X
3733(\(unde\256ned\))X
720 4608(character)N
1101(set)X
1235(as)X
1342(speci\256ed)X
1711(later)X
1910(in)X
2012(this)X
2178(memo.)X
2517(This)X
2714(is)X
2804(consistent)X
3215(with)X
3412(the)X
3556(default)X
3850(message)X
720 4720(body)N
936(type)X
1126(as)X
1230(de\256ned)X
1537(by)X
1657(RFC)X
1862(822.)X
720 4944(It)N
811(should)X
1099(be)X
1222(noted)X
1468(that)X
1646(the)X
1797(list)X
1948(of)X
2061(Content-type)X
2597(values)X
2876(given)X
3123(here)X
3322(may)X
3521(be)X
3645(augmented)X
4101(in)X
720 5056(time,)N
953(via)X
1108(the)X
1263(mechanisms)X
1776(described)X
2182(above,)X
2473(and)X
2649(that)X
2831(the)X
2986(set)X
3130(of)X
3247(subtypes)X
3620(is)X
3721(expected)X
4101(to)X
720 5168(grow)N
952(substantially.)X
1522(We)X
1691(have)X
1908(simply)X
2205(attempted,)X
2645(in)X
2755(this)X
2930(RFC,)X
3171(to)X
3282(give)X
3484(as)X
3600(many)X
3850(standard)X
720 5280(Content-type)N
1247(de\256nitions)X
1677(as)X
1781(was)X
1954(possible)X
2293(given)X
2531(the)X
2673(current)X
2970(state)X
3171(of)X
3275(our)X
3427(knowledge.)X

10 p
%%Page: 10 10
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(10)X
2520(-)X
3 f
14 s
720 704(3)N
1104(The)X
1318(Content-TransferEncoding)X
2648(Header)X
3031(Field)X
1 f
12 s
720 944(Many)N
983(content-types)X
1541(are)X
1698(represented,)X
2205(in)X
2319(their)X
2536("natural")X
2922(format,)X
3243(as)X
3363(8-bit)X
3585(or)X
3705(binary)X
3991(data.)X
720 1056(Such)N
948(data)X
1144(can)X
1313(not)X
1471(be)X
1597(transmitted)X
2066(over)X
2272(existing)X
2612(Internet)X
2947(mail)X
3154(mechanisms)X
3665(because)X
4005(both)X
720 1168(RFC)N
926(821)X
1095(and)X
1259(RFC)X
1465(822)X
1634(restrict)X
1927(mail)X
2124(messages)X
2513(to)X
2614(7)X
2688(bit)X
2816(data)X
3003(with)X
3200(reasonably)X
3643(short)X
3861(lines.)X
4117(It)X
720 1280(is)N
826(necessary,)X
1266(therefore,)X
1680(to)X
1796(de\256ne)X
2072(a)X
2156(standard)X
2523(mechanism)X
3003(for)X
3156(encoding)X
3550(such)X
3767(data)X
3969(in)X
4085(an)X
720 1392(acceptable)N
1152(manner.)X
720 1616(This)N
957(RFC)X
1204(speci\256es)X
1601(that)X
1812(such)X
2054(encodings)X
2510(will)X
2726(be)X
2883(indicated)X
3303(by)X
3465(a)X
3574(new)X
3800("Content-)X
720 1728(TransferEncoding")N
1485(header)X
1773(\256eld.)X
2022(The)X
2202(Content-TransferEncoding)X
3264(\256eld)X
3465(is)X
3559(used)X
3765(to)X
3870(indicate)X
720 1840(the)N
885(type)X
1098(of)X
1225(transformation)X
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2031(has)X
2206(been)X
2435(used)X
2658(to)X
2781(represent)X
3182(the)X
3348(message)X
3722(body)X
3962(in)X
4085(an)X
720 1952(acceptable)N
1152(manner.)X
720 2176(It)N
803(may)X
993(seem)X
1215(that)X
1384(the)X
1527(Content-TransferEncoding)X
2584(could)X
2823(be)X
2939(inferred)X
3269(from)X
3481(the)X
3624(characteristics)X
720 2288(of)N
853(the)X
1024(Content-Type)X
1612(that)X
1810(is)X
1927(to)X
2055(be)X
2199(encoded,)X
2597(or,)X
2754(at)X
2877(the)X
3048(very)X
3271(least,)X
3524(certain)X
3839(Content-)X
720 2400(TransferEncodings)N
1492(could)X
1746(be)X
1877(mandated)X
2292(for)X
2444(use)X
2612(with)X
2823(speci\256c)X
3157(Content-Types.)X
3793(There)X
4058(are)X
720 2512(several)N
1022(reasons)X
1339(why)X
1533(this)X
1701(is)X
1794(not)X
1946(the)X
2093(case.)X
2312(First,)X
2541(given)X
2784(the)X
2931(varying)X
3254(types)X
3485(of)X
3593(transports)X
4000(used)X
720 2624(for)N
903(mail,)X
1170(some)X
1444(encodings)X
1905(may)X
2142(be)X
2304(appropriate)X
2814(for)X
2997(some)X
3272(Content-Type/transport)X
720 2736(combinations)N
1279(and)X
1457(not)X
1619(for)X
1770(others.)X
2068(Second,)X
2414(certain)X
2716(Content-Types)X
3327(may)X
3532(require)X
3844(different)X
720 2848(types)N
954(of)X
1065(transfer)X
1390(encoding)X
1774(under)X
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2387(circumstances.)X
2988(For)X
3152(example,)X
3535(many)X
3781(PostScript)X
720 2960(messages)N
1117(may)X
1317(consist)X
1617(entirely)X
1945(of)X
2058(short)X
2283(lines)X
2498(of)X
2611(7-bit)X
2826(data)X
3020(and)X
3192(hence)X
3450(require)X
3756(little)X
3967(or)X
4080(no)X
720 3072(encoding.)N
1126(Other)X
1374(PostScript)X
1798(messages)X
2190(\(especially)X
2637(those)X
2870(using)X
3108(Level)X
3358(2)X
3436(PostScript's)X
3930(binary)X
720 3184(encoding)N
1128(mechanism\))X
1654(may)X
1875(only)X
2101(be)X
2247(resonably)X
2676(represented)X
3175(using)X
3437(a)X
3534(binary)X
3834(transport)X
720 3296(encoding.)N
1143(Finally,)X
1486(since)X
1730(Content-Type)X
2311(is)X
2421(intended)X
2799(to)X
2920(be)X
3057(an)X
3194(open-ended)X
3689(speci\256cation)X
720 3408(mechanism,)N
1216(strict)X
1442(speci\256cation)X
1962(of)X
2075(an)X
2198(association)X
2658(between)X
3011(Content-Types)X
3615(and)X
3786(encodings)X
720 3520(effectively)N
1158(couples)X
1477(the)X
1620(speci\256cation)X
2132(of)X
2237(an)X
2353(application)X
2807(protocol)X
3153(with)X
3349(a)X
3417(speci\256c)X
3737(lower-level)X
720 3632(transport.)N
1129(This)X
1343(is)X
1450(not)X
1616(desireable)X
2050(since)X
2291(the)X
2452(developers)X
2912(of)X
3034(a)X
3119(Content-Type)X
3696(may)X
3904(be)X
4037(and)X
720 3744(should)N
1000(not)X
1147(have)X
1353(to)X
1452(be)X
1567(aware)X
1821(of)X
1925(all)X
2046(the)X
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2591(in)X
2690(use)X
2842(and)X
3005(what)X
3216(their)X
3417(limitations)X
3854(are.)X
720 3968(It)N
809(should)X
1095(be)X
1216(noted,)X
1484(also,)X
1693(that)X
1868(there)X
2092(is)X
2187(considerable)X
2705(interest)X
3020(and)X
3190(effort)X
3435(being)X
3680(expended)X
4080(on)X
720 4080(extending)N
1132(mail)X
1336(transport)X
1710(to)X
1816(permit)X
2099(8-bit)X
2312(or)X
2423(binary)X
2700(data.)X
2940(If)X
3035(such)X
3242(extensions)X
3679(ever)X
3876(become)X
720 4192(commonplace,)N
1309(the)X
1451(Content-TransferEncoding)X
2507(mechanism)X
2970(will)X
3144(quickly)X
3457(become)X
3782(irrelevant,)X
720 4304(and)N
890(it)X
974(is)X
1068(therefore)X
1446(desirable)X
1824(not)X
1977(to)X
2082("overload")X
2527(Content-TransferEncoding)X
3589(with)X
3790(additional)X
720 4416(mechanisms)N
1248(that)X
1445(might)X
1722(still)X
1919(be)X
2062(useful)X
2349(in)X
2477(such)X
2706(a)X
2802(future.)X
3133(For)X
3319(this)X
3511(reason,)X
3839(Content-)X
720 4528(TransferEncoding)N
1458(is)X
1565(restricted)X
1967(in)X
2085(its)X
2219(scope)X
2480(to)X
2597(refer)X
2821(to)X
2938(nothing)X
3274(but)X
3439(the)X
3599(7-bit)X
3823(encoding)X
720 4640(question.)N
1125(Matters)X
1451(such)X
1659(as)X
1771(the)X
1921(basic)X
2151(format)X
2440(in)X
2547(which)X
2814(information)X
3301(is)X
3397("encoded")X
3828(are)X
3978(to)X
4085(be)X
720 4752(handled)N
1049(by)X
1169(other)X
1391(mechanisms.)X
720 4976(Unlike)N
1022(Content-types,)X
1626(which)X
1901(are)X
2059(expected)X
2442(to)X
2557(proliferate,)X
3023(it)X
3117(is)X
3222(expected)X
3606(that)X
3792(there)X
4026(will)X
720 5088(never)N
961(be)X
1079(more)X
1304(than)X
1497(a)X
1567(few)X
1738(different)X
2097(Content-TransferEncoding)X
3156(values,)X
3453(both)X
3651(because)X
3983(there)X
720 5200(is)N
808(less)X
977(need)X
1184(for)X
1321(variation)X
1689(and)X
1853(because)X
2183(the)X
2326(effect)X
2571(of)X
2676(variation)X
3044(in)X
3144(Content-TransferEncoding)X
720 5312(would)N
1049(be)X
1229(more)X
1516(problematic.)X
2114(However,)X
2579(establishing)X
3128(only)X
3388(a)X
3520(single)X
3839(Content-)X
720 5424(TransferEncoding)N
1449(mechanism)X
1922(does)X
2133(not)X
2291(seem)X
2524(possible.)X
2922(In)X
3037(particular,)X
3466(there)X
3694(is)X
3793(a)X
3871(tradeoff)X
720 5536(between)N
1069(the)X
1215(desire)X
1473(for)X
1613(a)X
1684(compact)X
2039(and)X
2205(ef\256cient)X
2548(encoding)X
2928(of)X
3035(binary)X
3308(data)X
3496(and)X
3662(the)X
3807(desire)X
4064(for)X
720 5648(a)N
789(readable)X
1142(encoding)X
1521(of)X
1627(data)X
1814(that)X
1985(is)X
2075(mostly,)X
2387(but)X
2537(not)X
2687(entirely,)X
3033(7-bit)X
3242(data.)X
3478(For)X
3638(this)X
3804(reason,)X
4106(at)X
720 5760(least)N
944(two)X
1135(encoding)X
1535(mechanisms)X
2058(are)X
2222(necessary,)X
2666(a)X
2755("readable")X
3206(encoding)X
3605(and)X
3790(a)X
3879("dense")X

11 p
%%Page: 11 11
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(11)X
2520(-)X
720 688(encoding.)N
720 912(A)N
825(third)X
1043(encoding,)X
1456(for)X
2 f
1604(compressed)X
1 f
2093(\("super-dense"\))X
2730(data,)X
2951(is)X
3052(also)X
3244(strongly)X
3596(desirable.)X
4005(This)X
720 1024(RFC)N
937(does)X
1149(not)X
1307(specify)X
1620(a)X
1698("compressed")X
2265(encoding,)X
2677(due)X
2851(to)X
2961(the)X
3114(uncertain)X
3508(legal)X
3731(state)X
3943(of)X
4058(the)X
720 1136(UNIX)N
998("compress")X
1478(command)X
1897(and)X
2075(a)X
2157(lack)X
2357(of)X
2476(certainty,)X
2878(during)X
3169(the)X
3327(drafting)X
3672(of)X
3792(this)X
3971(RFC,)X
720 1248(regarding)N
1125(the)X
1279(right)X
1497(way)X
1692(to)X
1802(de\256ne)X
2072(a)X
2150(standard)X
2511(compression)X
3032(algorithm.)X
3490(It)X
3584(is)X
3683(hoped)X
3953(that)X
4133(a)X
720 1360(compressed)N
1252(Content-TransferEncoding)X
2362(will)X
2590(be)X
2759(de\256ned)X
3120(in)X
3273(a)X
3394(future)X
3703(RFC.)X
4011(Any)X
720 1472(compression)N
1231(algorithm)X
1631(for)X
1768(such)X
1969(a)X
2036(use)X
2188(should)X
2468(be)X
2583(unambiguously)X
3200(de\256ned)X
3507(and)X
3670(without)X
3988(legal)X
720 1584(encumbrances.)N
720 1808(The)N
900(Content-TransferEncoding)X
1962(\256eld)X
2163(is)X
2258(designed)X
2631(to)X
2737(specify)X
3046(a)X
3120(two-way)X
3487(mapping)X
3855(between)X
720 1920(the)N
880("native")X
1236(representation)X
1824(of)X
1946(a)X
2031(type)X
2239(of)X
2361(data)X
2564(and)X
2744(a)X
2828(representation)X
3415(that)X
3601(can)X
3776(be)X
3908(readily)X
720 2032(exchanged)N
1157(using)X
1390(7)X
1463(bit)X
1590(mail)X
1787(transport)X
2154(protocols)X
2537(as)X
2642(de\256ned)X
2950(by)X
3071(RFC)X
3277(821)X
3446(\(SMTP\).)X
3809(This)X
4005(\256eld)X
720 2144(has)N
878(not)X
1031(been)X
1243(de\256ned)X
1556(by)X
1681(any)X
1849(previous)X
2209(RFC.)X
2443(The)X
2622(\256eld's)X
2891(value)X
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3222(a)X
3294(single)X
3553(atom)X
3775(specifying)X
720 2256(the)N
862(type)X
1052(of)X
1156(encoding,)X
1557(as)X
1661(enumerated)X
2135(below.)X
2442(Formally:)X
7 f
720 2480 0.3900(Content-TransferEncoding:=)AN
2256 0.4219("BASE64"/)AX
1872 2592 0.3958("QUOTED-PRINTABLE"/)AN
1872 2704 0.4000("8BIT"/"BINARY"/)AN
1872 2816 0.4018("7BIT"/"X-"atom)AN
1 f
720 3040(These)N
985(values)X
1266(are)X
1419(not)X
1577(case)X
1778(sensitive.)X
2198(That)X
2410(is,)X
2534(Base64)X
2853(and)X
3028(BASE64)X
3405(and)X
3580(bAsE64)X
3925(are)X
4079(all)X
720 3152(equivalent.)N
1199(An)X
1345(encoding)X
1727(type)X
1921(of)X
2029(7BIT)X
2260(implies)X
2572(that)X
2745(the)X
2891(message)X
3245(is)X
3337(already)X
3649(in)X
3752(a)X
3823(seven-bit)X
720 3264(mail-ready)N
1163(representation.)X
1758(This)X
1954(value)X
2188(is)X
2277(assumed)X
2633(if)X
2717(the)X
2861(Content-TransferEncoding)X
3919(header)X
720 3376(\256eld)N
919(is)X
1011(not)X
1162(present.)X
1516(If)X
1608(the)X
1754(message)X
2108(is)X
2200(stored)X
2463(or)X
2571(transported)X
3032(via)X
3178(a)X
3249(mechanism)X
3715(that)X
3887(permits)X
720 3488(8-bit)N
926(data,)X
1135(a)X
1202(Content-TransferEncoding)X
2258(of)X
2362("8bit")X
2614(may)X
2804(be)X
2919(used.)X
3167(If)X
3255(the)X
3397(message)X
3747(is)X
3836(stored)X
4096(or)X
720 3600(transported)N
1241(via)X
1447(a)X
1578(mechanism)X
2105(that)X
2338(permits)X
2715(arbitary)X
3103(binary)X
3437(data,)X
3709(a)X
3839(Content-)X
720 3712(TransferEncoding)N
1444(of)X
1553("binary")X
1906(may)X
2101(nonetheless)X
2579(be)X
2699(used.)X
2952(In)X
3061(particular,)X
3484("8bit")X
3742(or)X
3852("binary")X
720 3824(should)N
1009(be)X
1133(used)X
1342(in)X
1449(the)X
1599(case)X
1797(where)X
2064(there)X
2289(is)X
2385(fear)X
2567(that)X
2744(the)X
2894(message)X
3252(may)X
3450("leak")X
3721(into)X
3903(a)X
3978(more)X
720 3936(restricted)N
1120(\(7-bit\))X
1407(transport)X
1790(environment.)X
2366(\(DISCUSSION:)X
3054(The)X
3246(distinction)X
3695(between)X
4058(the)X
720 4048(Content-TransferEncoding)N
1785(values)X
2064(of)X
2177("binary,")X
2558("8bit,")X
2843(and)X
3015("7bit")X
3276(may)X
3475(seem)X
3705(unimportant)X
720 4160(in)N
822(an)X
940(8-bit)X
1149(binary)X
1422(environment,)X
1960(but)X
2111(clear)X
2327(labeling)X
2666(will)X
2844(be)X
2963(of)X
3071(enormous)X
3478(value)X
3715(to)X
3818(gateways)X
720 4272(between)N
1066(8-bit)X
1273(and)X
1436(7-bit)X
1642(systems.)X
1994(The)X
2168(difference)X
2583(between)X
2928("8bit")X
3180(and)X
3343("binary")X
3691(is)X
3779(that)X
3948("8bit")X
720 4384(implies)N
1029(adherence)X
1445(to)X
1545(SMTP)X
1820(limits)X
2065(on)X
2186(line)X
2356(length)X
2623(and)X
2788(CR/LF)X
3081(semantics,)X
3511(whereas)X
3852("binary")X
720 4496(does)N
920(not.\))X
720 4720(Implementors)N
1311(may,)X
1557(if)X
1673(necessary,)X
2128(de\256ne)X
2420(new)X
2637(Content-TransferEncoding)X
3726(values,)X
4053(but)X
720 4832(should)N
1034(pre\256x)X
1316(them)X
1567(with)X
1796("x-")X
2012(to)X
2145(indicate)X
2509(their)X
2744(non-standard)X
3304(status,)X
3604(e.g.)X
3800("Content-)X
720 4944(TransferEncoding:)N
1473(x-my-new-encoding".)X
2395(However,)X
2802(unlike)X
3074(Content-types)X
3645(and)X
3816(subtypes,)X
720 5056(the)N
884(creation)X
1241(of)X
1367(new)X
1573(Content-TransferEncoding)X
2651(values)X
2943(is)X
3053(explicitly)X
3463(discouraged,)X
3997(as)X
4122(it)X
720 5168(seems)N
979(likely)X
1223(to)X
1322(hinder)X
1592 0.2083(interoperability)AX
2211(with)X
2406(little)X
2608(potential)X
2970(bene\256t.)X
720 5392(If)N
832(a)X
923(Content-TransferEncoding)X
2003(header)X
2308(\256eld)X
2527(appears)X
2869(as)X
2997(part)X
3196(of)X
3325(a)X
3417(message)X
3792(header,)X
4122(it)X
720 5504(applies)N
1019(to)X
1120(the)X
1264(entire)X
1510(message)X
1862(body,)X
2103(whether)X
2438(or)X
2543(not)X
2691(that)X
2861(body)X
3078(is)X
3167(of)X
3272(type)X
3463("multipart.")X
3944(If)X
4033(it)X
4112(is)X
720 5616(of)N
848(type)X
1062(multipart,)X
1488(the)X
1654(encoding)X
2055(applies)X
2376(recursively)X
2852(to)X
2976(all)X
3122(of)X
3251(the)X
3418(encapsulated)X
3965(parts,)X
720 5728(including)N
1148(their)X
1389(encapsulated)X
1951(headers.)X
2357(If)X
2484(a)X
2590(Content-TransferEncoding)X
3685(header)X
4005(\256eld)X
720 5840(appears)N
1068(as)X
1202(part)X
1406(of)X
1540(an)X
1685(encapsulation's)X
2338(headers,)X
2710(it)X
2819(applies)X
3147(only)X
3373(to)X
3503(the)X
3676(body)X
3923(of)X
4058(the)X

12 p
%%Page: 12 12
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(12)X
2520(-)X
720 688(encapsulated)N
1260(part.)X
1500(If)X
1606(the)X
1766(encapsulated)X
2306(part)X
2498(is)X
2604(itself)X
2839(of)X
2960(type)X
3167("multipart",)X
3664(the)X
3823(encoding)X
720 800(applies)N
1017(recursively)X
1469(to)X
1568(all)X
1689(of)X
1793(the)X
1935(encapsulated)X
2457(parts)X
2668(within)X
2938(that)X
3107(encapsulated)X
3629(part.)X
720 1024(It)N
819(should)X
1115(be)X
1246(noted)X
1500(that,)X
1709(because)X
2054(email)X
2309(is)X
2413 0.2118(character-oriented,)AX
3179(the)X
3338(mechanisms)X
3855(describe)X
720 1136(here)N
914(are)X
1060(mechanisms)X
1564(for)X
1704(encoding)X
2084(arbitrary)X
2443(byte)X
2636(streams,)X
2981(not)X
3131(bit)X
3260(streams.)X
3629(If)X
3720(a)X
3790(bit)X
3919(stream)X
720 1248(is)N
825(to)X
941(be)X
1073(encoded)X
1435(via)X
1594(one)X
1774(of)X
1895(these)X
2134(mechanisms,)X
2675(it)X
2770(should)X
3067(\256rst)X
3257(be)X
3389(converted)X
3810(to)X
3926(a)X
4010(byte)X
720 1360(stream)N
1007(using)X
1245(the)X
1393(network)X
1738(standard)X
2094(bit)X
2226(order)X
2459(\("big-endian"\),)X
3067(in)X
3172(which)X
3437(the)X
3585(earlier)X
3861(bits)X
4029(in)X
4133(a)X
720 1472(stream)N
1021(become)X
1365(the)X
1528(higher-order)X
2054(bits)X
2238(in)X
2358(a)X
2446(byte.)X
2705(A)X
2819(bit)X
2966(stream)X
3268(not)X
3436(ending)X
3743(at)X
3858(an)X
3994(8-bit)X
720 1584(boundary)N
1123(should)X
1419(be)X
1550(padded)X
1868(with)X
2079(zeroes.)X
2413(If)X
2517(the)X
2674(precise)X
2986(bit)X
3127(count)X
3380(is)X
3483(needed,)X
3819(it)X
3912(can)X
4085(be)X
720 1696(given)N
958(in)X
1057(the)X
1199(Content-Size)X
1726(header)X
2007(\256eld,)X
2226(described)X
2619(later)X
2815(in)X
2914(this)X
3077(document.)X
720 1920(The)N
894(following)X
1292(sections)X
1626(will)X
1800(de\256ne)X
2059(the)X
2201(two)X
2369(standard)X
2719(encoding)X
3096(mechanisms.)X
3 f
720 2144(3.1)N
1104(Quoted-Printable)X
1849(Content-TransferEncoding)X
1 f
720 2368(The)N
901(Quoted-Printable)X
1595(encoding)X
1979(is)X
2074(intended)X
2437(to)X
2543(represent)X
2928(data)X
3121(that)X
3298(largely)X
3598(contains)X
3951(octets)X
720 2480(less)N
889(than)X
1080(127.)X
1297(It)X
1381(encodes)X
1716(the)X
1859(data)X
2045(in)X
2145(such)X
2346(a)X
2414(way)X
2599(that)X
2769(the)X
2912(resulting)X
3274(octets)X
3523(are)X
3665(both)X
3860(unlikely)X
720 2592(to)N
823(be)X
943(modi\256ed)X
1314(by)X
1439(mail)X
1640(transport,)X
2035(and,)X
2227(when)X
2464(read)X
2659(as)X
2768(ASCII)X
3047(text,)X
3245(are)X
3392(largely)X
3689(recognisable)X
720 2704(by)N
867(humans.)X
1265(A)X
1385(message)X
1762(which)X
2048(is)X
2163(entirely)X
2508(ASCII)X
2808(may)X
3024(also)X
3229(be)X
3370(encoded)X
3741(in)X
3866(Printed-)X
720 2816(Quotable)N
1109(to)X
1220(insure)X
1491(it's)X
1650(survival)X
1996(in)X
2108(an)X
2236(environment)X
2760(which)X
3032(is)X
3133(anticipated)X
3594(to)X
3706(transverse)X
4133(a)X
720 2928(character)N
1098(translating)X
1529(gateway)X
1874(such)X
2074(as)X
2178(those)X
2405(onto)X
2600(Bitnet.)X
720 3152(In)N
827(this)X
993(encoding,)X
1398(ASCII)X
1676(characters)X
2095(33)X
2219(through)X
2546(57,)X
2694(inclusive,)X
3094(59,)X
3242(60,)X
3390(and)X
3557(62)X
3681(through)X
4008(126,)X
720 3264(inclusive,)N
1121(are)X
1268(unchanged.)X
1762(All)X
1914(other)X
2141(characters,)X
2585(including)X
2978(characters)X
3398(32)X
3523(\(SPACE\),)X
3937(58)X
4061(\(:\),)X
720 3376(61)N
843(\(=\),)X
1013(127)X
1185(\(DEL\),)X
1488(and)X
1655(all)X
1780(control)X
2081(characters,)X
2524(are)X
2670(to)X
2773(be)X
2892(represented)X
3364(as)X
3472(determined)X
3934(by)X
4058(the)X
720 3488(following)N
1118(rules:)X
1008 3712(Rule)N
1225(#1:)X
1407(Any)X
1607(8)X
1690(bit)X
1827(value)X
2071(may)X
2272(be)X
2398(represented)X
2878(by)X
3010(a)X
3089(":")X
3230(followed)X
3608(by)X
3740(a)X
3819(two)X
3999(digit)X
1008 3824(hexadecimal)N
1540(representation)X
2130(of)X
2254(the)X
2416(character's)X
2883(8-bit)X
3109(value.)X
3410(Thus,)X
3670(for)X
3825(example,)X
1008 3936(character)N
1390(12)X
1514(\(control-L,)X
1962(or)X
2070(formfeed\))X
2483(can)X
2645(be)X
2764(represented)X
3236(by)X
3360(":0C",)X
3629(the)X
3775(equal-sign)X
1008 4048(character)N
1388(\(61\))X
1574(can)X
1734(be)X
1851(represented)X
2321(by)X
2443(":3D",)X
2714(and)X
2878(the)X
3021(colon)X
3260(character)X
3639(\(58\))X
3824(itself)X
4042(can)X
1008 4160(be)N
1123(represented)X
1591(by)X
1712(":3A".)X
2007(Rule)X
2214(#1)X
2335(is)X
2424(the)X
2567(REQUIRED)X
3077(representation)X
3648(for)X
3785(characters)X
1008 4272(127)N
1176(through)X
1499(160)X
1667(and)X
1830(for)X
1966(character)X
2344(255.)X
1008 4496(Rule)N
1214(#2:)X
1385(An)X
1526(8)X
1598(bit)X
1724(value)X
1957(from)X
2168(161)X
2336(through)X
2659(254)X
2827(may,)X
3041(alternately,)X
3497(be)X
3612(represented)X
4080(by)X
1008 4608(an)N
1129(equal-sign)X
1559(character)X
1942(followed)X
2313(by)X
2438(the)X
2585(single)X
2844(character)X
3227(obtained)X
3588(by)X
3713(the)X
3860(removal)X
1008 4720(of)N
1114(the)X
1258(high)X
1455(order)X
1685(bit,)X
1838(i.e.)X
1983(by)X
2106(subtracting)X
2561(128)X
2732(from)X
2946(the)X
3091(value.)X
3375(Thus)X
3618(the)X
3763(8)X
3838(bit)X
3967(value)X
1008 4832(193)N
1183(may)X
1380(be)X
1502(represented)X
1977(as)X
2088("=A".)X
2368(Rule)X
2581(#2)X
2708(is)X
2803(completely)X
3262(optional,)X
3632(given)X
3876(rule)X
4056(#1,)X
1008 4944(but)N
1170(is)X
1273(provided)X
1654(for)X
1805(improved)X
2213(readability)X
2665(of)X
2784(some)X
3026(8-bit)X
3248(character)X
3642(sets)X
3826(in)X
3941(which)X
1008 5056(turning)N
1328(on)X
1466(the)X
1626(8th)X
1791(bit)X
1935(produces)X
2324(a)X
2409(character)X
2805(similar)X
3115(to)X
3232(the)X
3392(corresponding)X
3984(7)X
4074(bit)X
1008 5168(character,)N
1410(e.g.)X
1573(the)X
1715(8th)X
1862(bit)X
1988(simply)X
2274(adds)X
2474(an)X
2589(umlaut.)X
1008 5392(Rule)N
1221(#3:)X
1399(The)X
1581(literal)X
1839(equal-sign)X
2272(and)X
2443(colon)X
2689(characters)X
3112(must)X
3331(themselves)X
3791(be)X
3914(quoted)X
1008 5504(by)N
1132(colons.)X
1459(Thus,)X
1703(the)X
1849(colon)X
2091(may)X
2285(be)X
2404(represented)X
2876(as)X
2984("::")X
3144(and)X
3311(the)X
3457(equal-sign)X
3886(as)X
3993(":=".)X
1008 5616(Note)N
1222(that)X
1394(this)X
1560(is)X
1651(not)X
1801(ambiguous)X
2250(with)X
2449(regard)X
2723(to)X
2826(the)X
2972(\256rst)X
3149(clause,)X
3442(because)X
3775(neither)X
4071(":")X
1008 5728(nor)N
1160("=")X
1316(are)X
1458(part)X
1632(of)X
1736(the)X
1878(hexadecimal)X
2390(alphabet.)X

13 p
%%Page: 13 13
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(13)X
2520(-)X
1008 688(Rule)N
1222(#4:)X
1402(A)X
1504(colon)X
1751(at)X
1854(the)X
2005(end)X
2177(of)X
2290(a)X
2366(line)X
2544(may)X
2743(be)X
2867(used)X
3076(to)X
3184(indicate)X
3523(a)X
3599(non-signi\256cant)X
1008 800(line)N
1194(break.)X
1497(That)X
1715(is,)X
1844(if)X
1943(one)X
2122(needs)X
2381(to)X
2496(include)X
2820(a)X
2903(long)X
3114(line)X
3299(without)X
3633(line)X
3818(breaks,)X
4133(a)X
1008 912(message)N
1371(encoded)X
1729(with)X
1937(the)X
2092(quoted-printable)X
2766(encoding)X
3156(should)X
3449(include)X
3771("soft")X
4031(line)X
1008 1024(breaks)N
1288(in)X
1392(which)X
1656(the)X
1803(line)X
1977(break)X
2220(is)X
2313(preceded)X
2690(by)X
2815(a)X
2887(colon.)X
3178(Thus)X
3398(if)X
3485(the)X
3631("raw")X
3881(form)X
4096(of)X
1008 1136(the)N
1150(line)X
1319(is)X
1407(a)X
1474(single)X
1728(line)X
1897(that)X
2066(says:)X
7 f
8 s
1008 1328(Now's)N
1236(the)X
1388(time)X
1578(for)X
1731(all)X
1884(men)X
2037(to)X
2152(come)X
2343(to)X
2458(the)X
2611(aid)X
2764(of)X
2879(their)X
3108(country.)X
3489(Now's)X
3718(the)X
3871(time)X
4062(for)X
1008 1408(all)N
1161(men)X
1314(to)X
1429(come)X
1620(to)X
1735(the)X
1888(aid)X
2041(of)X
2156(their)X
2385(country.)X
2766(Now's)X
2995(the)X
3148(time)X
3339(for)X
3492(all)X
3644(men)X
3796(to)X
3910(come)X
4100(to)X
1008 1488(the)N
1160(aid)X
1312(of)X
1426(their)X
1654(country.)X
1 f
12 s
1008 1680(This)N
1203(could)X
1441(be)X
1556(represented,)X
2048(in)X
2147(the)X
2289(quoted-printable)X
2950(encoding,)X
3351(as)X
7 f
8 s
1008 1872(Now's)N
1236(the)X
1388(time)X
1578(for)X
1730(all)X
1882(men)X
2034(to)X
2148(come)X
2338(to)X
2452(the)X
2604(aid)X
2756(of)X
2870(their)X
3098(country.)X
3478(:)X
1008 1952(Now's)N
1236(the)X
1388(time)X
1578(for)X
1730(all)X
1882(men)X
2034(to)X
2148(come)X
2338(to)X
2452(the)X
2604(aid)X
2756(of)X
2870(their)X
3098(country.)X
3478(:)X
1008 2032(Now's)N
1236(the)X
1388(time)X
1578(for)X
1730(all)X
1882(men)X
2034(to)X
2148(come)X
2338(to)X
2452(the)X
2604(aid)X
2756(of)X
2870(their)X
3098(country.)X
1 f
12 s
1008 2224(This)N
1204(provides)X
1560(a)X
1628(mechanism)X
2092(with)X
2288(which)X
2548(long)X
2744(lines)X
2951(are)X
3094(encoded)X
3440(in)X
3540(such)X
3741(a)X
3809(way)X
3995(as)X
4101(to)X
1008 2336(be)N
1133(restored)X
1477(by)X
1607(the)X
1759(user)X
1952(agent.)X
2290(The)X
2473(quoted-printable)X
3143(encoding)X
3529(REQUIRES)X
4031(that)X
1008 2448(lines)N
1221(be)X
1343(broken)X
1641(so)X
1757(that)X
1933(they)X
2131(are)X
2281(no)X
2409(more)X
2639(than)X
2837(78)X
2965(characters)X
3388(long,)X
3615(using)X
3855(soft)X
4031(line)X
1008 2560(breaks)N
1283(when)X
1515(necessary.)X
1008 2784(Rule)N
1227(#5:)X
1411(Although)X
1811(the)X
1966(SPACE)X
2301(\(32\))X
2498(and)X
2675(TAB)X
2905(\(9\))X
3055(characters)X
3484(may)X
3688(generally)X
4085(be)X
1008 2896(represented)N
1491(as)X
1610(themselves,)X
2101(they)X
2306(should)X
2601(NOT)X
2837(be)X
2967(so)X
3091(represented)X
3574(at)X
3682(the)X
3838(end)X
4015(of)X
4133(a)X
1008 3008(line,)N
1205(because)X
1538(some)X
1769(MTA's)X
2079(are)X
2225(known)X
2514(to)X
2617(remove)X
2934("white)X
3215(space")X
3496(from)X
3711(the)X
3857(end)X
4024(of)X
4133(a)X
1008 3120(line.)N
1235(In)X
1349(such)X
1559(cases,)X
1820(the)X
1972(characters)X
2397(MUST)X
2696(be)X
2820(represented)X
3297(as)X
3410(in)X
3518(rule)X
3701(#1)X
3830(\(as)X
3975(":20")X
1008 3232(and)N
1179(":09")X
1412(respectively\))X
1942(or)X
2054(as)X
2167(themselves,)X
2652(followed)X
3027(by)X
3156(a)X
3232(soft)X
3409(line)X
3587(break)X
3834(followed)X
1008 3344(by)N
1138(a)X
1215(real)X
1394(line)X
1573(break.)X
1869(Of)X
2004(course,)X
2313(these)X
2544(characters)X
2968(can)X
3135(be)X
3259(so)X
3377(represented)X
3854(within)X
4133(a)X
1008 3456(line)N
1181(as)X
1289(well,)X
1507(if)X
1594(this)X
1761(is)X
1853(desired;)X
2186(in)X
2289(the)X
2435(case)X
2629(of)X
2737(the)X
2883(TAB)X
3103(character,)X
3509(representing)X
4013(it)X
4096(as)X
1008 3568(":09")N
1244(may)X
1445(be)X
1571(somewhat)X
1996(more)X
2229(robust)X
2504(even)X
2720(in)X
2829(the)X
2981(middle)X
3283(of)X
3397(a)X
3474(line.)X
3701(Note)X
3922(that)X
4101(in)X
1008 3680(decoding)N
1386(a)X
1454(quoted-printable)X
2116(message,)X
2491(any)X
2656(trailing)X
2961(white)X
3201(space)X
3441(on)X
3563(a)X
3632(line)X
3803(should)X
4085(be)X
1008 3792(deleted,)N
1335(as)X
1439(it)X
1517(will)X
1691(necessarily)X
2143(have)X
2349(been)X
2555(added)X
2809(by)X
2929 0.2841(intermediate)AX
3436(transport)X
3802(agents.)X
1008 4016(Rule)N
1248(#6:)X
1429(A)X
1556(CR)X
1742(LF)X
1912(pair)X
2120(normally)X
2526(constitutes)X
2996(a)X
3097(line)X
3300(break)X
3572(and)X
3770(should)X
4085(be)X
1008 4128(represented)N
1478(by)X
1600(a)X
1669(line)X
1839(break)X
2078(in)X
2178(the)X
2321(quoted-printable)X
2983(encoding)X
3361(if)X
3445(that)X
3615(is)X
3704(its)X
3820(meaning.)X
1008 4240(Isolated)N
1339(CRs,)X
1554(LFs,)X
1753(and)X
1919(LF)X
2058(CR)X
2213(sequences)X
2630(must)X
2844(be)X
2962(represented)X
3433(using)X
3668(the)X
3813(:0D,)X
4008(:0A,)X
1008 4352(and)N
1191(:0D:0A)X
1523(notations)X
1919(respectively.)X
2452(CR)X
2623(LF)X
2778(sequences)X
3211(that)X
3399(are)X
3560(not)X
3726(intended)X
4101(to)X
1008 4464(represent)N
1387(a)X
1457(line)X
1629(break)X
1870(should)X
2153(be)X
2271(encoded)X
2619(as)X
2726(:0D:0A)X
3041(to)X
3143(re\257ect)X
3411(this)X
3577(usage.)X
3871(In)X
3978(other)X
1008 4576(words,)N
1295(the)X
1442(concept)X
1771("end)X
1977(of)X
2085(line")X
2297(is)X
2389(represented,)X
2885(in)X
2988(the)X
3134(quoted-printable)X
3799(encoding,)X
1008 4688(by)N
1153(CR)X
1330(LF,)X
1515(although)X
1901(this)X
2089(may)X
2304(be)X
2444(modi\256ed)X
2835(in)X
2960(local)X
3198(storage)X
3526(formats.)X
3918(Literal)X
1008 4800(occurrences)N
1514(of)X
1640(CR)X
1814(or)X
1940(LF)X
2098(that)X
2289(do)X
2431(not)X
2599(occur)X
2858(as)X
2983(CRLF)X
3268(or)X
3393(are)X
3556(not)X
3724(intended)X
4101(to)X
1008 4912(represent)N
1385(end-of-line)X
1837(markers)X
2171(must)X
2382(be)X
2497(represented)X
2965(in)X
3064(hexadecimal.)X
720 5136(Since)N
958(the)X
1101(hyphen)X
1409(character)X
1788(\("-"\))X
1987(is)X
2076(represented)X
2545(as)X
2650(itself)X
2868(in)X
2968(the)X
3111(Quoted-Printable)X
3799(encoding,)X
720 5248(the)N
863(usual)X
1091(care)X
1277(must)X
1489(be)X
1605(taken,)X
1863(when)X
2095(encapsulating)X
2649(a)X
2716(quoted-printable)X
3377(encoded)X
3722(message)X
4096(or)X
720 5360(body)N
951(part)X
1140(in)X
1254(a)X
1336(multipart)X
1729(message,)X
2118(to)X
2232(ensure)X
2522(that)X
2706(the)X
2864(encapsulation)X
3434(boundary)X
3837(does)X
4053(not)X
720 5472(appear)N
1010(anywhere)X
1417(in)X
1525(the)X
1676(message.)X
2083(See)X
2255(the)X
2406(de\256nition)X
2808(of)X
2921(multipart)X
3307(messages,)X
3726(later)X
3930(in)X
4037(this)X
720 5584(memo.)N

14 p
%%Page: 14 14
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(14)X
2520(-)X
3 f
720 688(3.2)N
1104(Base64)X
1416(Content-TransferEncoding)X
1 f
720 912(The)N
903(Base64)X
1219(Content-TransferEncoding)X
2284(is)X
2381(designed)X
2756(to)X
2864(represent)X
3250(arbitrary)X
3615(8)X
3696(bit)X
3831(data)X
4025(in)X
4133(a)X
720 1024(form)N
942(that)X
1122(is)X
1221(not)X
1379(humanly)X
1751(readable.)X
2161(The)X
2346(encoding)X
2734(and)X
2908(decoding)X
3296(algorithms)X
3743(are)X
3895(simple,)X
720 1136(but)N
885(the)X
1045(encoded)X
1408(data)X
1611(is)X
1718(only)X
1932(about)X
2189(33)X
2328(percent)X
2655(larger)X
2923(than)X
3132(the)X
3293(unencoded)X
3753(data.)X
4005(This)X
720 1248(encoding)N
1104(is)X
1199(based)X
1449(on)X
1576(the)X
1725(one)X
1895(used)X
2102(in)X
2208(Privacy)X
2533(Enhanced)X
2944(Mail)X
3157(applications,)X
3678(as)X
3788(de\256ned)X
4101(in)X
720 1360(RFC)N
927(1113.)X
1218(The)X
1395(base64)X
1689(encoding)X
2069(is)X
2160(adapted)X
2487(from)X
2701(RFC)X
2909(1113,)X
3152(with)X
3350(two)X
3521(changes:)X
3909(base64)X
720 1472(elminates)N
1135(the)X
1298("*")X
1469(mechanism)X
1953(for)X
2110(embedded)X
2551(clear)X
2784(text)X
2974(and)X
3158(de\256nes)X
3475(a)X
3563(new)X
3768(syntax)X
4064(for)X
720 1584(portable)N
1060(end-of-line)X
1512(markers,)X
1870(using)X
2102(the)X
2244(comma)X
2552(character.)X
720 1808(A)N
838(66-character)X
1369(subset)X
1658(of)X
1787(International)X
2329(Alphabet)X
2731(IA5)X
2929(is)X
3042(used,)X
3291(enabling)X
3673(6)X
3771(bits)X
3960(to)X
4085(be)X
720 1920(represented)N
1198(per)X
1354(printable)X
1730(character.)X
2141(\(The)X
2356(extra)X
2582(65th)X
2786(and)X
2958(66th)X
3162(characters)X
3586("=")X
3751(and)X
3923(",")X
4058(are)X
720 2032(used)N
924(to)X
1027(signify)X
1322(special)X
1618(processing)X
2057(functions.\))X
2499(This)X
2699(subset)X
2968(has)X
3125(the)X
3272(important)X
3676(property)X
4031(that)X
720 2144(it)N
800(is)X
890(represented)X
1360(identicially)X
1821(in)X
1922(IA5)X
2097(and)X
2262(ASCII,)X
2562(and)X
2727(all)X
2850(characters)X
3267(in)X
3368(the)X
3512(subset)X
3778(are)X
3921(part)X
4096(of)X
720 2256(the)N
864(so-called)X
1238(invariant)X
1607(subset)X
1874(of)X
1981(EBCDIC.)X
2384(Other)X
2630(popular)X
2951(encodings)X
3368(such)X
3571(as)X
3678(the)X
3823(encoding)X
720 2368(used)N
933(by)X
1066(the)X
1221(UUENCODE)X
1785(utility)X
2053(and)X
2229(the)X
2384(base85)X
2687(encoding)X
3076(speci\256ed)X
3454(as)X
3570(part)X
3756(of)X
3872(Level)X
4128(2)X
720 2480(PostScript)N
1180(do)X
1341(not)X
1529(share)X
1797(these)X
2060(properties,)X
2534(and)X
2738(thus)X
2963(do)X
3124(not)X
3312(ful\256ll)X
3591(the)X
3774(portability)X
720 2592(requirements)N
1247(placed)X
1523(on)X
1643(a)X
1710(binary)X
1980(transport)X
2346(encoding)X
2723(for)X
2859(mail.)X
720 2816(The)N
894(encoding)X
1271(process)X
1583(represents)X
1997(24-bit)X
2251(groups)X
2536(of)X
2640(input)X
2862(bits)X
3025(as)X
3129(output)X
3399(strings)X
3679(of)X
3783(4)X
3855(encoded)X
720 2928(characters.)N
1186(Proceeding)X
1670(from)X
1908(left)X
2088(to)X
2214(right)X
2447(across)X
2738(a)X
2832(24-bit)X
3113(input)X
3362(group)X
3637(is)X
3752(formed)X
4080(by)X
720 3040(concatenating)N
1292(3)X
1376(8-bit)X
1594(input)X
1828(groups,)X
2149(this)X
2325(is)X
2426(then)X
2629(treated)X
2929(as)X
3046(4)X
3131(concatenated)X
3672(6-bit)X
3891(groups.)X
720 3152(When)N
979(encoding)X
1360(a)X
1431(bit)X
1561(stream)X
1846(via)X
1992(the)X
2138(base64)X
2433(encoding,)X
2838(the)X
2984(bit)X
3114(stream)X
3399(should)X
3683(be)X
3802(presumed)X
720 3264(to)N
821(be)X
939(ordered)X
1260(with)X
1458(the)X
1603(most-signi\256cant-bit)X
2384(\256rst.)X
2608(That)X
2812(is,)X
2927(the)X
3072(\256rst)X
3248(bit)X
3377(in)X
3479(the)X
3624(stream)X
3908(will)X
4085(be)X
720 3376(the)N
866(high-order)X
1300(bit)X
1430(in)X
1533(the)X
1679(\256rst)X
1856(byte,)X
2074(and)X
2241(the)X
2387(eighth)X
2655(bit)X
2784(with)X
2982(be)X
3100(the)X
3245(low-order)X
3651(bit)X
3780(in)X
3882(the)X
4027(\256rst)X
720 3488(byte,)N
934(and)X
1097(so)X
1206(on.)X
720 3712(Each)N
960(6-bit)X
1189(group)X
1460(is)X
1571(used)X
1794(as)X
1921(an)X
2059(index)X
2320(into)X
2517(an)X
2655(array)X
2900(of)X
3028(64)X
3172(printable)X
3563(characters.)X
4026(The)X
720 3824(character)N
1126(referenced)X
1585(by)X
1733(the)X
1903(index)X
2169(is)X
2285(placed)X
2589(in)X
2716(the)X
2886(output)X
3184(string.)X
3479(These)X
3761(characters,)X
720 3936(identi\256ed)N
1110(in)X
1211(Table)X
1457(1)X
1531(below,)X
1816(are)X
1961(selected)X
2299(so)X
2411(as)X
2518(to)X
2620(be)X
2738(universally)X
3193(representable,)X
3758(and)X
3924(the)X
4069(set)X
720 4048(excludes)N
1081(characters)X
1496(with)X
1691(particular)X
2085(signi\256cance)X
2569(to)X
2668(SMTP)X
2942(\(e.g.,)X
3161(".",)X
3311("CR",)X
3565("LF"\).)X
3 f
14 s
2269 4288(Table)N
2570(1)X
1 f
12 s
7 f
10 s
816 4528(Value)N
1104(Encoding)X
1584(Value)X
1872(Encoding)X
2352(Value)X
2640(Encoding)X
3120(Value)X
3408(Encoding)X
1056 4624(0)N
1152(A)X
1776(17)X
1920(R)X
2544(34)X
2688(i)X
3312(51)X
3456(z)X
1056 4720(1)N
1152(B)X
1776(18)X
1920(S)X
2544(35)X
2688(j)X
3312(52)X
3456(0)X
1056 4816(2)N
1152(C)X
1776(19)X
1920(T)X
2544(36)X
2688(k)X
3312(53)X
3456(1)X
1056 4912(3)N
1152(D)X
1776(20)X
1920(U)X
2544(37)X
2688(l)X
3312(54)X
3456(2)X
1056 5008(4)N
1152(E)X
1776(21)X
1920(V)X
2544(38)X
2688(m)X
3312(55)X
3456(3)X
1056 5104(5)N
1152(F)X
1776(22)X
1920(W)X
2544(39)X
2688(n)X
3312(56)X
3456(4)X
1056 5200(6)N
1152(G)X
1776(23)X
1920(X)X
2544(40)X
2688(o)X
3312(57)X
3456(5)X
1056 5296(7)N
1152(H)X
1776(24)X
1920(Y)X
2544(41)X
2688(p)X
3312(58)X
3456(6)X
1056 5392(8)N
1152(I)X
1776(25)X
1920(Z)X
2544(42)X
2688(q)X
3312(59)X
3456(7)X
1056 5488(9)N
1152(J)X
1776(26)X
1920(a)X
2544(43)X
2688(r)X
3312(60)X
3456(8)X

15 p
%%Page: 15 15
10 s 0 xH 0 xS 7 f
1 f
12 s
2344 384(-)N
2400(15)X
2520(-)X
7 f
10 s
1008 672(10)N
1152(K)X
1776(27)X
1920(b)X
2544(44)X
2688(s)X
3312(61)X
3456(9)X
1008 768(11)N
1152(L)X
1776(28)X
1920(c)X
2544(45)X
2688(t)X
3312(62)X
3456(+)X
1008 864(12)N
1152(M)X
1776(29)X
1920(d)X
2544(46)X
2688(u)X
3312(63)X
3456(/)X
1008 960(13)N
1152(N)X
1776(30)X
1920(e)X
2544(47)X
2688(v)X
1008 1056(14)N
1152(O)X
1776(31)X
1920(f)X
2544(48)X
2688(w)X
3168(\(pad\))X
3456(=)X
1008 1152(15)N
1152(P)X
1776(32)X
1920(g)X
2544(49)X
2688(x)X
3168(\(eol\))X
3456(,)X
1008 1248(16)N
1152(Q)X
1776(33)X
1920(h)X
2544(50)X
2688(y)X
1 f
12 s
720 1456(Special)N
1050(processing)X
1507(is)X
1617(performed)X
2064(if)X
2169(fewer)X
2435(than)X
2648(24)X
2791(bits)X
2977(are)X
3142(available)X
3538(at)X
3655(the)X
3820(end)X
4006(of)X
4133(a)X
720 1568(message)N
1103(or)X
1240(encapsulated)X
1795(part)X
2002(of)X
2139(a)X
2239(message.)X
2670(A)X
2796(full)X
2987(encoding)X
3396(quantum)X
3789(is)X
3909(always)X
720 1680(completed)N
1157(at)X
1262(the)X
1415(end)X
1590(of)X
1706(a)X
1785(message.)X
2171(When)X
2437(fewer)X
2692(than)X
2894(24)X
3026(input)X
3260(bits)X
3435(are)X
3589(available)X
3974(in)X
4085(an)X
720 1792(input)N
944(group,)X
1218(zero)X
1410(bits)X
1575(are)X
1719(added)X
1975(\(on)X
2129(the)X
2273(right\))X
2512(to)X
2612(form)X
2824(an)X
2940(integral)X
3260(number)X
3579(of)X
3684(6-bit)X
3891(groups.)X
720 1904(Output)N
1013(character)X
1393(positions)X
1766(which)X
2027(are)X
2171(not)X
2321(required)X
2669(to)X
2771(represent)X
3151(actual)X
3409(input)X
3634(data)X
3822(are)X
3967(set)X
4101(to)X
720 2016(the)N
870(character)X
1256("=".)X
1468(Since)X
1714(all)X
1843(canonically)X
2319(encoded)X
2671(output)X
2948(is)X
3043(an)X
3165(integral)X
3491(number)X
3816(of)X
3927(octets,)X
720 2128(only)N
919(the)X
1065(following)X
1467(cases)X
1698(can)X
1860(arise:)X
2097(\(1\))X
2237(the)X
2384(\256nal)X
2584(quantum)X
2950(of)X
3059(encoding)X
3441(input)X
3668(is)X
3761(an)X
3881(integral)X
720 2240(multiple)N
1068(of)X
1174(24)X
1296(bits;)X
1488(here,)X
1704(the)X
1848(\256nal)X
2045(unit)X
2221(of)X
2327(encoded)X
2674(output)X
2946(will)X
3122(be)X
3239(an)X
3356(integral)X
3676(multiple)X
4023(of)X
4128(4)X
720 2352(characters)N
1138(with)X
1336(no)X
1459("=")X
1618(padding,)X
1979(\(2\))X
2118(the)X
2263(\256nal)X
2461(quantum)X
2825(of)X
2932(encoding)X
3312(input)X
3537(is)X
3628(exactly)X
3934(8)X
4010(bits;)X
720 2464(here,)N
936(the)X
1080(\256nal)X
1277(unit)X
1453(of)X
1559(encoded)X
1905(output)X
2176(will)X
2351(be)X
2467(two)X
2636(characters)X
3052(followed)X
3419(by)X
3540(two)X
3709("=")X
3866(padding)X
720 2576(characters,)N
1168(or)X
1281(\(3\))X
1427(the)X
1579(\256nal)X
1784(quantum)X
2155(of)X
2269(encoding)X
2656(input)X
2888(is)X
2986(exactly)X
3299(16)X
3429(bits;)X
3629(here,)X
3853(the)X
4005(\256nal)X
720 2688(unit)N
894(of)X
998(encoded)X
1343(output)X
1613(will)X
1787(be)X
1902(three)X
2119(characters)X
2534(followed)X
2900(by)X
3020(one)X
3183("=")X
3339(padding)X
3673(character.)X
720 2912(One)N
925(addition)X
1287(is)X
1397(made)X
1652(to)X
1773(the)X
1937(RFC)X
2164(1113)X
2402(speci\256cation)X
2935(of)X
3061(this)X
3246(encoding:)X
3696(The)X
3892(comma)X
720 3024(character)N
1110(\(",",)X
1303(ASCII)X
1588(44\))X
1751(may)X
1952(be)X
2078(used)X
2289(to)X
2399(represent)X
2787(an)X
2913("end-of-line")X
3454(or)X
3569("end-of-record")X
720 3136(marker.)N
1049(If)X
1145(line-oriented)X
1670(data)X
1863(are)X
2013(encoded)X
2366(using)X
2606(base64,)X
2929(it)X
3015(is)X
3111(desirable)X
3491(to)X
3598(restore)X
3893(end-of-)X
720 3248(line)N
902(markers)X
1249(according)X
1666(to)X
1778(the)X
1932(local)X
2156(convention.)X
2668(The)X
2854(RFC)X
3071(1113)X
3299(speci\256cation,)X
3846(as)X
3962(given)X
720 3360(above,)N
1008(offers)X
1266(no)X
1396(way)X
1590(to)X
1699(differentiate)X
2205(between)X
2560(a)X
2637(binary)X
2917(\256le)X
3074(including)X
3472(a)X
3549(CRLF)X
3823(sequence)X
720 3472(and)N
888(a)X
960(portable)X
1305(end-of-line)X
1762(marker.)X
2112(This)X
2311(memo)X
2580(augments)X
2977(that)X
3150(mechanism)X
3617(to)X
3720(permit)X
4000(such)X
720 3584(differentiation,)N
1320(as)X
1424(follows.)X
1784(To)X
1915(represent)X
2292(an)X
2407(end-of-line)X
2859(marker:)X
1008 3808(1.)N
1135(Treat)X
1370(the)X
1519(byte)X
1716(stream)X
2004(preceding)X
2416(the)X
2566(end-of-line)X
3026(as)X
3138(terminating)X
3615(with)X
3818(at)X
1008 3920(the)N
1166(end)X
1345(of)X
1465(the)X
1623(line)X
1808(--)X
1912(that)X
2097(is,)X
2225(pad)X
2404(with)X
2615("=")X
2786(characters)X
3216(as)X
3335(appropriate)X
3813(to)X
1008 4032(complete)N
1386(the)X
1528(representation)X
2098(of)X
2202(the)X
2344(line.)X
1008 4256(2.)N
1128(Insert)X
1371(a)X
1438(comma)X
1746(character.)X
1008 4480(3.)N
1139(Resume)X
1484(the)X
1637(encoding)X
2025(starting)X
2349(a)X
2427(new)X
2622(24-bit)X
2887(input)X
3120(group)X
3379(with)X
3585(the)X
3739(\256rst)X
1008 4592(character)N
1386(on)X
1506(the)X
1648(next)X
1838(line.)X
720 4816(Thus,)N
967(while)X
1212(encoding)X
1596(the)X
1745(binary)X
2022(sequence)X
2406("a-b-c-CR-LF-a-b-c")X
3272(yields)X
3534(the)X
3684(octets)X
3941(which)X
720 4928(are)N
867(represented)X
1340(in)X
1444(ASCII)X
1723(as)X
1832("YWJjDQphYmM=",)X
2704(encoding)X
3086("a-b-c")X
3391(followed)X
3762(by)X
3886(an)X
4005(end-)X
720 5040(of-line)N
1011(followed)X
1387(by)X
1517("a-b-c")X
1828(yields)X
2093("YWJj,YWJj")X
2702(They)X
2935(will)X
3120(be)X
3246(translated)X
3656(back)X
3873(into)X
4058(the)X
720 5152(same)N
949(thing)X
1178(if)X
1268(the)X
1417(local)X
1635(end-of-line)X
2093(convention)X
2551(is)X
2645(CRLF,)X
2939(but)X
3092(they)X
3288(will)X
3468(be)X
3589(translated)X
3994(back)X
720 5264(differently)N
1151(if)X
1234(the)X
1376(end-of-line)X
1828(convention)X
2280(is)X
2368(anything)X
2729(other)X
2951(than)X
3141(CRLF.)X
720 5488(Note:)N
961(There)X
1213(is)X
1304(no)X
1428(need)X
1638(to)X
1741(worry)X
1998(about)X
2240(quoting)X
2562(apparent)X
2922(encapsulation)X
3480(boundaries)X
3930(within)X
720 5600(base64-encoded)N
1375(parts)X
1597(of)X
1712(multipart)X
2101(messages,)X
2523(because)X
2863(no)X
2994(hyphen)X
3312(characters)X
3738(are)X
3891(used)X
4101(in)X
720 5712(the)N
862(base64)X
1153(encoding.)X

16 p
%%Page: 16 16
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(16)X
2520(-)X
3 f
14 s
720 704(4)N
1104(Additional)X
1642(Optional)X
2093(Content-)X
2546(Header)X
2929(Fields)X
12 s
720 944(4.1)N
1104(Optional)X
1491(Content-ID)X
1983(Header)X
2312(Field)X
1 f
720 1168(In)N
831(constructing)X
1338(a)X
1412(high-level)X
1834(user)X
2025(agent,)X
2289(it)X
2374(may)X
2571(be)X
2693(desirable)X
3072(to)X
3178(allow)X
3423(one)X
3594(message)X
3952(body-)X
720 1280(part)N
895(to)X
995(make)X
1229(reference)X
1613(to)X
1713(another.)X
2075(This)X
2270(may)X
2460(be)X
2575(done)X
2786(using)X
3018(the)X
3160("Content-ID")X
3700(header)X
3981(\256eld,)X
720 1392(which)N
979(is)X
1067(syntactically)X
1579(identical)X
1936(to)X
2035(the)X
2177("Message-ID")X
2748(header)X
3029(\256eld:)X
7 f
720 1616 0.4167(Content-ID)AN
1358(:=)X
1532("<")X
1764(msg-id)X
2170(">")X
3 f
720 1840(4.2)N
1104(Optional)X
1491(Content-Description)X
2352(Header)X
2681(Field)X
1 f
720 2064(It)N
804(may)X
995(be)X
1111(desirable)X
1484(to)X
1584(associate)X
1957(some)X
2185(descriptive)X
2633(information)X
3113(with)X
3310(a)X
3379(given)X
3619(body-part.)X
4043(For)X
720 2176(example,)N
1115(it)X
1213(may)X
1423(be)X
1558(useful)X
1836(to)X
1954(mark)X
2195(an)X
2329("image")X
2686(body-part)X
3103(as)X
3226("a)X
3351(picture)X
3662(of)X
3785(the)X
3946(Space)X
720 2288(Shuttle)N
1017(Endeavor.")X
1497(Such)X
1713(text)X
1882(may)X
2072(be)X
2187(placed)X
2463(in)X
2562(the)X
2704(Content-Description)X
3514(header)X
3795(\256eld.)X
7 f
720 2512 0.3958(Content-Description)AN
1880(:=)X
2054(*text)X
3 f
720 2736(4.3)N
1104(Optional)X
1491(Content-Size)X
2043(Header)X
2372(Field)X
1 f
720 2960(In)N
853(the)X
1024(discussions)X
1514(of)X
1647(earlier)X
1947(drafts)X
2219(of)X
2352(this)X
2544(memo,)X
2863(some)X
3120(people)X
3431(indicated)X
3839(a)X
3936(strong)X
720 3072(preference)N
1194(for)X
1373(using)X
1648(a)X
1758(size-counting)X
2344(scheme)X
2700(to)X
2842(delimit)X
3183(the)X
3367(boundaries)X
3855(between)X
720 3184(encapsulated)N
1252(parts)X
1473(of)X
1587(multipart)X
1975(messages.)X
2420(This)X
2625(was)X
2808(rejected)X
3148(because)X
3487(such)X
3697(schemes)X
4058(are)X
720 3296(not,)N
904(in)X
1015(general,)X
1359(suf\256ciently)X
1828(robust)X
2104(across)X
2380(the)X
2534(SMTP)X
2820(transport)X
3198(layer.)X
3475(For)X
3644(example,)X
4031(line)X
720 3408(counts)N
1007(can)X
1178(be)X
1306(altered)X
1606(by)X
1739(line-wrapping)X
2316(MTA's,)X
2659(and)X
2835(byte)X
3038(counts)X
3326(can)X
3497(be)X
3625(altered)X
3925(in)X
4037(any)X
720 3520(number)N
1050(of)X
1166(ways,)X
1423(and)X
1598(may)X
1800(be)X
1927(confused)X
2309(by)X
2440(crossing)X
2795(boundaries)X
3252(in)X
3362(which)X
3632(the)X
3785(size)X
3970(of)X
4085(an)X
720 3632(end-of-line)N
1177(marker)X
1479(changes.)X
1866(However,)X
2272(there)X
2495(are)X
2643(restricted)X
3032(environments)X
3586(in)X
3691(which)X
3956(either)X
720 3744(or)N
828(both)X
1027(of)X
1135(these)X
1361(counts)X
1640(can)X
1802(be)X
1921(relied)X
2169(upon,)X
2413(and)X
2580(in)X
2682(such)X
2885(environments)X
3436(it)X
3517(may)X
3710(be)X
3828(desirable)X
720 3856(to)N
837(implement)X
1292(a)X
1377(count-based)X
1884(approach)X
2279(to)X
2396(delimiters.)X
2872(Therefore)X
3294(this)X
3475(memo)X
3759(speci\256es)X
4133(a)X
720 3968(conventional)N
1247(way)X
1436(to)X
1539(do)X
1663(this,)X
1854(in)X
1957(order)X
2188(to)X
2291(promote)X
2640 0.2083(interoperability)AX
3263(among)X
3553(systems)X
3885(that)X
4058(are)X
720 4080(able)N
905(to)X
1004(take)X
1189(this)X
1352(approach.)X
720 4304(In)N
838(such)X
1052(cases,)X
1317(boundary)X
1718(delimiters,)X
2166(as)X
2284(de\256ned)X
2605(above,)X
2897(are)X
3053(still)X
3236(required.)X
3643(However,)X
4058(the)X
720 4416(header)N
1008(area)X
1200(of)X
1311(an)X
1433(encapsulated)X
1962(part)X
2143(may)X
2340(include)X
2654(an)X
2775(optional)X
3121(Content-Size)X
3654(header)X
3941(which)X
720 4528(indicates)N
1091(where)X
1354(the)X
1500(encapsulated)X
2026(part)X
2204(ends,)X
2432(if)X
2519(its)X
2638(size)X
2816(has)X
2973(not)X
3125(been)X
3336(altered.)X
3652(The)X
3831(size)X
4010(may)X
720 4640(be)N
837(measured)X
1232(in)X
1333(either)X
1579(bytes)X
1808(or)X
1913(lines.)X
2168(Those)X
2428(who)X
2618(use)X
2771(the)X
2914(Content-Size)X
3442(header)X
3724(\256eld)X
3920(should)X
720 4752(still)N
902(preserve)X
1265(the)X
1420(encapsulation)X
1987(boundaries,)X
2471(and)X
2648(should)X
2942(recognize)X
3355(that)X
3538(other)X
3774(agents)X
4058(are)X
720 4864(free)N
894(to)X
993(ignore)X
1263(it)X
1341(in)X
1440(favor)X
1667(of)X
1771(complete)X
2149(reliance)X
2479(on)X
2599(encapsulation)X
3153(boundaries.)X
720 5088(It)N
805(should)X
1087(also)X
1268(be)X
1385(noted)X
1625(that)X
1796(those)X
2025(who)X
2217(wish)X
2425(to)X
2527(use)X
2682(the)X
2827(Content-Size)X
3357(mechanism)X
3823(have)X
4032(two)X
720 5200(rather)N
971(different)X
1329(possible)X
1670(motivations.)X
2199(One)X
2385(is)X
2475(to)X
2575(\256nd)X
2749(the)X
2892(end)X
3056(of)X
3161(the)X
3304(data)X
3490(as)X
3595(represented)X
4064(for)X
720 5312(mail)N
931(transport,)X
1336(an)X
1466(enterprise)X
1885(which,)X
2183(as)X
2302(noted)X
2555(above,)X
2848(can)X
3021(be)X
3151(counted)X
3495(on)X
3631(to)X
3746(provide)X
4080(no)X
720 5424(better)N
972(than)X
1169(an)X
1291(estimate.)X
1692(The)X
1873(other)X
2102(is)X
2197(to)X
2303(declare)X
2613(the)X
2762(initial)X
3019(size)X
3200(of)X
3311(the)X
3460(object)X
3727(before)X
4004(mail)X
720 5536(transport,)N
1118(to)X
1225(be)X
1348(used)X
1557(as)X
1670(a)X
1746(check)X
2004(on)X
2133(the)X
2284(integrity)X
2644(of)X
2757(the)X
2908(data.)X
3150(Accordingly,)X
3688(the)X
3839(Content-)X
720 5648(Size)N
914(header)X
1199(\256eld)X
1398(allows)X
1677(the)X
1823(sender)X
2102(to)X
2205(distinguish)X
2655(whether)X
2992(he)X
3110(is)X
3201(measuring)X
3629(the)X
3774(size)X
3951(of)X
4058(the)X
720 5760(original)N
1044(object)X
1304(or)X
1408(its)X
1523(encoded)X
1868(form.)X

17 p
%%Page: 17 17
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(17)X
2520(-)X
720 688(The)N
894(Content-Size)X
1421(header)X
1702(\256eld)X
1897(is)X
1985(de\256ned)X
2292(as)X
2396(follows:)X
7 f
720 912 0.4091(Content-Size)AN
1474(:=)X
1648(1*DIGIT)X
2112(unit)X
2402(when)X
720 1136(unit)N
1010(:=)X
1184("lines")X
1648(/)X
1764("bytes")X
2228(/)X
2344("bits")X
720 1360(when)N
1010(:=)X
1184 0.4167("original")AX
1822(/)X
1938 0.4219("encoded")AX
1 f
720 1584(Note)N
948(that)X
1134(each)X
1352(encapsulated)X
1891(part)X
2082(should)X
2379(still)X
2566(end)X
2747(with)X
2960(an)X
3093(end-of-line)X
3563(followed)X
3947(by)X
4085(an)X
720 1696(encapsulation)N
1287(boundary.)X
1735(However,)X
2148(a)X
2228(message)X
2591(store)X
2815(that)X
2997(wishes,)X
3319(for)X
3468(example,)X
3856(to)X
3968(use)X
4133(a)X
720 1808(storage)N
1029(format)X
1318(that)X
1495(is)X
1591(largely)X
1891(RFC)X
2104(822-compliant,)X
2722(but)X
2877(includes)X
3230(binary)X
3508(storage)X
3818(of)X
3930(binary)X
720 1920(objects,)N
1045(can)X
1207(use)X
1363(the)X
1509(Content-Size)X
2039(header)X
2323(\256eld)X
2521(to)X
2623(indicate)X
2956(whether)X
3293(or)X
3400(not)X
3550(the)X
3695(\256nal)X
3893(end-of-)X
720 2032(line)N
889(is)X
977(to)X
1076(be)X
1191(interpreted)X
1633(as)X
1738(part)X
1913(of)X
2018(the)X
2161(binary)X
2432(object.)X
2741(If)X
2830(the)X
2973(end-of-line)X
3426(follows)X
3739(the)X
3882(number)X
720 2144(of)N
824(bytes)X
1051(speci\256ed)X
1417(for)X
1553(the)X
1695(encapsulation,)X
2273(then)X
2463(it)X
2541(is)X
2629(not)X
2776(part)X
2950(of)X
3054(the)X
3196(encapsulation.)X
720 2368(The)N
904(size)X
1088(given)X
1336(by)X
1466(the)X
1618(Content-Size)X
2155(header)X
2446(\256eld)X
2651(is)X
2749(the)X
2901(size)X
3085(of)X
3199(the)X
3351(encapsulation's)X
3984(body)X
720 2480(only,)N
940(not)X
1088(counting)X
1450(the)X
1593(blank)X
1832(line)X
2002(that)X
2172(separates)X
2550(the)X
2693(header)X
2975(from)X
3186(the)X
3328(body.)X
3592(In)X
3696(other)X
3918(words,)X
720 2592(the)N
867(four)X
1056(bytes)X
1288(CRLF)X
1557(CRLF,)X
1850(which)X
2114(separate)X
2459(header)X
2745(from)X
2961(body,)X
3206(are)X
3354(NOT)X
3581(counted)X
3916(as)X
4026(part)X
720 2704(of)N
824(the)X
966(content-size.)X

18 p
%%Page: 18 18
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(18)X
2520(-)X
3 f
14 s
720 704(5)N
1104(The)X
1318(Nine)X
1570(Prede\256ned)X
2114(Content-type)X
2773(Values)X
1 f
12 s
720 944(This)N
936(memo)X
1222(de\256nes)X
1539(nine)X
1750(initial)X
2022(content-type)X
2550(values)X
2842(and)X
3027(an)X
3164(extension)X
3579(mechanism)X
4064(for)X
720 1056(private)N
1026(or)X
1144(experimental)X
1686(types.)X
1975(Further)X
2296(types)X
2537(must)X
2762(be)X
2891(de\256ned)X
3212(and)X
3389(published)X
3801(by)X
3935(a)X
4016(new)X
720 1168(RFC.)N
976(It)X
1062(is)X
1153(expected)X
1523(that)X
1695(most)X
1909(innovation)X
2349(in)X
2452(new)X
2640(types)X
2871(of)X
2979(mail)X
3203(take)X
3392(place)X
3624(as)X
3732(subtypes)X
4096(of)X
720 1280(the)N
862(nine)X
1052(types)X
1279(de\256ned)X
1586(here.)X
3 f
720 1504(5.1)N
1104(The)X
1288(TEXT)X
1573(Content-type)X
2135(and)X
2313(the)X
2465(US-ASCII)X
2908(Character)X
3354(Set)X
1 f
720 1728(The)N
895(text)X
1065(content-type)X
1572(is)X
1661(intended)X
2018(for)X
2155(sending)X
2479(textual)X
2768(email.)X
3057(It)X
3142(is)X
3232(the)X
3376(default)X
3670(content-type.)X
720 1840(Subtype)N
1070(names)X
1351(are)X
1504(used,)X
1739(for)X
1886(text,)X
2090(to)X
2200(indicate)X
2541(character)X
2930(sets.)X
3157(In)X
3272(keeping)X
3612(with)X
3817(historical)X
720 1952(practice)N
1066(and)X
1245(expectations,)X
1792(the)X
1951(default)X
2260(content-type)X
2783(for)X
2936(internet)X
3272(mail)X
3485(is)X
3590("text",)X
3878(and)X
4058(the)X
720 2064(default)N
1046(subtype)X
1402(\(character)X
1845(set\))X
2041(is)X
2162(unspeci\256ed.)X
2705(This)X
2933(content-type)X
3472(can)X
3663(be)X
3811(explicitly)X
720 2176(speci\256ed)N
1089(as)X
1196("text",)X
1471(and)X
1638(the)X
1784(character)X
2166(set)X
2301(that)X
2474(many)X
2716(people)X
3001(seem)X
3227(to)X
2 f
3330(think)X
3551(of)X
1 f
3654(as)X
3762(the)X
3908(default)X
720 2288(can)N
886(be)X
1009(speci\256ed)X
1383(as)X
1494("US-ASCII".)X
2055(However,)X
2462(it)X
2547(must)X
2765(be)X
2887(noted)X
3132(that)X
3308(because)X
3644(of)X
3755(the)X
3904(lack)X
4096(of)X
720 2400(character)N
1101(set)X
1235(speci\256cation)X
1749(in)X
1852(RFC)X
2061(822,)X
2257(nothing)X
2579(can)X
2741(be)X
2860(assumed)X
3219(about)X
3461(mail)X
3661(with)X
3860(content-)X
720 2512(type)N
910("text")X
1157(but)X
1304(no)X
1424(character)X
1802(set)X
1933(speci\256cation.)X
720 2736(Alternately,)N
1212(a)X
1290(different)X
1657(character)X
2046(set)X
2188(subtype)X
2522(may)X
2723(be)X
2849(speci\256ed,)X
3250(in)X
3360(which)X
3630(case)X
3831(the)X
3984(body)X
720 2848(text)N
899(is)X
997(in)X
1106(the)X
1258(speci\256ed)X
1634(character)X
2022(set.)X
2211(A)X
2314(recommended)X
2894(list)X
3046(of)X
3159(prede\256ned)X
3598(subtype)X
3930(names)X
720 2960(can)N
880(be)X
997(found)X
1247(at)X
1343(the)X
1487(end)X
1653(of)X
1760(this)X
1926(appendix.)X
2354(Note)X
2568(that)X
2740(if)X
2826(the)X
2971(speci\256ed)X
3340(character)X
3721(set)X
3855(includes)X
720 3072(8-bit)N
931(data,)X
1145(the)X
1292(Content-TransferEncoding)X
2352(header)X
2637(\256eld)X
2836(is)X
2928(required)X
3277(in)X
3380(order)X
3611(to)X
3714(transmit)X
4058(the)X
720 3184(message)N
1070(via)X
1212(SMTP.)X
720 3408(The)N
921(default)X
1241(character)X
1647(set,)X
1830(US-ASCII,)X
2310(has)X
2490(been)X
2724(the)X
2894(subject)X
3219(of)X
3351(some)X
3606(confusion)X
4037(and)X
720 3520(ambiguity)N
1137(in)X
1238(the)X
1382(past.)X
1611(Not)X
1781(only)X
1978(were)X
2191(there)X
2410(some)X
2639(ambiguities)X
3115(in)X
3215(the)X
3358(de\256nition,)X
3776(there)X
3994(have)X
720 3632(been)N
934(wide)X
1153(variations)X
1565(in)X
1673(practice.)X
2060(In)X
2173(order)X
2409(to)X
2517(elminate)X
2883(such)X
3092(ambiguity)X
3516(and)X
3688(variations)X
4101(in)X
720 3744(the)N
866(future,)X
1148(it)X
1230(is)X
1321(strongly)X
1663(recommended)X
2236(that)X
2408(new)X
2595(user)X
2782(agents)X
3055(explicitly)X
3447(specify)X
3752(a)X
3822(character)X
720 3856(set)N
851(via)X
993(the)X
1135(content-type)X
1641(header)X
1922(\256eld.)X
720 4080(The)N
916(US-ASCII)X
1366(character)X
1766(set)X
1919(is)X
2029(based)X
2294(on)X
2436(a)X
2525(series)X
2790(of)X
2916(standards)X
3325(and)X
3510(on)X
3652(the)X
3817(historical)X
720 4192(standard)N
1076(practice)X
1412(in)X
1517(the)X
1665(Internet)X
1995(mail)X
2197(community.)X
2713(However,)X
3118(the)X
3265(precise)X
3567(meaning)X
3928(of)X
4037(this)X
720 4304(character)N
1102(set)X
1237(has)X
1393(been)X
1603(the)X
1749(subject)X
2050(of)X
2158(some)X
2389(debate.)X
2717(In)X
2825(this)X
2993(appendix,)X
3399(therefore,)X
3800(we)X
3941(de\256ne)X
720 4416(the)N
862(US-ASCII)X
1290(character)X
1668(set.)X
720 4640(The)N
925(message)X
1306(body)X
1553(is)X
1672(coded)X
1957(in)X
2088(the)X
2262(character)X
2672(set)X
2835(of)X
2971(American)X
3407(Standard)X
3805(Code)X
4064(for)X
720 4752(Information)N
1221(Interchange,)X
1741(sometimes)X
2194(known)X
2496(as)X
2617("7-bit)X
2879(ASCII".)X
3233(This)X
3445(is)X
3550(not)X
3713(an)X
3844(arbitrary)X
720 4864(seven-bit)N
1103(character)X
1487(code,)X
1724(but)X
1878(indicates)X
2252(that)X
2428(the)X
2577(message)X
2934(body)X
3157(uses)X
3353(character)X
3738(coding)X
4031(that)X
720 4976(uses)N
921(the)X
1075(exact)X
1315(correspondence)X
1955(of)X
2071(codes)X
2325(to)X
2435(characters)X
2861(speci\256ed)X
3238(in)X
3348(ASCII.)X
3681(National)X
4048(use)X
720 5088(variations)N
1145(of)X
1270(ISO646)X
1613([REF-ISO646])X
2228(are)X
2391(not)X
2559(ASCII,)X
2878(and)X
3062(neither)X
3375(an)X
3512(explicit)X
3848("ASCII")X
720 5200(character)N
1111(set,)X
1279(nor)X
1444("US-ASCII",)X
1987(nor)X
2152(the)X
2307(default)X
2612(\(omission)X
3028(of)X
3145(a)X
3225(character)X
3616(set\))X
3792(should)X
4085(be)X
720 5312(used)N
947(when)X
1207(characters)X
1650(are)X
1820(coded)X
2102(using)X
2362(them.)X
2679(\(Discussion:)X
3211(RFC821)X
3588(very)X
3811(explicitly)X
720 5424(speci\256es)N
1086("ASCII",)X
1473(and)X
1646(references)X
2100(an)X
2225(earlier)X
2506(version)X
2823(of)X
2937(the)X
3089(American)X
3503(Standard)X
3879(cited)X
4101(in)X
720 5536([REF-ANSI].)N
1310(Whether)X
1689(that)X
1881(speci\256cation,)X
2439(rather)X
2711(than)X
2924(a)X
3014(reference)X
3421(to)X
3544(an)X
3683(International)X
720 5648(Standard,)N
1140(was)X
1343(done)X
1584(deliberately)X
2094(or)X
2228(out)X
2405(of)X
2539(convenience)X
3074(or)X
3207(ignorance,)X
3664(is)X
3781(no)X
3930(longer)X
720 5760(interesting:)N
1184(insofar)X
1481(as)X
1591(one)X
1760(of)X
1870(the)X
2018(purposes)X
2389(of)X
2499(specifying)X
2930(a)X
3003(content-type)X
3515(and)X
3684(character)X
4069(set)X

19 p
%%Page: 19 19
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(19)X
2520(-)X
720 688(is)N
813(to)X
917(permit)X
1198(the)X
1345(receiver)X
1684(to)X
1787(unambiguously)X
2408(determine)X
2822(how)X
3015(the)X
3161(sender)X
3440(intended)X
3800(the)X
3946(coded)X
720 800(message)N
1085(to)X
1199(be)X
1329(interpreted,)X
1810(assuming)X
2212(anything)X
2588(other)X
2825(than)X
3030("strict)X
3301(ASCII")X
3630(as)X
3750(the)X
3908(default)X
720 912(would)N
999(risk)X
1182(unintentional)X
1730(and)X
1908(incompatible)X
2451(changes)X
2800(to)X
2914(the)X
3071(semantics)X
3490(of)X
3609(messages)X
4011(now)X
720 1024(being)N
959(transmitted.)X
1442(This)X
1639(also)X
1820(implies)X
2130(that)X
2301(messages)X
2690(containing)X
3123(characters)X
3540(coded)X
3796(according)X
720 1136(to)N
841(national)X
1197(variations)X
1622(on)X
1763(ISO646,)X
2130(or)X
2255(using)X
2508(code-switching)X
3141(procedures)X
3608(\(e.g.,)X
3848(those)X
4096(of)X
720 1248(ISO2022\),)N
1180(as)X
1318(well)X
1542(as)X
1680(8-bit)X
1920(or)X
2059(multiple)X
2464(octet)X
2711(character)X
3124(encodings)X
3573(MUST)X
3898(use)X
4085(an)X
720 1360(appropriate)N
1183(character)X
1561(set)X
1692(speci\256cation)X
2203(to)X
2302(be)X
2417(consistent)X
2826(with)X
3021(this)X
3184(speci\256cation.\))X
720 1584(The)N
894(complete)X
1272(US-ASCII)X
1700(character)X
2078(set)X
2209(is)X
2297(listed)X
2530(below:)X
7 f
10 s
768 1792(0)N
864(nul)X
1104(16)X
1248(dle)X
1488(32)X
1632(sp)X
1872(48)X
2064(0)X
2256(64)X
2448(@)X
2640(80)X
2832(P)X
3072(96)X
3264(`)X
3456(112)X
3696(p)X
768 1888(1)N
864(soh)X
1104(17)X
1248(dc1)X
1488(33)X
1680(!)X
1872(49)X
2064(1)X
2256(65)X
2448(A)X
2640(81)X
2832(Q)X
3072(97)X
3264(a)X
3456(113)X
3696(q)X
768 1984(2)N
864(stx)X
1104(18)X
1248(dc2)X
1488(34)X
1680(")X
1872(50)X
2064(2)X
2256(66)X
2448(B)X
2640(82)X
2832(R)X
3072(98)X
3264(b)X
3456(114)X
3696(r)X
768 2080(3)N
864(etx)X
1104(19)X
1248(dc3)X
1488(35)X
1680(#)X
1872(51)X
2064(3)X
2256(67)X
2448(C)X
2640(83)X
2832(S)X
3072(99)X
3264(c)X
3456(115)X
3696(s)X
768 2176(4)N
864(eot)X
1104(20)X
1248(dc4)X
1488(36)X
1680($)X
1872(52)X
2064(4)X
2256(68)X
2448(D)X
2640(84)X
2832(T)X
3024(100)X
3264(d)X
3456(116)X
3696(t)X
768 2272(5)N
864(enq)X
1104(21)X
1248(nak)X
1488(37)X
1680(%)X
1872(53)X
2064(5)X
2256(69)X
2448(E)X
2640(85)X
2832(U)X
3024(101)X
3264(e)X
3456(117)X
3696(u)X
768 2368(6)N
864(ack)X
1104(22)X
1248(syn)X
1488(38)X
1680(&)X
1872(54)X
2064(6)X
2256(70)X
2448(F)X
2640(86)X
2832(V)X
3024(102)X
3264(f)X
3456(118)X
3696(v)X
768 2464(7)N
864(bel)X
1104(23)X
1248(etb)X
1488(39)X
1680(')X
1872(55)X
2064(7)X
2256(71)X
2448(G)X
2640(87)X
2832(W)X
3024(103)X
3264(g)X
3456(119)X
3696(w)X
768 2560(8)N
864(bs)X
1104(24)X
1248(can)X
1488(40)X
1680(\()X
1872(56)X
2064(8)X
2256(72)X
2448(H)X
2640(88)X
2832(X)X
3024(104)X
3264(h)X
3456(120)X
3696(x)X
768 2656(9)N
864(ht)X
1104(25)X
1248(em)X
1488(41)X
1680(\))X
1872(57)X
2064(9)X
2256(73)X
2448(I)X
2640(89)X
2832(Y)X
3024(105)X
3264(i)X
3456(121)X
3696(y)X
720 2752(10)N
864(lf)X
1104(26)X
1248(sub)X
1488(42)X
1680(*)X
1872(58)X
2064(:)X
2256(74)X
2448(J)X
2640(90)X
2832(Z)X
3024(106)X
3264(j)X
3456(122)X
3696(z)X
720 2848(11)N
864(vt)X
1104(27)X
1248(esc)X
1488(43)X
1680(+)X
1872(59)X
2064(;)X
2256(75)X
2448(K)X
2640(91)X
2832([)X
3024(107)X
3264(k)X
3456(123)X
3696({)X
720 2944(12)N
864(np)X
1104(28)X
1248(fs)X
1488(44)X
1680(,)X
1872(60)X
2064(<)X
2256(76)X
2448(L)X
2640(92)X
2832(\\)X
3024(108)X
3264(l)X
3456(124)X
3696(|)X
720 3040(13)N
864(cr)X
1104(29)X
1248(gs)X
1488(45)X
1680(-)X
1872(61)X
2064(=)X
2256(77)X
2448(M)X
2640(93)X
2832(])X
3024(109)X
3264(m)X
3456(125)X
3696(})X
720 3136(14)N
864(so)X
1104(30)X
1248(rs)X
1488(46)X
1680(.)X
1872(62)X
2064(>)X
2256(78)X
2448(N)X
2640(94)X
2832(\303)X
3024(110)X
3264(n)X
3456(126)X
3696(\304)X
720 3232(15)N
864(si)X
1104(31)X
1248(us)X
1488(47)X
1680(/)X
1872(63)X
2064(?)X
2256(79)X
2448(O)X
2640(95)X
2832(_)X
3024(111)X
3264(o)X
3456(127)X
3648(del)X
1 f
12 s
720 3440(Beyond)N
1044(US-ASCII,)X
1497(one)X
1661(can)X
1820(imagine)X
2156(an)X
2272(enormous)X
2676(proliferation)X
3183(of)X
3288(character)X
3667(sets.)X
3884(It)X
3968(is)X
4058(the)X
720 3552(opinion)N
1042(of)X
1150(the)X
1296(authors)X
1607(of)X
1715(this)X
1882(memo)X
2151(that)X
2324(a)X
2395(large)X
2616(number)X
2938(of)X
3046(character)X
3428(sets)X
3599(is)X
3690(NOT)X
3914(a)X
3984(good)X
720 3664(thing.)N
994(We)X
1156(would)X
1425(prefer)X
1684(to)X
1788(specify)X
2095(a)X
2167(single)X
2426(character)X
2809(set)X
2945(that)X
3119(can)X
3282(be)X
3402(used)X
3607(universally)X
4064(for)X
720 3776(representing)N
1231(all)X
1363(of)X
1478(the)X
1631(world's)X
1959(languages)X
2379(in)X
2488(electronic)X
2903(mail.)X
3157(Unfortunately,)X
3755(there)X
3982(is)X
4080(no)X
720 3888(clear)N
968(choice)X
1280(for)X
1452(such)X
1688(a)X
1791(universal)X
2204(representation,)X
2834(and)X
3034(existing)X
3400(practice)X
3767(in)X
3903(several)X
720 4000(communities)N
1251(seems)X
1519(to)X
1627(point)X
1858(to)X
1966(the)X
2117(continuing)X
2562(use)X
2723(of)X
2836(multiple)X
3191(character)X
3577(sets)X
3753(in)X
3860(the)X
4010(near)X
720 4112(future.)N
1023(For)X
1181(this)X
1345(reason,)X
1645(we)X
1783(de\256ne)X
2044(names)X
2316(for)X
2454(a)X
2523(small)X
2758(number)X
3078(of)X
3184(character)X
3564(sets)X
3734(for)X
3872(which)X
4133(a)X
720 4224(strong)N
984(consituent)X
1404(base)X
1599(exists.)X
1890(We)X
2048(recommend)X
2527(the)X
2669(use)X
2821(of)X
2925(ISO-10646)X
3375(wherever)X
3757(possible.)X
720 4448(The)N
894(de\256ned)X
1201(subtypes)X
1561(of)X
1665(text,)X
1858(which)X
2117(name)X
2350(alternate)X
2707(character)X
3085(sets,)X
3277(are:)X
720 4672(US-ASCII)N
1148(--)X
1236(as)X
1340(de\256ned)X
1647(above.)X
720 4896(ISO-10646)N
1170(--)X
1258(as)X
1362(de\256ned)X
1669(in)X
1768([REF-ISO-10646])X
720 5120(ISO-8859-X)N
1226(--)X
1317(where)X
1580("X")X
1755(is)X
1847(to)X
1950(be)X
2069(replaced,)X
2448(as)X
2556(necessary,)X
2982(for)X
3122(the)X
3268(national)X
3607(use)X
3763(variants)X
4096(of)X
720 5232(ISO-8859)N
1122([REF-ISO-8859])X
720 5456(ISO-2022)N
1122(--)X
1210(as)X
1314(de\256ned)X
1621(in)X
1720([REF-ISO-2022])X

20 p
%%Page: 20 20
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(20)X
2520(-)X
720 688(In)N
844(the)X
1006(opinion)X
1344(of)X
1468(the)X
1630(authors,)X
1981(this)X
2164(is)X
2272(already)X
2600(far)X
2751(more)X
2994(character)X
3393(sets)X
3582(than)X
3793(are)X
3956(really)X
720 800(desirable,)N
1128(and)X
1303(implementors)X
1869(are)X
2023(discouraged)X
2524(from)X
2747(de\256ning)X
3098(new)X
3294(ones)X
3505(unless)X
3780(absolutely)X
720 912(necessary.)N
720 1136(*****)N
1016(I)X
1104(AM)X
1314(SURE)X
1615(THAT)X
1927(I)X
2015(NEED)X
2327(SOME)X
2649(FLESHING)X
3169(OUT)X
3423(OF)X
3602(THE)X
3846(ABOVE)X
720 1248(DEFINITIONS)N
1340(&)X
1439(REFERENCES)X

21 p
%%Page: 21 21
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(21)X
2520(-)X
3 f
720 688(5.2)N
1104(The)X
1288("Multipart")X
1824(Content-Type)X
1 f
720 912(In)N
832(the)X
982(case)X
1180(of)X
1292(multiple)X
1646(part)X
1828(messages,)X
2247(a)X
2322("multipart")X
2786(Content-type)X
3321(\256eld)X
3524(should)X
3812(appear)X
4101(in)X
720 1024(the)N
877(RFC)X
1097(822)X
1279(message)X
1643(header.)X
1962(The)X
2150(message)X
2514(body)X
2744(is)X
2846(then)X
3050(assumed)X
3419(to)X
3532(contain)X
3854(multiple)X
720 1136(parts)N
938(separated)X
1333(by)X
1460(encapsulation)X
2021(boundaries.)X
2523(Each)X
2748(of)X
2860(the)X
3010(parts)X
3229(is)X
3325(de\256ned,)X
3664(syntactically,)X
720 1248(as)N
847(a)X
937(complete)X
1338(RFC)X
1566(822)X
1757(message)X
2130(in)X
2252(miniature.)X
2717(That)X
2941(is,)X
3076(what)X
3310(is)X
3421(found)X
3691(between)X
4058(the)X
720 1360(encapsulation)N
1282(boundaries)X
1737(is)X
1834(a)X
1910(header)X
2200(area,)X
2418(a)X
2494(blank)X
2741(line,)X
2943(and)X
3115(a)X
3191(body)X
3416(area,)X
3634(in)X
3742(accordance)X
720 1472(with)N
920(the)X
1067(RFC)X
1277(822)X
1450(syntax)X
1730(for)X
1871(a)X
1943(message.)X
2346(However)X
2727(body)X
2948(parts)X
3164(are)X
3311(NOT)X
3536(to)X
3639(be)X
3758(interpreted)X
720 1584(as)N
844(actually)X
1194(being)X
1452(RFC)X
1677(822)X
1865(messages.)X
2320(To)X
2471(begin)X
2729(with,)X
2969(NO)X
3152(header)X
3454(\256elds)X
3707(are)X
3870(actually)X
720 1696(required)N
1068(in)X
1170(body)X
1389(parts.)X
1651(A)X
1747(body)X
1966(part)X
2143(that)X
2315(starts)X
2545(with)X
2743(a)X
2813(blank)X
3054(line,)X
3250(therefore,)X
3649(is)X
3739(a)X
3808(body)X
4026(part)X
720 1808(for)N
856(which)X
1115(all)X
1236(default)X
1528(values)X
1798(are)X
1941(to)X
2041(be)X
2157(assumed.)X
2561(In)X
2666(such)X
2867(a)X
2935(case,)X
3150(of)X
3255(course,)X
3555(the)X
3698(absence)X
4028(of)X
4133(a)X
720 1920(Content-type)N
1266(header)X
1566(\256eld)X
1780(implies)X
2107(that)X
2294(the)X
2454(encapsulation)X
3026(is)X
3132(US-ASCII)X
3578(text.)X
3813(The)X
4005(only)X
720 2032(header)N
1017(\256elds)X
1265(that)X
1450(have)X
1672(de\256ned)X
1995(meaning)X
2367(for)X
2519(body-parts)X
2971(are)X
3130(those)X
3374(the)X
3533(names)X
3820(of)X
3941(which)X
720 2144(begin)N
965(with)X
1167("Content-".)X
1661(All)X
1815(other)X
2044(header)X
2332(\256elds)X
2571(are)X
2720(to)X
2826(be)X
2947(ignored)X
3271(in)X
3376(body-parts,)X
3841(and)X
4010(may)X
720 2256(be)N
843(discarded)X
1244(by)X
1373(gateways.)X
1812(They)X
2043(are)X
2194(permitted)X
2597(to)X
2705(appear)X
2995(in)X
3103(body)X
3328(parts)X
3548(only)X
3752(for)X
3897(ease)X
4096(of)X
720 2368(conversion)N
1166(between)X
1511(messages)X
1898(and)X
2061(body)X
2277(parts.)X
720 2592(It)N
824(must)X
1056(be)X
1192(understood)X
1664(that)X
1855(body)X
2093(parts)X
2326(are)X
2490(NOT)X
2733(messages.)X
3190(For)X
3369(example,)X
3766(a)X
3855(gateway)X
720 2704(between)N
1070(Internet)X
1399(and)X
1567(X.400)X
1833(mail)X
2034(must)X
2250(be)X
2370(able)X
2560(to)X
2664(tell)X
2817(the)X
2964(difference)X
3384(between)X
3734(a)X
3806(body)X
4026(part)X
720 2816(that)N
900(consists)X
1239(of)X
1354(an)X
1480(image)X
1751(and)X
1925(a)X
2003(bodypart)X
2380(that)X
2560(consists)X
2899(of)X
3014(an)X
3140(encapsulated)X
3673(message,)X
4058(the)X
720 2928(body)N
947(of)X
1062(which)X
1332(is)X
1431(an)X
1557(image.)X
1876(In)X
1991(order)X
2229(to)X
2339(represent)X
2727(the)X
2880(latter,)X
3138(the)X
3291(body)X
3518(part)X
3703(should)X
3994(have)X
720 3040("Content-type:)N
1321(message",)X
1743(and)X
1915(its)X
2039(body)X
2264(\(after)X
2506(the)X
2657(blank)X
2904(line\))X
3114(should)X
3403(be)X
3527(the)X
3678(encapsulated)X
720 3152(message,)N
1114(with)X
1329(its)X
1464(own)X
1673("Content-type:)X
2285(image")X
2603(header)X
2903(\256eld.)X
3165(Body)X
3416(parts)X
3646(use)X
3817(the)X
3978(same)X
720 3264(syntax)N
1001(as)X
1111(messages)X
1504(because)X
1839(there)X
2062(are)X
2210(many)X
2454(legitimate)X
2871(cases)X
3104(in)X
3209(which)X
3474(a)X
3547(body)X
3770(part)X
3951(might)X
720 3376(be)N
837(converted)X
1243(into)X
1419(a)X
1488(message,)X
1864(or)X
1970(vice)X
2157(versa.)X
2434(The)X
2610(identical)X
2969(syntax)X
3245(makes)X
3516(such)X
3717(conversions)X
720 3488(easy,)N
947(but)X
1102(must)X
1321(be)X
1444(understood)X
1903(by)X
2031(implementors.)X
2641(\(For)X
2838(the)X
2988(special)X
3288(case)X
3486(in)X
3593(which)X
3860(all)X
3989(parts)X
720 3600(are)N
862(actually)X
1192(messages,)X
1603(a)X
1670("digest")X
2002(subtype)X
2325(is)X
2413(also)X
2592(de\256ned.\))X
720 3824(As)N
891(stated)X
1181(previously,)X
1676(each)X
1918(pair)X
2133(of)X
2278(consecutive)X
2798(body)X
3056(parts)X
3309(are)X
3493(separated)X
3923(by)X
4085(an)X
720 3936(encapsulation)N
1281(boundary.)X
1723(The)X
1904(encapsulation)X
2464(boundary)X
2857(MUST)X
3153(NOT)X
3380(appear)X
3667(inside)X
3927(any)X
4096(of)X
720 4048(the)N
863(encapsulated)X
1386(parts.)X
1646(Thus,)X
1887(it)X
1966(is)X
2055(crucial)X
2343(that)X
2513(the)X
2656(composing)X
3104(agent)X
3339(be)X
3456(able)X
3643(to)X
3744(choose)X
4037(and)X
720 4160(specify)N
1022(the)X
1164(boundary)X
1551(that)X
1720(will)X
1894(separate)X
2234(the)X
2376(parts.)X
720 4384(The)N
907(Content-type)X
1447(\256eld)X
1655(for)X
1804(multipart)X
2220(messages)X
2621(requires)X
2969(two)X
3151(supplementary)X
3756(\256elds.)X
4026(The)X
720 4496(\256rst)N
901(is)X
997(used)X
1205(to)X
1312(specify)X
1622(a)X
1697(version)X
2012(number)X
2338(and)X
2509(should)X
2797(be)X
2920(either)X
3172("1-S")X
3415(and)X
3585("1-P".)X
3851(The)X
4032(two)X
720 4608(versions)N
1075(have)X
1293(identical)X
1662(syntax,)X
1973(but)X
2132(the)X
2286("-P")X
2485(is)X
2585(intended)X
2953(as)X
3069(a)X
3148(hint,)X
3358(to)X
3469(receivers,)X
3877(that)X
4058(the)X
720 4720(parts)N
931(are)X
1073(intended)X
1429(to)X
1528(be)X
1643(viewed)X
1945(in)X
2044(parallel)X
2358(rather)X
2607(than)X
2797(sequentially.)X
3359(Implementations)X
4031(that)X
720 4832(can)N
898(not)X
1065(show)X
1311(the)X
1473(parts)X
1704(in)X
1823(parallel,)X
2181(or)X
2305(that)X
2494(choose)X
2805(not)X
2972(to)X
3091(do)X
3231(so,)X
3384(are)X
3547(free)X
3742(to)X
3862(treat)X
4079(all)X
720 4944(multipart)N
1129(messages)X
1547(of)X
1682(version)X
2020("1-P")X
2286(as)X
2421(if)X
2535(they)X
2756(were)X
2998(version)X
3336("1-S".)X
3649(However,)X
4079(all)X
720 5056(implementations)N
1403(should)X
1699(check)X
1964(the)X
2122(version)X
2445(number,)X
2803(to)X
2918(ensure)X
3209(graceful)X
3565(behavior)X
3942(in)X
4058(the)X
720 5168(event)N
953(that)X
1122(an)X
1237(incompatible)X
1765(future)X
2019(version)X
2326(of)X
2430(multipart)X
2808(messages)X
3195(is)X
3283(de\256ned)X
3590(later.)X
720 5392(The)N
894(second)X
1185(supplementary)X
1776(\256eld,)X
1996(which)X
2256(is)X
2345(always)X
2637(required)X
2983(for)X
3120(multipart)X
3499(messages,)X
3911(is)X
4000(used)X
720 5504(to)N
839(specify)X
1161(the)X
1323(format)X
1624(of)X
1748(the)X
1910(encapsulation)X
2484(boundary.)X
2939(The)X
3133(encapsulation)X
3706(boundary)X
4112(is)X
720 5616(de\256ned)N
1044(as)X
1165(a)X
1249(line)X
1435(consisting)X
1866(entirely)X
2202(of)X
2324(two)X
2510(hyphen)X
2835(characters)X
3268(\("-",)X
3476(decimal)X
3824(code)X
4048(45\))X
720 5728(followed)N
1097(by)X
1228(the)X
1380(second)X
1681(parameter)X
2101(of)X
2215(the)X
2367(Content-type)X
2904(header)X
3195(\256eld)X
3400(with)X
3605(any)X
3778(leading)X
4096(or)X
720 5840(trailing)N
1040(white)X
1295(space)X
1550(removed.)X
1977(\(DISCUSSION:)X
2665(The)X
2857(speci\256cation)X
3386(that)X
3573(white)X
3829(space)X
4085(be)X

22 p
%%Page: 22 22
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(22)X
2520(-)X
720 688(removed)N
1094(is)X
1195(intended)X
1564(to)X
1676(eliminate)X
2073(the)X
2227(possible)X
2578(introduction)X
3085(of)X
3201(ambiguity)X
3628(caused)X
3926(by)X
4058(the)X
720 800(addition)N
1069(or)X
1182(deletion)X
1526(of)X
1639(white)X
1886(space)X
2133(by)X
2262(message)X
2622(transport)X
2998(agents.)X
3326(They)X
3558(hyphens)X
3912(are)X
4064(for)X
720 912(rough)N
974(compatibility)X
1519(with)X
1720(the)X
1868(earlier)X
2145(RFC)X
2356(934)X
2530(method)X
2849(of)X
2958(message)X
3313(encapsulation,)X
3896(and)X
4064(for)X
720 1024(ease)N
922(of)X
1039(searching)X
1445(for)X
1594(the)X
1749(boundaries)X
2208(in)X
2320(some)X
2560(implementations.)X
3288(However,)X
3701(it)X
3792(should)X
4085(be)X
720 1136(noted)N
1006(that)X
1222(multipart)X
1647(messages)X
2081(are)X
2270(NOT)X
2538(completely)X
3038(compatible)X
3538(with)X
3780(RFC)X
4032(934)X
720 1248(encapsulations;)N
1370(in)X
1501(particular,)X
1952(they)X
2175(do)X
2328(not)X
2508(obey)X
2752(RFC)X
2990(934)X
3191(quoting)X
3542(conventions)X
4064(for)X
720 1360(embedded)N
1140(lines)X
1346(that)X
1515(begin)X
1753(with)X
1948(hyphens.\))X
720 1584(Thus,)N
960(a)X
1027(typical)X
1314(multipart)X
1692(content-type)X
2198(header)X
2479(\256eld)X
2674(might)X
2923(look)X
3118(like)X
3287(this:)X
7 f
720 1808 0.4062(Content-type:)AN
1532 0.4167(multipart;)AX
2170(1-S;)X
2460 0.3929(gc0p4Jq0M2Yt08jU534c0p)AX
1 f
720 2032(This)N
918(indicates)X
1288(that)X
1460(the)X
1605(message)X
1958(consists)X
2289(of)X
2396(several)X
2696(parts,)X
2934(each)X
3138(itself)X
3358(structured)X
3770(as)X
3877(an)X
3995(RFC)X
720 2144(822)N
909(message,)X
1304(which)X
1584(are)X
1747(intended)X
2124(to)X
2244(be)X
2380(viewed)X
2703(one-at-a-time,)X
3292(and)X
3476(that)X
3665(the)X
3827(parts)X
4058(are)X
720 2256(separated)N
1108(by)X
1228(the)X
1370(line)X
720 2480(--gc0p4Jq0M2Yt08jU534c0p)N
720 2704(The)N
901(encapsulation)X
1462(boundaries)X
1915(must)X
2133(not)X
2287(appear)X
2575(within)X
2853(the)X
3003(encapsulations,)X
3626(and)X
3797(should)X
4085(be)X
720 2816(no)N
840(longer)X
1110(than)X
1300(70)X
1420(characters,)X
1859(not)X
2006(counting)X
2367(the)X
2509(two)X
2677(leading)X
2985(hyphens.)X
720 3040(The)N
921(encapsulation)X
1502(boundary)X
1916(following)X
2341(the)X
2510(last)X
2695(body-part)X
3120(should)X
3427(be)X
3569(a)X
3663(distinguished)X
720 3152(delimiter)N
1120(that)X
1316(indicates)X
1710(that)X
1906(no)X
2053(further)X
2366(body-parts)X
2828(will)X
3029(follow.)X
3378(Such)X
3620(a)X
3713(delimiter)X
4112(is)X
720 3264(identical)N
1082(to)X
1186(the)X
1333(previous)X
1693(delimiters,)X
2132(with)X
2332(the)X
2479(addition)X
2824(of)X
2933(two)X
3106(more)X
3333(hyphens)X
3682(at)X
3781(the)X
3928(end)X
4096(of)X
720 3376(the)N
862(line:)X
720 3600(--gc0p4Jq0M2Yt08jU534c0p--)N
720 3824(It)N
812(should)X
1101(be)X
1225(noted)X
1472(that)X
1650(there)X
1876(appears)X
2203(to)X
2311(be)X
2436(room)X
2673(for)X
2819(additional)X
3239(information)X
3728(prior)X
3949(to)X
4058(the)X
720 3936(\256rst)N
897(encapsulation)X
1455(boundary)X
1846(and)X
2013(following)X
2415(the)X
2561(\256nal)X
2760(such)X
2964(boundary.)X
3403(For)X
3564(several)X
3864(reasons,)X
720 4048(however,)N
1110(it)X
1199(is)X
1298(speci\256ed)X
1675(that)X
1855(these)X
2088(areas)X
2321(should)X
2612(be)X
2738(left)X
2903(blank,)X
3177(and)X
3352(that)X
3533(implementations)X
720 4160(should)N
1000(ignore)X
1270(anything)X
1631(that)X
1800(appears)X
2118(before)X
2388(the)X
2530(\256rst)X
2703(boundary)X
3090(or)X
3194(after)X
3395(the)X
3537(last)X
3695(one.)X
720 4384(The)N
902(use)X
1062(of)X
1174("Content-Type:)X
1807(Multipart")X
2243(as)X
2356(a)X
2432(message)X
2791(part)X
2974(within)X
3253(another)X
3575("Content-Type:)X
720 4496(Multipart")N
1153(is)X
1247(explicitly)X
1642(allowed.)X
2049(In)X
2159(such)X
2365(cases,)X
2622(for)X
2764(obvious)X
3098(reasons,)X
3440(care)X
3631(must)X
3847(be)X
3967(taken)X
720 4608(to)N
827(ensure)X
1110(that)X
1287(each)X
1496(nested)X
1774(mulitpart)X
2160(message)X
2518(should)X
2806(use)X
2966(a)X
3042(different)X
3407(boundary)X
3803(delimiter.)X
720 4720(See)N
883(Appendix)X
1286(II)X
1374(for)X
1510(an)X
1625(example)X
1976(of)X
2080(nested)X
2350(multipart)X
2728(messages.)X
720 4944(The)N
906(use)X
1070(of)X
1186(content-type)X
1704("Multipart")X
2182(with)X
2389(only)X
2596(a)X
2675(single)X
2942(included)X
3311(part)X
3498(may)X
3701(be)X
3829(useful)X
4101(in)X
720 5056(certain)N
1007(contexts,)X
1376(and)X
1539(is)X
1627(explicitly)X
2016(permitted.)X
720 5280(Overall,)N
1057(the)X
1199(body)X
1415(of)X
1519(a)X
1586(multipart)X
1964(message)X
2314(may)X
2504(be)X
2619(speci\256ed)X
2985(as)X
3089(follows:)X
7 f
10 s
720 5488(body)N
960(:=)X
1104(prefix)X
1440(1*encapsulation)X
2208(close-delimiter)X
2976(postfix)X

23 p
%%Page: 23 23
10 s 0 xH 0 xS 7 f
1 f
12 s
2344 384(-)N
2400(23)X
2520(-)X
7 f
10 s
720 672(encapsulation)N
1392(:=)X
1536(delimiter)X
2016(CRLF)X
2256(message)X
720 864(delimiter)N
1200(:=)X
1344("--")X
1584(<delimiter)X
2112(from)X
2352(Content-type)X
2976(resource>)X
720 1056(close-delimiter)N
1488(:=)X
1632(delimiter)X
2112("--")X
720 1248(prefix)N
1056(:=)X
1200(*text)X
720 1440(postfix)N
1104(:=)X
1248(*text)X
720 1632(message)N
1104(=)X
1200(<as)X
1392(defined)X
1776(in)X
1920(RFC)X
2112(822,)X
2352(with)X
2592(all)X
2784(header)X
3120(fields)X
1200 1728(optional,)N
1680(containing)X
2208(no)X
2352(lines)X
2640(matching)X
3072("delimiter">)X
1 f
12 s
720 1936(The)N
900(above)X
1161(description)X
1620(de\256nes)X
1923(the)X
2072(default)X
2371(subtype)X
2701(of)X
2812(the)X
2961(multipart)X
3346(type,)X
3567("mixed",)X
3941(which)X
720 2048(may)N
911(be)X
1027(explicitly)X
1417(speci\256ed)X
1784(with)X
1980(a)X
2048(content-type)X
2555(of)X
2659("multipart/mixed".)X
3455(Other)X
3698(subtypes)X
4058(are)X
720 2160(possible,)N
1088(but)X
1240(should)X
1525(be)X
1645(de\256ned)X
1957(to)X
2061(be)X
2181(syntactically)X
2698(compatible)X
3156(with)X
3356(the)X
3504("mixed")X
3853(subtype.)X
720 2272(Unrecognized)N
1294(subtypes)X
1664(should)X
1953(be)X
2077(treated)X
2373(as)X
2486(being)X
2733(of)X
2846(subtype)X
3178("mixed.")X
3554(\(DISCUSSION:)X
720 2384(Conspicuously)N
1330(missing)X
1668(from)X
1894(the)X
2051(multipart)X
2444(type)X
2650(is)X
2754(a)X
2837(notion)X
3123(of)X
2 f
3243(structure)X
1 f
3590(.)X
3654(In)X
3774(general,)X
4122(it)X
720 2496(seems)N
1007(premature)X
1450(to)X
1576(try)X
1734(to)X
1860(standardize)X
2350(structure)X
2738(yet.)X
2955(It)X
3065(is)X
3180(recommended)X
3777(that)X
3973(those)X
720 2608(wishing)N
1060(to)X
1171(provide)X
1501(a)X
1580(more)X
1814(structured)X
2235(or)X
2352(integrated)X
2775(multipart)X
3166(messaging)X
3609(facility)X
3920(should)X
720 2720(de\256ne)N
990(a)X
1068(subtype)X
1402(of)X
1517(multipart)X
1906(that)X
2086(is)X
2185(syntactically)X
2707(identical,)X
3098(but)X
3255(that)X
3434(always)X
3735(expects)X
4058(the)X
720 2832(inclusion)N
1134(of)X
1275(a)X
1379(distinguished)X
1953(part)X
2164(\(e.g.)X
2396(with)X
2629(a)X
2734(content-type)X
3278(of)X
3420("Application/x-my-)X
720 2944(structure-subtype"\))N
1491(that)X
1668(can)X
1834(be)X
1957(used)X
2165(to)X
2272(specify)X
2582(the)X
2731(structure)X
3099(and)X
3269(integration)X
3718(of)X
3829(the)X
3978(other)X
720 3056(parts,)N
956(probably)X
1323(referring)X
1685(to)X
1785(them)X
2003(by)X
2124(their)X
2326(Content-ID)X
2789(\256eld.)X
3033(If)X
3122(this)X
3286(approach)X
3664(is)X
3753(used,)X
3978(other)X
720 3168(implementations)N
1399(will)X
1585(not)X
1744(recognize)X
2155(the)X
2309(subtype,)X
2667(but)X
2825(will)X
3010(treat)X
3217(it)X
3306(as)X
3421(the)X
3574(default)X
3877(subtype)X
720 3280 0.2148(\(multipart/mixed\))AN
1430(and)X
1593(will)X
1767(thus)X
1951(be)X
2066(able)X
2251(to)X
2350(show)X
2576(the)X
2718(user)X
2902(the)X
3044(parts)X
3255(that)X
3424(are)X
3566(recognized.\))X
720 3504(This)N
916(memo)X
1182(de\256nes)X
1479(one)X
1643(particular)X
2038(subtype)X
2362(of)X
2468(multipart,)X
2872(the)X
3016("digest")X
3350(subtype.)X
3723(This)X
3920(type)X
4112(is)X
720 3616(syntactically)N
1248(identical)X
1621(to)X
1736(multipart,)X
2153(but)X
2315(the)X
2472(semantics)X
2891(are)X
3048(different.)X
3467(In)X
3586(particular,)X
4019(in)X
4133(a)X
720 3728(digest,)N
1020(all)X
1163(of)X
1289(the)X
1453(parts)X
1686(are)X
1850(assumed)X
2227(to)X
2348(be)X
2485(of)X
2611(type)X
2823("Message".)X
3332(That)X
3556(is,)X
3691(each)X
3915(part)X
4112(is)X
720 3840(implicitly)N
1125(pre\256xed)X
1469(by)X
1594(a)X
1666(line)X
1840(that)X
2014(says)X
2208("Content-type:)X
2806(message")X
3200(followed)X
3570(by)X
3694(a)X
3765(blank)X
4007(line.)X
720 3952(This)N
946(is)X
1065(provided)X
1462(in)X
1592(order)X
1851(to)X
1982(allow)X
2252(a)X
2351(more)X
2605(readable)X
2988(digest)X
3274(format)X
3587(that)X
3788(is)X
3908(largely)X
720 4064(compatible)N
1173(\(except)X
1481(for)X
1617(the)X
1759(quoting)X
2077(convention\))X
2561(with)X
2756(RFC)X
2961(934.)X

24 p
%%Page: 24 24
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(24)X
2520(-)X
3 f
720 688(5.3)N
1104(The)X
1288("Text-Plus")X
1813(Content-Type)X
2407(and)X
2585("RichMail")X
3100(subtype)X
1 f
720 912(There)N
973(are)X
1119(many)X
1361(formats)X
1683(for)X
1823(representing)X
2327(what)X
2542(might)X
2795(be)X
2914(known)X
3203(as)X
3311("extended)X
3726(text")X
3938(--)X
4031(text)X
720 1024(with)N
919(embedded)X
1343(formatting)X
1778(and)X
1945(presentation)X
2444(information.)X
2975(An)X
3120(interesting)X
3554 0.2500(characteristic)AX
4096(of)X
720 1136(most)N
951(such)X
1171(representations)X
1798(is)X
1907(that)X
2097(they)X
2308(are)X
2471(to)X
2591(some)X
2839(extent)X
3120(readable)X
3492(even)X
3719(without)X
4058(the)X
720 1248(software)N
1081(that)X
1256(interprets)X
1650(them.)X
1921(It)X
2010(is)X
2103(useful,)X
2391(then,)X
2610(to)X
2714(distinguish)X
3165(them,)X
3411(at)X
3510(the)X
3657(highest)X
3964(level,)X
720 1360(from)N
933(such)X
1135(non-readable)X
1665(data)X
1853(as)X
1960(images)X
2260(or)X
2367(audio)X
2608(messages.)X
3046(In)X
3153(the)X
3298(absence)X
3630(of)X
3737(appropriate)X
720 1472(interpreting)N
1205(software,)X
1595(it)X
1684(is)X
1783(reasonable)X
2230(to)X
2340(show)X
2577(extended)X
2960(text)X
3140(to)X
3249(the)X
3401(user,)X
3619(while)X
3867(it)X
3955(is)X
4053(not)X
720 1584(reasonable)N
1156(to)X
1255(do)X
1375(so)X
1484(with)X
1679(binary)X
1949(data.)X
720 1808(To)N
854(represent)X
1234(such)X
1438(data,)X
1651(this)X
1818(memo)X
2087(de\256nes)X
2387(a)X
2458("text-plus")X
2901(content-type.)X
3459(Plausible)X
3840(subtypes)X
720 1920(of)N
835(text-plus)X
1207(are)X
1360(typically)X
1732(given)X
1980(by)X
2110(the)X
2262(common)X
2633(name)X
2876(of)X
2990(the)X
3142(representation)X
3722(format,)X
4037(e.g.)X
720 2032("text-plus/Troff")N
1410(or)X
1535("text-plus/TeX".)X
2241(Character)X
2661(sets)X
2850(are)X
3013(not)X
3181(speci\256ed)X
3568(as)X
3693(subtypes;)X
4101(in)X
720 2144(general)N
1064(it)X
1178(is)X
1302(assume)X
1645(that)X
1850(rich)X
2060(text)X
2265(formats)X
2619(will)X
2828(have)X
3069(their)X
3305(own)X
3529(mechanisms)X
4064(for)X
720 2256(representing)N
1247(alternate)X
1631(or)X
1762(multiple)X
2135(character)X
2540(sets.)X
2783(Initial)X
3065(subtypes)X
3452(include)X
3787(troff,)X
4034(tex,)X
720 2368(PostScript,)N
1163(DVI,)X
1381(and)X
1544(ODA.)X
720 2592(****)N
936(Should)X
1232(the)X
1374(latter)X
1597(three)X
1814(really)X
2058(be)X
2173(binary????)X
720 2816(In)N
824(order)X
1051(to)X
1150(promote)X
1495(the)X
1637(wider)X
1880 0.2083(interoperability)AX
2499(of)X
2603(simple)X
2884(formatted)X
3283(text,)X
3476(this)X
3639(memo)X
3904(de\256nes)X
720 2928(a)N
796(default)X
1097(subtype)X
1429(for)X
1574("text-plus",)X
2046(the)X
2197("richmail")X
2630(subtype.)X
3010(This)X
3214(subtype)X
3546(was)X
3727(designed)X
4101(to)X
720 3040(meet)N
932(the)X
1074(following)X
1472(criteria:)X
1008 3264(1.)N
1129(All)X
1277(special)X
1570(formatting)X
2002(characters)X
2419(are)X
2563(extremely)X
2975(portable)X
3317(\(only)X
3546("%",)X
3754("\(",)X
1008 3376(and)N
1171("\)")X
1305(are)X
1447(used\).)X
1008 3600(2.)N
1132(The)X
1310(syntax)X
1589(is)X
1681(extremely)X
2095(simple)X
2380(to)X
2483(parse,)X
2738(so)X
2851(that)X
3024(even)X
3234 0.2227(teletype-oriented)AX
1008 3712(mail)N
1215(systems)X
1554(can)X
1723(easily)X
1983(strip)X
2189(away)X
2427(the)X
2580(formatting)X
3022(information)X
3511(and)X
3684(leave)X
1008 3824(only)N
1203(the)X
1345(readable)X
1696(text.)X
1008 4048(3.)N
1136(The)X
1318(syntax)X
1602(is)X
1699(easily)X
1957(extended)X
2338(to)X
2446(allow)X
2693(for)X
2838(new)X
3031(formatting)X
3471(commands)X
1008 4160(that)N
1177(are)X
1319(deemed)X
1643(essential.)X
1008 4384(4.)N
1138(The)X
1322(capabilities)X
1796(are)X
1948(extremely)X
2368(limited,)X
2701(to)X
2811(ensure)X
3097(that)X
3277(it)X
3366(can)X
3535(represent)X
1008 4496(no)N
1147(more)X
1388(than)X
1597(is)X
1704(likely)X
1967(to)X
2085(be)X
2219(representable)X
2775(by)X
2913(the)X
3073(user's)X
3344(primary)X
3691(word)X
1008 4608(processor.)N
1456(While)X
1725(this)X
1897(limits)X
2150(what)X
2370(can)X
2537(be)X
2661(sent,)X
2873(it)X
2960(increases)X
3346(the)X
3497(likelihood)X
1008 4720(that)N
1177(it)X
1255(can)X
1413(be)X
1528(properly)X
1878(displayed.)X
1008 4944(5.)N
1131(The)X
1309(syntax)X
1588(does)X
1792(not)X
1943(correspond)X
2398(exactly)X
2705(to)X
2808(any)X
2975(known)X
3264(existing)X
3597(system,)X
1008 5056(thus)N
1192(giving)X
1462(no)X
1582(special)X
1874(preference)X
2305(to)X
2404(anyone's)X
2775(current)X
3072(syntax.)X
720 5280(The)N
898(syntax)X
1177(of)X
1285("richmail")X
1713(is)X
1806(very)X
2006(simple.)X
2340(It)X
2428(is)X
2521(assumed,)X
2905(at)X
3004(the)X
3151(top-level,)X
3547(to)X
3651(be)X
3771(in)X
3875(the)X
4022(US-)X
720 5392(ASCII)N
994(character)X
1372(set.)X
1551(All)X
1698(characters)X
2113(represent)X
2490(themselves,)X
2966(with)X
3161(the)X
3303(following)X
3701(exceptions:)X
1008 5616(1.)N
1134(The)X
1314("%")X
1502(character)X
1886(may)X
2082(be)X
2203(used)X
2409(to)X
2514(quote)X
2759(characters)X
3181(that)X
3357(need)X
3570(quoting,)X
1008 5728(particularly)N
1477(itself)X
1694(and)X
1857(the)X
1999(left)X
2152(and)X
2315(right)X
2521(parenthesis)X
2978(characters.)X

25 p
%%Page: 25 25
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(25)X
2520(-)X
1008 688(2.)N
1143(The)X
1332("%")X
1529(character)X
1922(is)X
2025(used)X
2240(to)X
2354(begin)X
2607(a)X
2689(formatting)X
3135(token,)X
3413(which)X
3688(is)X
3792(no)X
1008 800(more)N
1290(than)X
1540(28)X
1720(characters)X
2195(long,)X
2474(consists)X
2861(only)X
3115(of)X
3278(case-insensitive)X
1008 912(alphanumeric)N
1565(characters)X
1988(or)X
2100(the)X
2250(hyphen)X
2565(character)X
2951("-",)X
3117(and)X
3289(ends)X
3498(with)X
3702(a)X
3778("\(")X
1008 1024(character.)N
1008 1248(3.)N
1131(After)X
1361(a)X
1431(formatting)X
1865(token,)X
2130(subsequent)X
2584(text)X
2756(is)X
2847(affected)X
3185(by)X
3308(that)X
3481(formatting)X
1008 1360(command)N
1412(until)X
1613(the)X
1755(next)X
1945(unquoted)X
2327("\)")X
2461(character.)X
720 1584(Thus,)N
960(for)X
1096(example,)X
1471(the)X
1613(following)X
2011("text-plus/richmail")X
2823(body)X
3039(fragment:)X
720 1808(%bold\(Now\))N
1251(is)X
1345(the)X
1493(time)X
1695(for)X
1837 0.2898(%italic\(all\))AX
2302(good)X
2524(men)X
2720(@%smaller\(\(and)X
3405(women%\)\))X
3862(to)X
3967(come)X
720 1920(to)N
819(the)X
961(aid)X
1103(of)X
1207(their)X
1408(country.)X
720 2144(represents)N
1145(the)X
1298(following)X
1707(formatted)X
2118(text)X
2299(\(which)X
2602(will,)X
2812(no)X
2944(doubt,)X
3223(look)X
3430(cryptic)X
3734(in)X
3845(the)X
3999(text-)X
720 2256(only)N
915(version)X
1222(of)X
1326(this)X
1489(memo\):)X
3 f
720 2480(Now)N
1 f
930(is)X
1018(the)X
1160(time)X
1356(for)X
2 f
1492(all)X
1 f
1618(good)X
1834(men)X
10 s
2024(\(and)X
2187(women\))X
12 s
2474(to)X
2573(come)X
2806(to)X
2905(the)X
3047(aid)X
3189(of)X
3293(their)X
3494(country.)X
720 2704(Initially)N
1050(de\256ned)X
1357(formatting)X
1788(tokens)X
2063(are:)X
3 f
1008 2928(Bold)N
1 f
1224(--)X
1312(causes)X
1587(the)X
1729(enclosed)X
2090(text)X
2259(to)X
2358(be)X
2473(in)X
2572(a)X
2639(bold)X
2834(font,)X
3037(if)X
3120(possible.)X
3 f
1008 3040(Italic)N
1 f
1246(--)X
1334(causes)X
1609(the)X
1751(enclosed)X
2112(text)X
2281(to)X
2380(be)X
2495(in)X
2594(an)X
2709(italic)X
2927(font,)X
3130(if)X
3213(possible.)X
3 f
1008 3152(Fixed)N
1 f
1262(--)X
1350(causes)X
1625(the)X
1767(enclosed)X
2128(text)X
2297(to)X
2396(be)X
2511(in)X
2610(a)X
2677(\256xed)X
2893(width)X
3136(font,)X
3339(if)X
3422(possible.)X
3 f
1008 3264(Smaller)N
1 f
1353(--)X
1441(causes)X
1716(the)X
1858(enclosed)X
2219(text)X
2388(to)X
2487(be)X
2602(in)X
2701(a)X
2768(smaller)X
3076(font,)X
3279(if)X
3362(possible.)X
3 f
1008 3376(Bigger)N
1 f
1305(--)X
1393(causes)X
1668(the)X
1810(enclosed)X
2171(text)X
2340(to)X
2439(be)X
2554(in)X
2653(a)X
2720(bigger)X
2990(font,)X
3193(if)X
3276(possible.)X
3 f
1008 3488(Underline)N
1 f
1443(--)X
1531(causes)X
1806(the)X
1948(enclosed)X
2309(text)X
2478(to)X
2577(be)X
2692(underlined,)X
3152(if)X
3235(possible.)X
3 f
1008 3600(Center)N
1 f
1315(--)X
1403(causes)X
1678(the)X
1820(enclosed)X
2181(text)X
2350(to)X
2449(be)X
2564(centered,)X
2939(if)X
3022(possible.)X
3 f
1008 3712(FlushLeft)N
1 f
1432(--)X
1520(causes)X
1795(the)X
1937(enclosed)X
2298(text)X
2467(to)X
2566(be)X
2681(left)X
2834(justi\256ed,)X
3192(if)X
3275(possible.)X
3 f
1008 3824(FlushRight)N
1 f
1490(--)X
1578(causes)X
1853(the)X
1995(enclosed)X
2356(text)X
2525(to)X
2624(be)X
2739(right)X
2945(justi\256ed,)X
3303(if)X
3386(possible.)X
3 f
1008 3936(Indent)N
1 f
1303(--)X
1391(causes)X
1666(the)X
1808(enclosed)X
2169(text)X
2338(to)X
2437(be)X
2552(indented)X
2908(at)X
3002(both)X
3197(margins,)X
3555(if)X
3638(possible.)X
3 f
1008 4048(ISO-10646)N
1 f
1474(--)X
1567(causes)X
1848(the)X
1996(enclosed)X
2363(text)X
2538(to)X
2643(be)X
2764(interpreted)X
3212(as)X
3322(text)X
3497(in)X
3602(the)X
3750(ISO-10646)X
1296 4160(character)N
1674(set,)X
1829(if)X
1912(possible.)X
3 f
1008 4272(ISO-8859-X)N
1 f
1562(\(for)X
1746(any)X
1925(registered)X
2345(value)X
2594(of)X
2714(X\))X
2855(--)X
2959(causes)X
3250(the)X
3408(enclosed)X
3785(text)X
3970(to)X
4085(be)X
1296 4384(interpreted)N
1738(as)X
1842(text)X
2011(in)X
2110(the)X
2252(appropriate)X
2715(character)X
3093(set,)X
3248(if)X
3331(possible.)X
3 f
1008 4496(ISO-2022)N
1 f
1434(--)X
1535(causes)X
1823(the)X
1978(enclosed)X
2352(text)X
2534(to)X
2646(be)X
2774(interpreted)X
3229(as)X
3346(text)X
3529(in)X
3642(the)X
3798(ISO-2022)X
1296 4608(multiple)N
1642(character)X
2020(set)X
2151(representation,)X
2745(if)X
2828(possible.)X
3 f
1008 4720(US-ASCII)N
1 f
1459(--)X
1556(causes)X
1840(the)X
1991(enclosed)X
2361(text)X
2539(to)X
2647(be)X
2771(interpreted)X
3222(as)X
3335(text)X
3513(in)X
3621(the)X
3772(US-ASCII)X
1296 4832(character)N
1694(set,)X
1869(if)X
1972(possible.)X
2379(Although)X
2786(this)X
2969(is)X
3077(the)X
3239(default)X
3551(character)X
3948(set,)X
4122(it)X
1296 4944(might)N
1545(be)X
1660(usefully)X
1994(nested)X
2264(inside)X
2518(another)X
2831(character)X
3209(set.)X
3 f
1008 5056(Invisible)N
1 f
1386(--)X
1476(causes)X
1753(the)X
1898(enclosed)X
2262(text)X
2434(to)X
2536(be)X
2654(regarded)X
3018(as)X
3125(invisible,)X
3508(and)X
3674(not)X
3824(shown)X
4101(to)X
1296 5168(the)N
1454(user.)X
1701(This)X
1911(can)X
2084(be)X
2214(used)X
2429(by)X
2564(systems)X
2907(that)X
3091(wish)X
3311(to)X
3425(translate)X
3791(a)X
3873("richer")X
1296 5280(format)N
1578(into)X
1753("richmail")X
2178(for)X
2315(mail)X
2512(transport,)X
2903(but)X
3051(want)X
3264(to)X
3365(be)X
3482(able)X
3669(to)X
3770(restore)X
4058(the)X
1296 5392(formatting)N
1727(more)X
1949(fully)X
2155(if)X
2238(it)X
2316(is)X
2404(read)X
2594(with)X
2789(a)X
2856(completely)X
3309(compatible)X
3762(system.)X
3 f
1008 5504(No-op)N
1 f
1282(--)X
1370(has)X
1522(no)X
1642(effect)X
1886(on)X
2006(the)X
2148(enclosed)X
2509(text.)X

26 p
%%Page: 26 26
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(26)X
2520(-)X
720 688(Implementations)N
1396(should)X
1680(regard)X
1954(any)X
2121(unrecognized)X
2668(formatting)X
3103(token)X
3345(as)X
3453(equivalent)X
3884(to)X
3988("No-)X
720 800(op",)N
903(thus)X
1087 0.2784(facilitating)AX
1530(future)X
1784(extensions)X
2214(to)X
2313("richmail".)X
720 1024(Richmail)N
1104(also)X
1289(differentiates)X
1829(betweeen)X
2224("hard")X
2504(and)X
2674("soft")X
2927(line)X
3103(breaks.)X
3433(A)X
3533("soft")X
3786(line)X
3962(break)X
720 1136(is)N
816(represented)X
1292(by)X
1420(a)X
1495(single)X
1756(CRLF)X
2027(\(end-of-line)X
2518(marker\),)X
2878(and)X
3048(may)X
3245(be)X
3367(ignored)X
3692(for)X
3835(purposes)X
720 1248(of)N
827(presentation.)X
1397(A)X
1493(sequence)X
1873(of)X
1980(one)X
2146(or)X
2253(more)X
2478(hard)X
2676(line)X
2849(breaks)X
3128(may)X
3322(be)X
3441(represented)X
3913(by)X
4037(one)X
720 1360(plus)N
927(that)X
1119(number)X
1460(of)X
1587(CRLF)X
1874(markers.)X
2279(Thus,)X
2542(a)X
2632(sequence)X
3032(of)X
3159(three)X
3398(consecutive)X
3899(CRLFs)X
720 1472(represents)N
1166(two)X
1366(hard)X
1593(line)X
1794(breaks.)X
2149(This)X
2376(allows)X
2683(portable)X
3056(wrapped)X
3444(and)X
3640(justi\256ed)X
4007(text,)X
720 1584(independent)N
1215(of)X
1319(window-size)X
1834(or)X
1938(line-length)X
2380(restrictions.)X
720 1808(A)N
820(minimal)X
1173(richmail)X
1526 0.2548(implementation)AX
2163(is)X
2258(one)X
2428(that)X
2604(implements)X
3085(the)X
3235("Invisible")X
3682(and)X
3853("No-op")X
720 1920(formatting)N
1176(tokens,)X
1500(regards)X
1832(all)X
1978(others)X
2262(as)X
2391(synonyms)X
2829(for)X
2990("no-op",)X
3364(and)X
3551(understands)X
4058(the)X
720 2032(richmail)N
1066(newline)X
1395(conventions.)X

27 p
%%Page: 27 27
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(27)X
2520(-)X
3 f
720 688(5.4)N
1104(The)X
1288(Message)X
1659(Content-Type)X
1 f
720 912(It)N
808(is)X
901(frequently)X
1326(desirable,)X
1728(in)X
1833(sending)X
2162(mail,)X
2388(to)X
2493(encapsulate)X
2973(another)X
3292(mail)X
3494(message.)X
3874(For)X
4037(this)X
720 1024(common)N
1081(operation,)X
1493(a)X
1560(special)X
1852(content-type,)X
2382("message",)X
2834(is)X
2922(hereby)X
3208(de\256ned.)X
720 1248(A)N
816(content-type)X
1325(of)X
1432("message")X
1863(with)X
2061(the)X
2206(default)X
2501(subtype)X
2828(of)X
2936("822")X
3186(indicates)X
3557(that)X
3730(the)X
3876(body)X
4096(or)X
720 1360(body)N
949(part)X
1136(is)X
1236(an)X
1363(encapsulated)X
1897(message,)X
2283(with)X
2490(the)X
2644(syntax)X
2931(of)X
3047(an)X
3174(RFC)X
3391(822)X
3571(message.)X
4005(This)X
720 1472(default)N
1012(subtype)X
1335(may)X
1525(be)X
1640(explicitly)X
2029(speci\256ed)X
2395(as)X
2499("Content-type:)X
3092(message/822")X
720 1696(The)N
913(special)X
1224(subtype)X
1566("pem")X
1853(may)X
2062(be)X
2196(used)X
2415(to)X
2534(indicate)X
2884(that)X
3073(the)X
3235(body)X
3471(or)X
3595(body)X
3831(part)X
4025(is)X
4133(a)X
720 1808(message)N
1070(conforming)X
1543(to)X
1642(the)X
1784(Privacy)X
2102(Enhanced)X
2506(Mail)X
2712(protocol)X
3081([RFC-1113].)X
720 2032(The)N
908(special)X
1214(subtype)X
1551("partial")X
1914(may)X
2118(be)X
2247(used)X
2461(to)X
2574(indicate)X
2919(that)X
3103(the)X
3260(body)X
3491(or)X
3610(body)X
3841(part)X
4030(is)X
4133(a)X
720 2144(fragment)N
1094(of)X
1200(a)X
1268(larger)X
1518(message.)X
1917(Three)X
2167(sub\256elds)X
2533(must)X
2745(be)X
2861(speci\256ed)X
3228(in)X
3328(the)X
3471(content-type)X
3978(\256eld:)X
720 2256(The)N
906(\256rst)X
1091(is)X
1191(a)X
1270(unique)X
1568(identi\256er,)X
1976(to)X
2088(be)X
2216(used)X
2429(to)X
2541(match)X
2814(the)X
2969(parts)X
3193(together.)X
3570(The)X
3757(second,)X
4085(an)X
720 2368(integer,)N
1037(is)X
1126(the)X
1269(part)X
1444(number.)X
1811(The)X
1986(third,)X
2217(another)X
2531(integer,)X
2848(is)X
2937(the)X
3080(total)X
3277(number)X
3596(of)X
3701(parts.)X
3960(Thus,)X
720 2480(part)N
894(2)X
966(of)X
1070(a)X
1137(3-part)X
1391(message)X
1741(might)X
1990(have)X
2196(the)X
2338(following)X
2736(header)X
3017(\256eld:)X
7 f
1008 2704 0.4062(Content-type:)AN
1820 0.4000(Message/Partial;)AX
2806 0.4018(oc=jpbe0M2Yt4s;)AX
3734(2;)X
3908(3)X
1 f
720 2928(When)N
984(the)X
1136(parts)X
1357(of)X
1471(a)X
1548(message)X
1908(broken)X
2209(up)X
2339(in)X
2448(this)X
2622(manner)X
2946(are)X
3099(put)X
3257(together,)X
3632(the)X
3785(result)X
4034(is)X
4133(a)X
720 3040(complete)N
1106(RFC-822)X
1495(format)X
1784(message,)X
2165(which)X
2431(may)X
2628(have)X
2841(its)X
2963(own)X
3159(Content-type)X
3693(header)X
3981(\256eld,)X
720 3152(and)N
907(thus)X
1115(may)X
1329(contain)X
1661(any)X
1849(other)X
2096(data)X
2306(type.)X
2569(\(EXPLANATION:)X
3377(The)X
3576(purpose)X
3929(of)X
4058(the)X
720 3264(MESSAGE/PARTIAL)N
1633(type)X
1833(is)X
1930(to)X
2038(allow)X
2285(large)X
2511(objects)X
2817(to)X
2925(be)X
3049(delivered)X
3441(as)X
3554(several)X
3860(separate)X
720 3376(pieces)N
992(of)X
1103(mail)X
1306(and)X
1476 0.2812(automatically)AX
2033(reassembled)X
2540(by)X
2667(the)X
2816(receiving)X
3206(user)X
3397(agent.)X
3685(This)X
3887(may)X
4085(be)X
720 3488(desirable)N
1092(when)X
1324 0.2841(intermediate)AX
1831(transport)X
2197(agents)X
2467(limit)X
2674(the)X
2816(size)X
2990(of)X
3094(messages)X
3481(that)X
3650(can)X
3808(be)X
3923(sent.\))X
720 3712(Additionally,)N
1260(all)X
1386(the)X
1533(character)X
1916(set)X
2052(subtypes)X
2417(of)X
2526(text)X
2701(are)X
2849(de\256ned)X
3162(as)X
3272(subtypes)X
3638(of)X
3748("message.")X
720 3824(If)N
810(a)X
879(character)X
1259(set)X
1392(subtype)X
1717(is)X
1807(given,)X
2071(it)X
2151(applies)X
2449(to)X
2549(the)X
2692(uninterpreted)X
3231(textual)X
3519(\256elds)X
3752(in)X
3852(the)X
3995(RFC)X
720 3936(822)N
921(message)X
1304(header)X
1618(area.)X
1884(Thus)X
2133(it)X
2244(can)X
2435(be)X
2583(used)X
2816(to)X
2949(represent)X
3360(address)X
3706(and)X
3903(subject)X
720 4048(information)N
1207(in)X
1314(non-ASCII)X
1772(character)X
2158(sets.)X
2382(The)X
2564(character)X
2950(set)X
3089(subtype)X
3420(does)X
3628(NOT)X
3856(apply)X
4101(to)X
720 4160(the)N
868(body)X
1090(of)X
1200(the)X
1349(encapsulated)X
1878(message.)X
2283(Thus,)X
2530(to)X
2636(encapsulate)X
3117(a)X
3191(message)X
3548(with)X
3750(non-ASCII)X
720 4272(characters)N
1142(in)X
1248(both)X
1450(the)X
1599(header)X
1887(\256elds)X
2126(and)X
2296(in)X
2402(the)X
2550(body,)X
2796(you)X
2970(would)X
3240(need)X
3452(something)X
3883(like)X
4058(the)X
720 4384(following:)N
7 f
10 s
1008 4592(From:)N
1296(<ASCII)X
1632(form>)X
1008 4688(Subject:)N
1488(<ASCII)X
1824(form>)X
1008 4784(Content-type:)N
1728(message/iso-10646)X
1008 4976(From:)N
1296(<iso-10646-form>)X
1008 5072(Subject)N
1392(<iso-10646-form>)X
1008 5168(Content-type:)N
1680(text/iso-10646)X
1008 5360(Message)N
1392(body)X
1632(in)X
1776(iso-10646)X
2256(character)X
2736(set.)X

28 p
%%Page: 28 28
10 s 0 xH 0 xS 7 f
12 s
1 f
2344 400(-)N
2400(28)X
2520(-)X
3 f
720 688(5.5)N
1104(The)X
1288(Binary)X
1595(Content-Type)X
1 f
720 912(A)N
819(content-type)X
1332(of)X
1443("binary")X
1798(may)X
1995(be)X
2117(used)X
2324(to)X
2430(Indicate)X
2772(that)X
2948(the)X
3097(body)X
3320(or)X
3431(body)X
3654(part)X
3835(is)X
3930(binary)X
720 1024(data.)N
964(A)X
1068(subtype)X
1402(may)X
1603(be)X
1728(speci\256ed,)X
2128(but)X
2285(none)X
2506(are)X
2658(de\256ned)X
2975(here.)X
3223(The)X
3407(parameters)X
3864(for)X
4010(type)X
720 1136(binary)N
994(are)X
1140(a)X
1211(set)X
1346(of)X
1454 0.2455(attribute/value)AX
2040(pairs,)X
2279(of)X
2387(the)X
2533(form)X
2748("NAME=VALUE",)X
3540(separated)X
3933(by)X
4058(the)X
720 1248(usual)N
951(semicolons.)X
1460(The)X
1638(set)X
1773(of)X
1881(possible)X
2223(attributes)X
2609(to)X
2711(be)X
2829(de\256ned)X
3139(includes,)X
3511(but)X
3661(is)X
3752(not)X
3902(limited)X
720 1360(to:)N
2 f
1008 1584(NAME)N
1 f
1294(--)X
1382(a)X
1449(suggested)X
1852(name)X
2085(for)X
2221(the)X
2363(binary)X
2633(data)X
2818(as)X
2922(a)X
2989(\256le.)X
2 f
1008 1808(TYPE)N
1 f
1256(--)X
1344(the)X
1486(type)X
1676(of)X
1780(binary)X
2050(data)X
2 f
1008 2032(CONVERSIONS)N
1 f
1674(--)X
1770(the)X
1920(set)X
2059(of)X
2171(operations)X
2604(that)X
2781(have)X
2995(been)X
3209(performed)X
3642(on)X
3770(the)X
1008 2144(data)N
1258(before)X
1593(putting)X
1955(it)X
2098(in)X
2262(the)X
2469(mail)X
2730(\(and)X
2990(before)X
3324(any)X
3551(Content-)X
1008 2256(TransferEncoding)N
1736(that)X
1914(might)X
2172(have)X
2387(been)X
2602(applied\).)X
2975(If)X
3073(multiple)X
3429(conversions)X
1008 2368(have)N
1229(occurred,)X
1629(they)X
1834(should)X
2129(be)X
2259(speci\256ed)X
2640(in)X
2754(the)X
2910(order)X
3151(they)X
3355(were)X
3580(applied,)X
1008 2480(and)N
1171(separated)X
1559(by)X
1679(commas.)X
720 2704(The)N
896(values)X
1168(for)X
1306(these)X
1530(attributes)X
1915(are)X
2059(left)X
2214(unde\256ned)X
2620(at)X
2717(present,)X
3046(but)X
3196(may)X
3389(require)X
3689(speci\256cation)X
720 2816(in)N
819(the)X
961(future.)X
1263(An)X
1404(example)X
1755(of)X
1859(a)X
1926(common)X
2287(\(though)X
2610(discouraged\))X
3131(usage)X
3374(might)X
3623(be:)X
7 f
1008 3040 0.4062(Content-type:)AN
1878(binary;)X
2342 0.4062(name=foo.tar;)AX
3154 0.4219(type=tar;)AX
1472 3152 0.3884(conversions=compress,uuencode)AN
1 f
720 3376(However,)N
1161(the)X
1344(use)X
1537(of)X
1682(such)X
1924(mechanisms)X
2466(as)X
2612(uuencode)X
3047(and)X
3252(compress)X
3681(is)X
3811(explicitly)X
720 3488(discouraged,)N
1248(in)X
1362(favor)X
1604(of)X
1723(the)X
1880(more)X
2117(standardized)X
2643(Content-TransferEncoding)X
3713(mechanism.)X
720 3600(In)N
836(particular,)X
1266(uuencode)X
1671(is)X
1771(not)X
1930(well-suited)X
2394(for)X
2543(mail)X
2752(transport)X
3131(because)X
3473(it)X
3564(is)X
3665(ill-de\256ned,)X
4122(it)X
720 3712(comes)N
992(in)X
1093(several)X
1392(incompatible)X
1922(versions,)X
2292(many)X
2532(of)X
2638(which)X
2899(do)X
3021(not)X
3170(work)X
3393(in)X
3494(a)X
3562(pipe,)X
3777(and)X
3941(which)X
720 3824(use)N
880(characters)X
1303(that)X
1480(do)X
1608(not)X
1763(translate)X
2122(well)X
2321(into)X
2504(certain)X
2800(representations)X
3416(\(e.g.)X
3620(EBCDIC\))X
4037(and)X
720 3936(are)N
863(not)X
1011(transmitted)X
1470(reliably)X
1789(over)X
1984(certain)X
2271(connections)X
2755(\(e.g.)X
2950(those)X
3177(that)X
3346(remove)X
3659(trailing)X
3962(white)X
720 4048(space)N
958(from)X
1169(a)X
1236(line\).)X
720 4272(The)N
930(recommended)X
1536(action)X
1832(for)X
2004(an)X
2155 0.2548(implementation)AX
2821(that)X
3027(receives)X
3404(binary)X
3711(mail)X
3944(of)X
4085(an)X
720 4384(unrecognized)N
1292(type)X
1511(is)X
1628(to)X
1756(simply)X
2071(offer)X
2311(to)X
2439(put)X
2615(the)X
2786(data)X
3000(in)X
3128(a)X
3224(\256le,)X
3424(with)X
3648(any)X
3839(Content-)X
720 4496(TransferEncoding)N
1463(undone,)X
1818(or)X
1946(perhaps)X
2293(to)X
2416(use)X
2592(it)X
2694(as)X
2822(input)X
3068(to)X
3191(a)X
3282(user-speci\256ed)X
3864(process.)X
720 4608(Implementations)N
1406(are)X
1562(warned)X
1883(NOT)X
2118(to)X
2230(implement)X
2680(a)X
2760(path-search)X
3241(mechanism)X
3717(whereby)X
4085(an)X
720 4720(arbitrary)N
1083(program)X
1440(named)X
1728(in)X
1834(the)X
1983(Content-type)X
2517(header)X
2805(\(e.g.)X
3008(the)X
3158("type=")X
3488(sub\256eld\))X
3856(is)X
3952(found)X
720 4832(and)N
894(executed)X
1272(using)X
1515(the)X
1668(binary)X
1949(data)X
2145(as)X
2260(input.)X
2541(Such)X
2768(an)X
2894 0.2548(implementation)AX
3534(could)X
3782(open)X
4003(up)X
4133(a)X
720 4944(signi\256cant)N
1145(security)X
1474(problem,)X
1843(the)X
1985(elucidation)X
2438(of)X
2542(which)X
2801(is)X
2889(left)X
3042(as)X
3146(an)X
3261(exercise)X
3601(for)X
3737(the)X
3879(reader.)X

29 p
%%Page: 29 29
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(29)X
2520(-)X
3 f
720 688(5.6)N
1104(The)X
1288(Application)X
1792(Content-Type)X
2386(Value)X
1 f
720 912(The)N
908("application")X
1453(content-type)X
1973(is)X
2075(to)X
2188(be)X
2317(usedor)X
2611(mail-based)X
3072(applications.)X
3624(The)X
3812(notion)X
4096(of)X
720 1024(mail-based)N
1179(application)X
1644(is)X
1744(an)X
1871(application)X
2335(that)X
2515(de\256nes)X
2822(a)X
2900(standard)X
3261(format)X
3553(for)X
3700(representing)X
720 1136 0.2841(intermediate)AN
1235(data)X
1429(that)X
1607(is)X
1704(to)X
1812(be)X
1936(manipulated)X
2446(by)X
2575(cooperating)X
3063(user)X
3256(agents.)X
3583(For)X
3749(example,)X
4133(a)X
720 1248(meeting)N
1058(scheduler)X
1454(might)X
1706(de\256ne)X
1968(a)X
2038(standard)X
2391(representation)X
2964(for)X
3103(information)X
3584(about)X
3824(proposed)X
720 1360(meeting)N
1061(dates.)X
1337(An)X
1484(intelligent)X
1906(user)X
2096(agent)X
2335(would)X
2605(use)X
2763(this)X
2933(information)X
3419(to)X
3525(conduct)X
3861(a)X
3935(dialog)X
720 1472(with)N
915(the)X
1057(user,)X
1265(and)X
1428(might)X
1677(then)X
1867(send)X
2067(further)X
2353(more)X
2575(based)X
2818(on)X
2938(that)X
3107(dialog.)X
720 1696(Such)N
938(applications)X
1430(may)X
1622(be)X
1739(de\256ned)X
2048(as)X
2154(subtypes)X
2517(of)X
2624(the)X
2769("application")X
3303(content-type.)X
3860(There)X
4112(is)X
720 1808(no)N
874(default)X
1200(subtype)X
1556(for)X
1725(application,)X
2235(and)X
2431(this)X
2627(memo)X
2925(de\256nes)X
3254(only)X
3482(one)X
3678(subtype,)X
4058(the)X
720 1920 0.1875("external-reference")AN
1524(subtype.)X
720 2144(The)N
917 0.2243(External-Reference)AX
1714(subtype)X
2060(indicates)X
2450(that)X
2642(the)X
2808(body)X
3048(or)X
3176(body)X
3416(part)X
3614(is)X
3726(primarily)X
4133(a)X
720 2256(placeholder)N
1199(for)X
1340(the)X
1487(data)X
1677(that)X
1851(are)X
1998(intended)X
2358(to)X
2461(be)X
2580(conveyed,)X
3001(presumably)X
3478(because)X
3811(too)X
3962(much)X
720 2368(data)N
916(is)X
1015(involved)X
1387(for)X
1534(the)X
1687(underlying)X
2139(mail)X
2346(transport)X
2723(mechanism)X
3197(to)X
3308(handle.)X
3649(The)X
3835(sub\256elds)X
720 2480(are,)N
900(as)X
1018(in)X
1131(the)X
1287(case)X
1490(of)X
1607(the)X
1762("binary")X
2123(content-type,)X
2666 0.2277(attribute-value)AX
3266(pairs.)X
3538(In)X
3655(this)X
3831(case,)X
4058(the)X
720 2592(sub\256elds)N
1109(describe)X
1478(a)X
1569(mechanism)X
2056(for)X
2216(accessing)X
2633(the)X
2800(binary)X
3095(data.)X
3377(The)X
3576(set)X
3732(of)X
3861(possible)X
720 2704(attributes)N
1103(includes,)X
1472(but)X
1619(is)X
1707(not)X
1854(limited)X
2152(to:)X
2 f
1008 2928(FILENAME)N
1 f
1497(--)X
1585(The)X
1759(name)X
1992(of)X
2096(a)X
2163(\256le)X
2310(that)X
2479(contains)X
2824(the)X
2966(external)X
3301(data.)X
2 f
1008 3152(SITE)N
1 f
1235(--)X
1334(one)X
1508(or)X
1623(more)X
1856(domain)X
2180(names,)X
2485(comma)X
2804(separated,)X
3227(of)X
3343(machines)X
3743(that)X
1008 3264(are)N
1150(known)X
1435(to)X
1534(have)X
1740(access)X
2010(to)X
2109(the)X
2251(data)X
2436(\256le.)X
1008 3488(REAL-TYPE)N
1555(--)X
1643(The)X
1817(real)X
1986(content-type)X
2492(of)X
2596(the)X
2738(data,)X
2947(once)X
3153(retrieved.)X
1008 3712(EXPIRATION)N
1614(--)X
1710(The)X
1892(date)X
2085(\(in)X
2224(the)X
2374(format)X
2663("month)X
2980(day,)X
3175(year"\))X
3444(after)X
3653(which)X
1008 3824(the)N
1150(existence)X
1533(of)X
1637(the)X
1779(external)X
2114(data)X
2299(is)X
2387(not)X
2534(guaranteed.)X
720 4048(With)N
950(the)X
1105(emerging)X
1506(possibility)X
1944(of)X
2062(very)X
2271(wide-area)X
2689(\256le)X
2850(systems,)X
3216(it)X
3308(becomes)X
3683(very)X
3892(hard)X
4101(to)X
720 4160(know)N
961(in)X
1064(advance)X
1408(the)X
1554(set)X
1689(of)X
1797(machines)X
2189(where)X
2452(a)X
2523(\256le)X
2674(will)X
2852(and)X
3018(will)X
3195(not)X
3345(be)X
3463(accessible)X
3881(directly)X
720 4272(from)N
940(the)X
1092(\256le)X
1249(system.)X
1598(Therefore)X
2012(it)X
2100(makes)X
2380(sense)X
2622(to)X
2731(provide)X
3059(both)X
3264(a)X
3341(\256le)X
3498(name,)X
3765(to)X
3874(be)X
3999(tried)X
720 4384(directly,)N
1065(and)X
1230(the)X
1374(name)X
1609(of)X
1715(one)X
1880(or)X
1986(more)X
2210(sites)X
2407(from)X
2619(which)X
2879(the)X
3022(\256le)X
3170(is)X
3259(known)X
3545(to)X
3645(be)X
3761(accessible.)X
720 4496(An)N
862 0.2548(implementation)AX
1493(can)X
1652(try)X
1784(to)X
1884(retrieve)X
2204(remote)X
2497(\256les)X
2682(using)X
2915(FTP)X
3105(or)X
3210(any)X
3374(other)X
3597(protocol,)X
3968(using)X
720 4608(anonymous)N
1203(\256le)X
1366(retrieval)X
1728(or)X
1847(prompting)X
2287(the)X
2444(user)X
2643(for)X
2794(the)X
2951(necessary)X
3364(name)X
3612(and)X
3790(password.)X
720 4720(However,)N
1122(the)X
1266 0.2316(external-reference)AX
1994(mechanism)X
2459(is)X
2549(not)X
2698(intended)X
3057(to)X
3159(be)X
3277(limited)X
3578(to)X
3680(\256le)X
3830(retrieval.)X
720 4832(One)N
940(can)X
1134(imagine,)X
1529(for)X
1700(example,)X
2110(using)X
2377(a)X
2479(LISTSERV)X
2986(mechanism,)X
3508(or)X
3647(using)X
3914(unique)X
720 4944(identi\256ers)N
1133(and)X
1300(a)X
1371(video)X
1613(server)X
1876(for)X
2016(external)X
2355(references)X
2780(to)X
2884(video)X
3127(clips.)X
3362(However,)X
3767(this)X
3935(memo)X
720 5056(explicitly)N
1113(de\256nes)X
1413(only)X
1611(the)X
1756(FILENAME)X
2268(and)X
2434(SITE)X
2664(attributes)X
3050(for)X
3189(retrieval)X
3538(purposes,)X
3930(as)X
4037(this)X
720 5168(is)N
816(the)X
966(only)X
1169(retrieval)X
1523(method)X
1844(that)X
2021(is)X
2117(currently)X
2497(widely)X
2791(applicable.)X
3244(Other)X
3495(attributes)X
3886(may)X
4085(be)X
720 5280(de\256ned)N
1027(as)X
1131(needed.)X
720 5504(The)N
901("REAL-TYPE")X
1533(attribute)X
1886(may)X
2083(be)X
2205(used)X
2412(to)X
2518(specify)X
2828(a)X
2903(new)X
3095(content-type)X
3609(header)X
3898(\256eld)X
4101(to)X
720 5616(be)N
845(applied)X
1163(to)X
1272(the)X
1424(data)X
1619(once)X
1835(retrieved,)X
2235(as)X
2348(the)X
2499(data)X
2693(are)X
2844(assumed)X
3208(to)X
3316(be)X
3440(only)X
3644(the)X
3795(body)X
4020(of)X
4133(a)X
720 5728(message,)N
1109(not)X
1271(including)X
1674(any)X
1852(header)X
2149(information.)X
2692(Note)X
2919(that)X
3104(semicolons)X
3577(may)X
3783(be)X
3914(quoted)X
720 5840(within)N
999(sub\256elds.)X
1421(Thus)X
1646(an)X
1769(external)X
2112(reference)X
2503(to)X
2610(an)X
2733(image)X
3001(in)X
3108(G3FAX)X
3448(format)X
3737(might)X
3994(have)X

30 p
%%Page: 30 30
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(30)X
2520(-)X
720 688(the)N
862(following)X
1260(content-type)X
1766(header)X
2047(\256eld:)X
7 f
1008 912 0.4062(Content-Type:)AN
1820 0.3875(application/external-reference;)AX
1296 1024 0.3864(name=/usr/local/images/contact.g3;)AN
1296 1136 0.3900(site=thumper.bellcore.com;)AN
1296 1248 0.3920(real-type="image/g3fax")AN
1296 1360 0.4167(expiration)AN
1934(=)X
2050 0.4167("September)AX
2688(23,)X
2920(1997")X
1 f
720 1584(If)N
815(a)X
889(message)X
1247(is)X
1343(of)X
1455(content-type)X
1969 0.1953("application/external-reference",)AX
3261(then)X
3459(the)X
3609(actual)X
3872(body)X
4096(of)X
720 1696(the)N
862(message)X
1212(is)X
1300(ignored.)X

31 p
%%Page: 31 31
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(31)X
2520(-)X
3 f
720 688(5.7)N
1104(The)X
1288(Audio,)X
1586(Image,)X
1890(and)X
2068(Video,)X
2356(and)X
2534(X-)X
2659(Content-Type)X
3253(Values)X
1 f
720 912(This)N
926(memo)X
1202(de\256nes)X
1509(several)X
1817(morecontent-type)X
2532(values)X
2813(that)X
2993(are)X
3146(de\256ned)X
3465(only)X
3672(incompletely)X
720 1024(here,)N
942(and)X
1113(await)X
1354(further)X
1648(practical)X
2013(experience)X
2463(before)X
2741(their)X
2950(values)X
3228(can)X
3394(be)X
3517(more)X
3747(completely)X
720 1136(speci\256ed.)N
3 f
720 1360(AUDIO)N
1 f
1085(--)X
1243(Indicates)X
1637(that)X
1828(the)X
1993(body)X
2232(or)X
2359(body)X
2598(part)X
2795(contains)X
3163(audio)X
3424(data.)X
3680(The)X
3877(subtype)X
720 1472(speci\256es)N
1081(the)X
1229(audio)X
1473(representation)X
2049(format;)X
2362(prede\256ned)X
2797(case-insensitive)X
3436(values)X
3711(are)X
3858("U-law")X
720 1584(and)N
911("A-law".)X
1330(\(U-law)X
1655(and)X
1847(A-law)X
2140(are)X
2311(the)X
2482(American)X
2915(and)X
3107(European)X
3529(audio)X
3796(telephony)X
720 1696(standards.\))N
1177(The)X
1365(parameters)X
1826(are)X
1982 0.2455(attribute/value)AX
2578(pairs,)X
2827(as)X
2944(in)X
3056(the)X
3211(binary)X
3494(content-type,)X
4037(and)X
720 1808(may)N
925(be)X
1055(used)X
1271(to)X
1386(name)X
1635(a)X
1718(header)X
2015(format)X
2312(\(e.g.)X
2523("header=Sun"\),)X
3157(to)X
3272(specify)X
3590(the)X
3748(size)X
3938(of)X
4058(the)X
720 1920(header)N
1009(that)X
1186(precedes)X
1555(the)X
1705(actual)X
1968(audio)X
2214(data)X
2406(\(e.g.)X
2608("headersize=234568)X
3427(bytes",)X
3724(or)X
3835(for)X
3978(other)X
720 2032(purposes.)N
3 f
720 2256(IMAGE)N
1089(--)X
1 f
1153(Indicates)X
1534(that)X
1713(the)X
1865(body)X
2091(or)X
2205(body)X
2431(part)X
2615(contains)X
2970(an)X
3095(image.)X
3413(The)X
3597(subtype)X
3930(names)X
720 2368(the)N
867(speci\256c)X
1190(image)X
1455(format;)X
1768(prede\256ned)X
2203(case)X
2398(insensitive)X
2838(values)X
3112(include)X
3424("G3Fax")X
3791(for)X
3931(Group)X
720 2480(Three)N
971(Fax)X
1141(and)X
1306("pbm",)X
1605("pgm",)X
1904(and)X
2069("ppm")X
2344(for)X
2482(the)X
2626("portable)X
3007(bitmap")X
3341(formats)X
3662(for)X
3801(black)X
4037(and)X
720 2592(white,)N
982(grey)X
1177(scale,)X
1418(or)X
1522(color)X
1744(images.)X
3 f
720 2816(VIDEO)N
1 f
1064(--)X
1158(Indicates)X
1536(that)X
1711(the)X
1859(body)X
2081(or)X
2191(body)X
2413(part)X
2593(contains)X
2945(a)X
3019(video)X
3264(sequence.)X
3696(The)X
3877(subtype)X
720 2928(and)N
883(possible)X
1222(parameter)X
1632(values)X
1902(are)X
2044(left)X
2197(unde\256ned)X
2600(by)X
2720(this)X
2883(memo.)X
3 f
720 3152("X-")N
965(anything)X
1 f
1365(--)X
1467(Any)X
1670(type)X
1874(value)X
2121(beginning)X
2544(with)X
2753(the)X
2909(characters)X
3338("X-")X
3555(and)X
3732(not)X
3893(de\256ned)X
720 3264(here)N
926(or)X
1046(in)X
1161(another)X
1490(RFC)X
1711(is)X
1815(a)X
1897(private)X
2204(value,)X
2476(to)X
2590(be)X
2720(used)X
2935(by)X
3070(consenting)X
3526(mail)X
3737(systems)X
4080(by)X
720 3376(mutual)N
1013(agreement.)X
1488(Any)X
1678(format)X
1960(without)X
2279(a)X
2347(rigorous)X
2693(and)X
2858(public)X
3125(de\256nition)X
3520(should)X
3802(be)X
3919(named)X
720 3488(with)N
925(an)X
1050("X-")X
1263(pre\256x.)X
1569(The)X
1753(widely-used)X
2257(Andrew)X
2600(system)X
2900(uses)X
3098(the)X
3249("X-BE2")X
3632(name,)X
3898(so)X
4016(new)X
720 3600(systems)N
1048(should)X
1328(probably)X
1694(choose)X
1985(a)X
2052(different)X
2408(name.)X

32 p
%%Page: 32 32
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(32)X
2520(-)X
3 f
14 s
720 704(6)N
1104(RFC-XXXX)X
1724(Compliance)X
1 f
12 s
720 944(The)N
906(mechanisms)X
1418(described)X
1823(in)X
1934(this)X
2109(memo)X
2386(are)X
2541(open-ended.)X
3075(It)X
3171(is)X
3272(de\256nitely)X
3673(not)X
3833(expected)X
720 1056(that)N
896(all)X
1024(implementations)X
1697(will)X
1877(implement)X
2320(all)X
2447(of)X
2557(the)X
2705(content-types)X
3254(described,)X
3677(nor)X
3835(that)X
4010(they)X
720 1168(will)N
905(all)X
1037(share)X
1275(the)X
1429(same)X
1663(extensions.)X
2153(In)X
2269(order)X
2508(to)X
2619(promote)X
2976 0.1953(interoperability,)AX
3631(however,)X
4022(it)X
4112(is)X
720 1280(useful)N
994(to)X
1108(de\256ne)X
1382(the)X
1539(concept)X
1878(of)X
1997("RFC-XXXX-Compliance")X
3101(to)X
3215(de\256ne)X
3488(a)X
3569(certain)X
3870(level)X
4096(of)X
720 1392 0.2548(implementation)AN
1354(that)X
1527(allows)X
1806(the)X
1952(useful)X
2215(interworking)X
2740(of)X
2848(messages)X
3239(with)X
3438(content)X
3751(that)X
3925(differs)X
720 1504(from)N
931(US)X
1077(ASCII)X
1351(text.)X
1568(In)X
1672(this)X
1835(section,)X
2156(we)X
2292(specify)X
2594(the)X
2736(requirements)X
3263(for)X
3399(such)X
3599(compliance.)X
720 1728(An)N
861(RFC-XXXX-Compliant)X
1813(mail)X
2009(user)X
2193(agent)X
2426(must:)X
1008 1952(1.)N
1129(Recognize)X
1561(the)X
1704(Content-TransferEncoding)X
2761(header)X
3043(\256eld,)X
3263(and)X
3428(decode)X
3727(data)X
1008 2064(encoded)N
1356(with)X
1554(either)X
1800(the)X
1944(quoted-printable)X
2607(or)X
2713(base64)X
3006(implementations.)X
3723(\(If)X
3845(a)X
1008 2176(compressed)N
1494(encoding)X
1880(is)X
1977(ever)X
2176(agreed)X
2466(to,)X
2598(it)X
2685(should)X
2974(also)X
3162(become)X
3495(part)X
3678(of)X
3791(all)X
1008 2288(compliant)N
1418(user)X
1602(agents.\))X
1008 2512(2.)N
1157(Recognize)X
1618(and)X
1811(interpret)X
2192(the)X
2364(Content-type)X
2921(header)X
3232(\256eld,)X
3481(and)X
3674(avoid)X
1008 2624(showing)N
1363(an)X
1484(unsuspecting)X
2016(user)X
2206(raw)X
2380(data)X
2571(that)X
2746(has)X
2904(a)X
2977(content-type)X
3489(\256eld)X
3690(other)X
1008 2736(than)N
1198(text.)X
1008 2960(3.)N
1138(Explicitly)X
1553(handle)X
1844(the)X
1996(following)X
2405(content-type)X
2922(values,)X
3227(as)X
3342(de\256ned)X
3660(in)X
3770(the)X
1008 3072(appendices:)N
1296 3296(--)N
1384(text,)X
1577(with)X
1772(at)X
1866(least)X
2067(the)X
2209(US-ASCII)X
2637(character)X
3015(set.)X
1296 3520(--)N
1386(text-plus,)X
1773(with)X
1970(the)X
2114(default)X
2408("richmail")X
2834(subtype,)X
3183(at)X
3279(least)X
3482(the)X
1296 3632(minimal)N
1642 0.2548(implementation)AX
2272(speci\256ed)X
2638(above.)X
1296 3856(--)N
1384(message,)X
1758(at)X
1852(least)X
2053(the)X
2195(default)X
2487(\(simple\))X
2832(encapsulation.)X
1320 4080(--)N
1409(multipart,)X
1812(although)X
2174(parallel)X
2489(parts)X
2701(may)X
2892(be)X
3009(serialized,)X
3429(with)X
1296 4192(all)N
1436(unrecognized)X
1998(subtypes)X
2377(treated)X
2683(as)X
2806(the)X
2967(default)X
3277(subtype,)X
1296 4304 0.2208(multipart/mixed.)AN
1296 4528(--)N
1412(binary,)X
1734(although)X
2123(no)X
2271(particular)X
2693(subtype)X
3044(recognition)X
3536(is)X
1296 4640(required.)N
1008 4864(4.)N
1140(Upon)X
1389(encountering)X
1928(an)X
2055(unrecognized)X
2611(content-type,)X
3154(an)X
3282 0.2548(implementation)AX
1008 4976(should)N
1302(treat)X
1512(it)X
1604(as)X
1721(if)X
1817(it)X
1908(had)X
2084(a)X
2164(content-type)X
2683(of)X
2800("binary")X
3161(with)X
3369(no)X
3502(parameter)X
1008 5088(sub-arguments.)N
1648(How)X
1860(such)X
2063(data)X
2251(is)X
2342(handled)X
2674(is)X
2765(up)X
2888(to)X
2990(an)X
3108 0.2366(implementation,)AX
3765(but)X
1008 5200(likely)N
1268(options)X
1591(for)X
1743(handling)X
2120(such)X
2336(unrecognized)X
2895(data)X
3096(include)X
3420(offering)X
3770(the)X
1008 5312(user)N
1211(to)X
1329(write)X
1570(it)X
1667(into)X
1860(a)X
1946(\256le)X
2112(\(decoded)X
2508(from)X
2738(its)X
2873(mail)X
3089(transport)X
3475(format\))X
3808(or)X
1008 5424(offering)N
1348(the)X
1496(user)X
1686(to)X
1791(name)X
2030(a)X
2102(program)X
2457(to)X
2561(which)X
2825(the)X
2972(decoded)X
3322(data)X
3512(should)X
3797(be)X
1008 5536(passed)N
1311(as)X
1438(input.)X
1731(Unrecognized)X
2319(prede\256ned)X
2773(types,)X
3048(which)X
3331(might)X
3604(include)X
1008 5648(audio,)N
1270(image,)X
1554(video,)X
1816(or)X
1920(application,)X
2397(should)X
2677(also)X
2856(be)X
2971(treated)X
3258(in)X
3357(this)X
3520(way.)X

33 p
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12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(33)X
2520(-)X
720 688(A)N
820(user)X
1011(agent)X
1251(that)X
1427(meets)X
1683(the)X
1832(above)X
2093(conditions)X
2526(is)X
2622(said)X
2809(to)X
2916(be)X
3039(RFC-XXXX)X
3560(compliant.)X
4026(The)X
720 800(meaning)N
1089(of)X
1206(this)X
1382(phrase)X
1670(is)X
1771(that)X
1953(it)X
2044(is)X
2145(assumed)X
2513(to)X
2625(be)X
2753("safe")X
3023(to)X
3135(send)X
3348(virtually)X
3712(any)X
3888(kind)X
4096(of)X
720 912(properly-marked)N
1395(data)X
1584(to)X
1687(users)X
1912(of)X
2020(such)X
2224(mail)X
2424(systems,)X
2780(because)X
3113(they)X
3307(will)X
3486(at)X
3585(least)X
3791(be)X
3911(able)X
4101(to)X
720 1024(treat)N
923(the)X
1072(data)X
1264(as)X
1375(undifferentiated)X
2022(binary,)X
2323(and)X
2492(will)X
2672(not)X
2825(simply)X
3117(splash)X
3387(it)X
3471(onto)X
3672(the)X
3820(screen)X
4096(of)X
720 1136(unsuspecting)N
1247(users.)X
1541(Of)X
1667(course,)X
1967(there)X
2185(is)X
2274(another)X
2588(sense)X
2821(in)X
2921(which)X
3181(it)X
3260(is)X
3349(always)X
3641("safe")X
3899(to)X
4000(send)X
720 1248(RFC-XXXX)N
1243(format)X
1534(data,)X
1752(which)X
2020(is)X
2117(that)X
2295(it)X
2382(such)X
2591(data)X
2785(will)X
2968(not)X
3124(break)X
3371(or)X
3484(be)X
3608(broken)X
3908(by)X
4037(any)X
720 1360(known)N
1019(systems)X
1361(that)X
1545(are)X
1702(compliant)X
2127(with)X
2337(RFC)X
2557(821)X
2740(and)X
2918(RFC)X
3138(822.)X
3369(User)X
3589(agents)X
3874(that)X
4058(are)X
720 1472(RFC-XXXX)N
1234(compliant)X
1645(have)X
1852(the)X
1995(additional)X
2406(guarantee)X
2806(that)X
2976(the)X
3119(user)X
3304(will)X
3479(not)X
3626(be)X
3741(shown)X
4015(data)X
720 1584(that)N
889(were)X
1100(never)X
1338(intended)X
1694(to)X
1793(be)X
1908(viewed)X
2210(as)X
2314(text.)X

34 p
%%Page: 34 34
12 s 0 xH 0 xS 1 f
10 s
7 f
1 f
12 s
2344 384(-)N
2400(34)X
2520(-)X
3 f
14 s
720 704(Appendix)N
1214(I)X
1286(--)X
1390(Guidelines)X
1928(For)X
2130(Sending)X
2543(Data)X
2802(Via)X
2998(Email)X
1 f
12 s
720 944(Because)N
1074(of)X
1187(the)X
1338(restriction)X
1762(imposed)X
2121(on)X
2250(message)X
2609(bodies)X
2893(by)X
3022(RFC)X
3236(822)X
3413(and,)X
3609(in)X
3717(practice,)X
4080(by)X
720 1056(Message)N
1085(Transport)X
1488(Agents)X
1789(that)X
1963(are)X
2110(more-or-less)X
2625(compliant)X
3040(with)X
3240(RFC)X
3450(821,)X
3646(implementors)X
720 1168(should)N
1006(be)X
1127(careful)X
1425(in)X
1530(several)X
1833(ways)X
2060(regarding)X
2459(mail)X
2661(transport)X
3033(of)X
3143(any)X
3312(data)X
3503(through)X
3832(the)X
3980(mail.)X
720 1280(The)N
919(primary)X
1273(limitations)X
1735(imposed)X
2110(by)X
2255(RFC)X
2485(821)X
2678(are)X
2845(that)X
3039(only)X
3259(seven-bit)X
3661(data)X
3871(may)X
4085(be)X
720 1392(transmitted,)N
1226(and)X
1413(that)X
1606(the)X
1772(data)X
1981(must)X
2217(be)X
2357(broken)X
2673(up)X
2818(into)X
3017(lines)X
3248(of)X
3377(no)X
3522(more)X
3769(than)X
3984(1000)X
720 1504(characters.)N
1214(However,)X
1645(in)X
1775(practice,)X
2160(widely-used)X
2685(MTA's)X
3022(are)X
3195(known)X
3511(to)X
3641(impose)X
3973(some)X
720 1616(additional)N
1130(restrictions.)X
1631(The)X
1806(following)X
2205(guidelines)X
2626(may)X
2817(be)X
2933(useful)X
3193(to)X
3293(anyone)X
3596(devising)X
3947(a)X
4015(data)X
720 1728(format)N
1026(\(content-type\))X
1621(that)X
1815(will)X
2013(survive)X
2344(such)X
2568(MTA's)X
2898(unscathed.)X
3379(\(Note)X
3646(that)X
3839(anything)X
720 1840(encoded)N
1081(in)X
1196(the)X
1355(base64)X
1663(or)X
1784(quoted-printable)X
2462(encodings)X
2893(will)X
3084(satisfy)X
3376(these)X
3615(rules,)X
3867(but)X
4031(that)X
720 1952(some)N
947(well-known)X
1430(mechanisms,)X
1954(notably)X
2267(the)X
2409(UNIX)X
2672(uuencode)X
3065(facility,)X
3387(will)X
3561(not.\))X
1008 2176(\(1\))N
1185(Delimiters)X
1657(other)X
1921(than)X
2153(CR-LF)X
2491(pairs)X
2744(may)X
2976(be)X
3133(used)X
3375(in)X
3516(the)X
3700(local)X
1008 2288(representation)N
1585(of)X
1696(a)X
1770(message)X
2127(on)X
2253(some)X
2486(systems.)X
2868(The)X
3048(persistence)X
3506(of)X
3616(CR-LF)X
1008 2400(pairs)N
1219(should)X
1499(not)X
1646(be)X
1761(relied)X
2005(on.)X
1008 2624(\(2\))N
1153(Isolated)X
1491(CR)X
1652(and)X
1824(LF)X
1969(characters)X
2393(are)X
2544(not)X
2700(well)X
2899(tolerated)X
3270(in)X
3378(general;)X
3722(they)X
1008 2736(may)N
1201(be)X
1319(lost)X
1485(or)X
1592(converted)X
1998(to)X
2099(delimiters)X
2511(on)X
2633(some)X
2862(systems,)X
3216(and)X
3381(hence)X
3632(should)X
1008 2848(not)N
1155(be)X
1270(relied)X
1514(on.)X
1008 3072(\(3\))N
1176(TAB)X
1424(characters)X
1871(may)X
2093(be)X
2240(misinterpreted)X
2854(or)X
2991(may)X
3214(be)X
3362 0.2812(automatically)AX
1008 3184(converted)N
1430(to)X
1547(variable)X
1900(numbers)X
2273(of)X
2395(spaces.)X
2736(This)X
2949(is)X
3055(unavoidable)X
3568(in)X
3685(some)X
1008 3296(environments,)N
1591(notably)X
1915(those)X
2153(not)X
2312(based)X
2567(on)X
2699(the)X
2853(ASCII)X
3139(character)X
3529(set.)X
3696(Such)X
1008 3408(conversion)N
1459(is)X
1552(STRONGLY)X
2092(DISCOURAGED,)X
2831(but)X
2982(it)X
3064(may)X
3258(occur,)X
3524(and)X
3691(users)X
1008 3520(of)N
1112(US-ASCII)X
1540(format)X
1821(should)X
2101(not)X
2248(rely)X
2422(on)X
2542(the)X
2684(persistence)X
3136(of)X
3240(TAB)X
3456(characters.)X
1008 3744(\(4\))N
1149(Lines)X
1392(longer)X
1667(than)X
1862(78)X
1987(characters)X
2407(may)X
2602(be)X
2722(wrapped)X
3082(or)X
3191(truncated)X
3580(in)X
3685(some)X
1008 3856(environments.)N
1626(Line)X
1873(wrapping)X
2306(and)X
2515(line)X
2730(truncation)X
3190(are)X
3377(STRONGLY)X
1008 3968(DISCOURAGED,)N
1767(but)X
1939(unavoidable)X
2459(in)X
2583(some)X
2835(cases.)X
3111(Applications)X
3653(which)X
1008 4080(depend)N
1330(on)X
1470(lines)X
1695(not)X
1861(being)X
2118(wrapped)X
2492(should)X
2791(use)X
2962(mechanisms)X
3481(other)X
3722(than)X
1008 4192(unencoded)N
1449(US-ASCII)X
1877(bodyparts)X
2280(to)X
2379(transmit)X
2719(messages.)X
1008 4416(\(5\))N
1175(Trailing)X
1517("white)X
1801(space")X
2085(characters)X
2507(\(SPACE,)X
2893(TAB,)X
3141(etc.\))X
3342(on)X
3470(a)X
3545(line)X
3722(may)X
1008 4528(be)N
1123(discarded)X
1516(by)X
1636(some)X
1863(transport)X
2229(agents,)X
2523(and)X
2686(hence)X
2935(should)X
3215(not)X
3362(be)X
3477(relied)X
3721(on.)X
720 4752(Please)N
995(note)X
1190(that)X
1364(the)X
1511(above)X
1770(list)X
1917(is)X
2010(NOT)X
2236(a)X
2309(list)X
2457(of)X
2567(recommended)X
3143(practices)X
3516(for)X
3658(MTA's)X
3970(--)X
4064(we)X
720 4864(do)N
854(not)X
1015(recommend)X
1508(that)X
1691(MTA's)X
2011(alter)X
2221(the)X
2377(character)X
2769(of)X
2887(white)X
3139(space,)X
3415(or)X
3533(wrap)X
3762(long)X
3970(lines.)X
720 4976(These)N
979(are)X
1126(known)X
1416(BAD)X
1648(practices)X
2021(on)X
2147(established)X
2605(networks,)X
3011(and)X
3180(implementors)X
3740(must)X
3957(guard)X
720 5088(against)N
1041(the)X
1207(bad)X
1394(effects)X
1699(they)X
1913(can)X
2095(cause.)X
2405(Thus)X
2644(the)X
2809(above)X
3086(might)X
3358(be)X
3496(seen)X
3714(as)X
3841(a)X
3931(list)X
4096(of)X
720 5200(recommended)N
1291(defensive)X
1685(actions)X
1983(to)X
2083(be)X
2199(taken)X
2433(by)X
2555(User)X
2762(Agents)X
3060(to)X
3161(defend)X
3449(themselves)X
3903(against)X
720 5312(the)N
862(known)X
1147(ways)X
1368(in)X
1467(which)X
1726(MTA's)X
2032(sometimes)X
2468(modify)X
2770(messages.)X

35 p
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12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(35)X
2520(-)X
3 f
14 s
720 704(Appendix)N
1214(II)X
1330(--)X
1434(Examples)X
12 s
720 944(Example)N
1107(1)X
1488(Simple)X
1795(Non-ASCII)X
2286(Text)X
2497(Example)X
1 f
720 1168(*****)N
1001(FILL)X
1245(IN)X
1388(HERE)X
1681(WITH)X
1974(AN)X
2154(EXAMPLE)X
2649(OF)X
2813(NON-ASCII)X
3344(TEXT.)X
3680(Can)X
3877(somone)X
720 1280(provide)N
1038(me)X
1180(with)X
1375(a)X
1442(cute)X
1627(example)X
1978(from)X
2189(a)X
2256(non-ASCII)X
2706(character)X
3084(set?)X

36 p
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12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(36)X
2520(-)X
3 f
720 688(Example)N
1107(2)X
1488(A)X
1581(Complex)X
1973(Multipart)X
2403(Example)X
1 f
720 912(What)N
968(follows)X
1295(is)X
1398(the)X
1555(outline)X
1862(of)X
1981(a)X
2063(complex)X
2434(multipart)X
2827(message.)X
3240(This)X
3450(message)X
3815(has)X
3983(three)X
720 1024(parts)N
947(to)X
1062(be)X
1193(displayed)X
1602(serially:)X
1977(an)X
2108(introductory)X
2624(plain)X
2857(text)X
3042(part,)X
3256(an)X
3387(embedded)X
3822(multipart)X
720 1136(message,)N
1109(and)X
1287(a)X
1369(closing)X
1686(encapsulated)X
2223(text)X
2407(message)X
2773(in)X
2888(a)X
2971(non-ASCII)X
3437(character)X
3831(set.)X
4026(The)X
720 1248(embedded)N
1149(multipart)X
1536(message)X
1895(has)X
2056(two)X
2233(parts)X
2453(to)X
2561(be)X
2685(displayed)X
3086(in)X
3193(parallel,)X
3539(a)X
3614(picture)X
3914(and)X
4085(an)X
720 1360(audio)N
958(fragment.)X
7 f
10 s
1008 1568(From:)N
1296(...)X
1008 1664(Subject:)N
1440(...)X
1008 1760(Content-type:)N
1680(multipart;)X
2208(1-s;)X
2448(tweedledum)X
1008 1952(This)N
1248(is)X
1392(a)X
1488(multipart)X
1968(message.)X
1008 2048(Since)N
1296(I've)X
1536(not)X
1728(specified)X
2208(another)X
2592(character)X
3072(set,)X
1008 2144(this)N
1248("prefix")X
1680(area)X
1920(is)X
2064(in)X
2208(US)X
2352(ASCII.)X
1008 2240(--tweedledum)N
1008 2432(...Some)N
1392(more)X
1632(text)X
1872(appears)X
2256(here...)X
1008 2528([Note)N
1296(that)X
1536(the)X
1728(preceding)X
2208(blank)X
2496(line)X
2736(means)X
1008 2624(no)N
1152(header)X
1488(fields)X
1824(were)X
2064(given)X
2352(and)X
2544(this)X
2784(is)X
2928(text,)X
1008 2720(with)N
1248(charset)X
1632(US)X
1776(ASCII.])X
1008 2816(--tweedledum)N
1008 2912(Content-type:)N
1680(multipart;)X
2208(1-p;)X
2448(tweedledee)X
1008 3104(This)N
1248(is)X
1392(a)X
1488(multipart)X
1968(message.)X
1008 3200(If)N
1152(you)X
1344(are)X
1536(reading)X
1920(this)X
2160(text,)X
2448(you)X
2640(might)X
2928(want)X
3168(to)X
1008 3296(consider)N
1440(changing)X
1872(to)X
2016(a)X
2112(user)X
2352(agent)X
2640(that)X
2880(understands)X
1008 3392(how)N
1200(to)X
1344(properly)X
1776(display)X
2160(multipart)X
2640(messages.)X
1008 3488(--tweedledee)N
1008 3584(Content-type:)N
1680(u-law;)X
2016(8000)X
2256(HZ;)X
2448(X-NEXT)X
1008 3680(Content-TransferEncoding:)N
2256(base64)X
1008 3872(...)N
1200(base64-encoded)X
1920(NeXT-format)X
2496(audio)X
2784(data)X
3024(goes)X
3264(here....)X
1008 3968(--tweedledee)N
1008 4064(Content-type:)N
1680(image;)X
2016(G3FAX)X
1008 4160(Content-TransferEncoding:)N
2256(Base64)X
1008 4352(...)N
1200(base64-encoded)X
1920(FAX)X
2112(data)X
2352(goes)X
2592(here....)X
1008 4448(--tweedledee--)N
1008 4544(--tweedledum)N
1008 4640(Content-type:)N
1680(message/ISO-8859-1)X
1008 4832(From:)N
1296(Keld)X
1536(J|rn)X
1776(Simonsen)X
2208(\(name)X
2496(can)X
2688(be)X
2832(non-ASCII\))X
1008 4928(Subject:)N
1440(whatever)X
1008 5024(Content-type:)N
1680(Text/ISO-8859-1)X
1008 5120(Content-TransferEncoding:)N
2256(Quoted-printable)X
1008 5312(...)N
1200(Closing)X
1584(text)X
1824(goes)X
2064(here)X
2304(...)X
1008 5408(--tweedledum--)N

37 p
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10 s 0 xH 0 xS 7 f
12 s
1 f
2344 400(-)N
2400(37)X
2520(-)X
3 f
14 s
720 704(Summary)N
1 f
12 s
720 944(Using)N
989(the)X
1147(Content-Type)X
1722(and)X
1901(Content-TransferEncoding)X
2974(header)X
3272(\256elds,)X
3545(it)X
3640(is)X
3745(possible)X
4101(to)X
720 1056(include,)N
1061(in)X
1169(a)X
1245(standardized)X
1765(way,)X
1982(arbitrary)X
2347(types)X
2583(of)X
2696(data)X
2890(objects)X
3196(with)X
3400(RFC)X
3614(822)X
3790(compliant)X
720 1168(mail)N
925(messages.)X
1345(No)X
1495(restrictions)X
1956(imposed)X
2315(by)X
2444(either)X
2698(RFC)X
2913(821)X
3091(or)X
3205(RFC)X
3420(822)X
3598(or)X
3712(broken,)X
4037(and)X
720 1280(care)N
914(has)X
1074(been)X
1288(taken)X
1529(to)X
1636(avoid)X
1882(problems)X
2272(caused)X
2566(by)X
2694(additional)X
3112(restrictions)X
3572(imposed)X
3930(by)X
4058(the)X
720 1392(characteristics)N
1327(of)X
1463(some)X
1722(Internet)X
2078(mail)X
2306(transport)X
2704(mechanisms)X
3236(\(see)X
3447(Appendix)X
3882(I\).)X
4026(The)X
720 1504("multipart")N
1195(and)X
1377("message")X
1824(content-types)X
2386(allow)X
2643(mixing)X
2958(and)X
3139(heirarchical)X
3637(structuring)X
4096(of)X
720 1616(objects)N
1024(of)X
1135(different)X
1498(types)X
1732(in)X
1838(a)X
1912(single)X
2173(message.)X
2554(Further)X
2868(content-tyes)X
3370(allow)X
3615(a)X
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3049(image,)X
3336(or)X
3443(several)X
3743(other)X
3968(kinds)X
720 1840(of)N
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2400(provide)X
2727(conventional)X
3258(mechanisms)X
3767(for)X
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1183(deemed)X
1540(desirable)X
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2369(implementors.)X
3003(Finally,)X
3356(a)X
3455(number)X
3805(of)X
3941(useful)X
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1263(are)X
1405(de\256ned)X
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2156(use)X
2308(by)X
2428(consenting)X
2869(user)X
3053(agents.)X
3 f
14 s
720 2304(Contacts)N
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12 s
720 2544(For)N
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2722(may)X
2912(be)X
3027(contacted)X
3421(via)X
3563(Internet)X
3887(mail:)X
2 f
1428 2768(Nathaniel)N
1832(Borenstein)X
2273(<[e-mail]>)X
1806 2880(Ned)N
1985(Freed)X
2239(<[e-mail]>)X
3 f
14 s
720 3120(Acknowledgements)N
1 f
12 s
720 3360(This)N
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2795(large)X
3026(number)X
3358(of)X
3476(people,)X
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3903(several)X
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1560(on)X
1706(the)X
1874(IETF-SMTP)X
2409(and)X
2598(IETF-822)X
3027(mailing)X
3372(lists.)X
3625(Although)X
4037(any)X
720 3584(enumeration)N
1228(seems)X
1489(doomed)X
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3509(Atkinson,)X
3941(Kevin)X
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1081(Mark)X
1317(Crispin,)X
1653(Dave)X
1885(Crocker,)X
2248(Walt)X
2465(Daniels,)X
2812(Frank)X
3065(Dawson,)X
3432(Hitoshi)X
3744(Doi,)X
3941(Kevin)X
720 3920(Donnelly,)N
1137(Johnny)X
1449(Eriksson,)X
1843(Craig)X
2091(Everhart,)X
2481(Roger)X
2750(Fajman,)X
3097(Alain)X
3345(Fontaine,)X
3740(Phil)X
3929(Gross,)X
720 4032(David)N
991(Herron,)X
1323(Bruce)X
1589(Howard,)X
1958(Bill)X
2139(Janssen,)X
2493(Risto)X
2733(Kankkunen,)X
3237(Phil)X
3429(Karn,)X
3682(Tim)X
3880(Kehres,)X
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926(Katin,)X
1204(Steve)X
1458(Kille,)X
1715(Anders)X
2032(Klemets,)X
2417(John)X
2638(Klensin,)X
3001(Vincent)X
3346(Lau,)X
3560(Timo)X
3809(Lehtinen,)X
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961(MacMillan,)X
1473(Rick)X
1716(McGowan,)X
2206(Leo)X
2417(Mclaughlin,)X
2946(Goli)X
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3962(Keith)X
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1036(Mark)X
1280(Needleman,)X
1779(John)X
1996(Noerenberg,)X
2509(David)X
2779(J.)X
2875(Pepper,)X
3201(Jonathan)X
3578(Rosenberg,)X
4048(Jan)X
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1114(Mark)X
1361(Sherman,)X
1766(Keld)X
1992(Simonsen,)X
2434(Bob)X
2633(Smart,)X
2927(Einar)X
3176(Stefferud,)X
3598(Michael)X
3954(Stein,)X
720 4592(Taro)N
949(Suzuki,)X
1286(Steve)X
1546(Uhler,)X
1835(Stuart)X
2111(Vance,)X
2451(Erik)X
2663(van)X
2848(der)X
3017(Poel,)X
3258(Peter)X
3502(Vanderbilt,)X
3984(Greg)X
720 4704(Vaudreuil,)N
1158(Brian)X
1401(Wideen,)X
1754(Glenn)X
2018(Wright,)X
2344(and)X
2512(David)X
2777(Zimmerman.)X
3308(The)X
3488(authors)X
3801(apologize)X
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856(any)X
1019(omissions)X
1427(from)X
1638(this)X
1801(list,)X
1967(which)X
2226(were)X
2437(certainly)X
2799(unintentional.)X

38 p
%%Page: 38 38
12 s 0 xH 0 xS 1 f
2344 400(-)N
2400(38)X
2520(-)X
3 f
14 s
720 704(References)N
1 f
12 s
720 944([REF-ISO646])N
1386(International)X
1975(Standard--Information)X
2937(Processing--ISO)X
3667(7-bit)X
3946(coded)X
720 1056(character)N
1098(set)X
1229(for)X
1365(information)X
1844(interchange,)X
2342(ISO)X
2520(646:1983.)X
720 1280([REF-ISO-2022])N
1417(International)X
1957(Standard--Information)X
2871(Processing--ISO)X
3553(7-bit)X
3783(and)X
3994(8-bit)X
720 1392(coded)N
974(character)X
1352(sets--Code)X
1787(extension)X
2180(techniques,)X
2640(ISO)X
2818(2022:1986.)X
720 1616([REF-ANSI])N
1268(Coded)X
1572(Character)X
2000(Set--7-Bit)X
2439(American)X
2873(Standard)X
3269(Code)X
3526(for)X
3716(Information)X
720 1728(Interchange,)N
1223(ANSI)X
1470(X3.4-1986.)X
720 1952([REF-X400])N
1261(Schicker,)X
1654(Pietro,)X
1940("Message)X
2348(Handling)X
2739(Systems,)X
3116(X.400",)X
3449(Message)X
3818(Handling)X
720 2064(Systems)N
1068(and)X
1235(Distributed)X
1696(Applications,)X
2240(E.)X
2351(Stefferud,)X
2761(O-j.)X
2941(Jacobsen,)X
3340(and)X
3507(P.)X
3612(Schicker,)X
4000(eds.,)X
720 2176(North-Holland,)N
1334(1989,)X
1574(pp.)X
1718(3-41.)X
720 2400([RFC-821])N
1207(Postel,)X
1532(J.B.)X
1771(Simple)X
2110(Mail)X
2358(Transfer)X
2750(Protocol.)X
3190(August,)X
3557(1982,)X
3840(Network)X
720 2512(Information)N
1204(Center,)X
1509(RFC-821.)X
720 2736([RFC-822])N
1238(Crocker,)X
1621(D.)X
1787(Standard)X
2178(for)X
2339(the)X
2506(format)X
2812(of)X
2941(ARPA)X
3245(Internet)X
3594(text)X
3789(messages.)X
720 2848(August,)N
1045(1982,)X
1285(Network)X
1645(Information)X
2129(Center,)X
2434(RFC-822.)X
720 3072([RFC-934])N
1219(Rose,)X
1465(M.T.;)X
1714(Stefferud,)X
2126(E.A.)X
2356(Proposed)X
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3099(for)X
3241(message)X
3622(encapsulation.)X
720 3184(January,)N
1067(1985,)X
1307(Network)X
1667(Information)X
2151(Center,)X
2456(RFC-934.)X
720 3408([RFC-1049])N
1239(Sirbu,)X
1497(M.A.)X
1749(Content-type)X
2278(header)X
2561(\256eld)X
2758(for)X
2896(Internet)X
3222(messages.)X
3659(March,)X
3960(1988,)X
720 3520(Network)N
1080(Information)X
1564(Center,)X
1869(RFC-1049.)X
720 3744([RFC-1113])N
1240(Linn,)X
1473(J.)X
1585(Privacy)X
1906(enhancement)X
2443(for)X
2583(Internet)X
2911(electronic)X
3320(mail:)X
3547(Part)X
3730(I)X
3790(-)X
3850(message)X
720 3856(encipherment)N
1270(and)X
1434 0.2356(authentication)AX
2006(procedures)X
2452([Draft].)X
2791(August,)X
3116(1989,)X
3356(Network)X
3716(Information)X
720 3968(Center,)N
1025(RFC-1113.)X
720 4192([RFC-1154])N
1251(Robinson,)X
1681(D.;)X
1839(Ullmann,)X
2239(R.)X
2390(Encoding)X
2798(header)X
3094(\256eld)X
3304(for)X
3455(internet)X
3789(messages.)X
720 4304(April,)N
971(1990,)X
1211(Network)X
1571(Information)X
2055(Center,)X
2360(RFC-1154.)X
720 4528([REF-ISO-10646])N
1442(************)X
720 4752([REF-ISO-8859])N
1394(**********)X

38 p
%%Trailer
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