Re: [apps-discuss] [Uri-review] New version of tn3270 draft

[Julian Reschke <[e-mail]>]

On 28.11.2010 12:26, Mykyta Yevstifeyev wrote:
> ...
>> Please have a look at RFC 3986 and consider just re-using the syntax
>> from over there, if it matches.
> Yes, it is just reusing. tn3270 is telnet3270 in fact. tn stands as
> acronym for telnet.
> ...

That doesn't seem to be a reply to what I said.

> ...
>> Actually, that is not the case. The ABNF needs to say what the
>> character repertoire for these parts is, and the prose needs to state
>> whether there's an escaping mechanism that can be used to map more
>> characters into this syntax.
> I'll put smth. like 'user = *VCHAR' there.

That would make the ABNF ambiguous. You need to exclude certain 
characters so that the other components can be detected. Again, by any 
means, have a look at RFC 3986.

> ...
>> Furthermore:
>>
>> URI scheme encoding considerations: tn3270 scheme uses UTF-8 (see RFC
>> 3629 [RFC3629] for details) for encoding data. No internalization is
>> intended
>>
>> URIs do not contain non-ASCII characters. What you *could* say is that
>> if the URI is built from components that *do* allow non-ASCII
>> characters, such as the username, you need to map them to octets using
>> UTF-8. But then you say "no internalization is intended"? What is it?
>> How does IDNA work here?
> Generally HOST is an IP address and it is will be very few
> cases when THIS scheme will be used with internationalized
> DNS names.

OK, in that case you should say that non-ASCII characters in the host 
name component should be treated as per the IRI spec, Section xyz.

>> Also, in the Normative References, you may want to check whether all
>> of these are normative. For instance, the "telnet" scheme is only
>> cited in the security considerations section, so I don't see why it
>> would be normative.
> We import a section (or a part of a section) of telnet scheme
> spec. to this document. It is Normative only.

OK, let's agree to disagree on this one :-).

Best regards, Julian