Re: [vwrap] The <embed> tag... is the group still interested in LLSD or DSD?
Dahlia Trimble <dahliatrimble@gmail.com> Sat, 07 May 2011 07:50 UTC
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Date: Sat, 07 May 2011 00:45:17 -0700
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From: Dahlia Trimble <dahliatrimble@gmail.com>
To: Joshua Bell <josh@lindenlab.com>
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Subject: Re: [vwrap] The <embed> tag... is the group still interested in LLSD or DSD?
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I believe python supports very large integers. Try this in your python interpreter: >>> bigint = 2**(2**16) >>> print bigint I first became aware of missing integer types in LLSD when I was coding the event queue messages to support group chat in OpenSimulator. It seems that "region handles" are 64 bit integers in the LL protocols but are encoded as a base64 encoded binary blob in LLSD as LLSD has no support for integers larger than 32 bits. I suspect that changing LLSD to have larger integer types might create some compatibility issues with existing implementations that expect to use the binary blob. On Fri, May 6, 2011 at 9:18 AM, Joshua Bell <josh@lindenlab.com> wrote: > On Thu, May 5, 2011 at 11:46 PM, Vaughn Deluca <vaughn.deluca@gmail.com>wrote: > >> >> What were the reasons to allow onl a single integer type? There must have >> been a good arguments for that? >> > > IIRC, some of the languages we wished to support (Python comes to mind) did > not have support for integers larger than 32-bits. ECMAScript doesn't have > integer number types at all only IEEE 754 64-bit floats; if you constrain > the input and output to 32-bit integers it can represent those accurately, > but not 64-bit integers. > > If you look at the history of LLSD, it started with 3 serialization formats > that explicitly specified the type of values - XML, binary, and "notation" - > a compact text serialization intermediate in size between binary and XML. > The IETF drafts dropped notation and added JSON. The JSON serialization was > "lossy" as LLSD describes types and values that don't exist in JSON > (Integer, Date, UUID, NaN, Infinity, etc). By design, though, the type > conversions described in the LLSD Draft accommodate e.g. by serializing a > Date as an ISO 8601 string, which when interpreted as a date by the receiver > results in the original Date by the string->date conversion rules. (I don't > know if we had resolved every issue with JSON serialization; certainly, > discussion about edge cases on this list never made it into a draft). > > As far as adding new types: I believe there was the belief that this could > be accommodated by defining an "LLSD2" at some point in the future with a > distinct MIME type for serializations (e.g. application/llsd2+xml); unlike > the Web, content negotiation over HTTP was assumed to be functional within > VWRAP interoperation. Therefore, there was no push to ensure LLSD "v1" was > internally extensible or comprehensive for all imaginable scalar/structured > types. > > Anyway... if contributors have implementation of abstract data type systems > that share characteristics with LLSD and are thinking about adding > additional scalar/structured types, they should look at the issues with both > implementation languages and serialization formats. > > -- Josh > > > _______________________________________________ > vwrap mailing list > vwrap@ietf.org > https://www.ietf.org/mailman/listinfo/vwrap > >
- Re: [vwrap] is the group still interested in LLSD… Morgaine
- Re: [vwrap] is the group still interested in LLSD… Dzonatas Sol
- [vwrap] is the group still interested in LLSD or … Meadhbh Hamrick
- Re: [vwrap] is the group still interested in LLSD… Morgaine
- Re: [vwrap] is the group still interested in LLSD… Dzonatas Sol
- Re: [vwrap] is the group still interested in LLSD… Morgaine
- Re: [vwrap] is the group still interested in LLSD… Dzonatas Sol
- Re: [vwrap] is the group still interested in LLSD… Meadhbh Hamrick
- Re: [vwrap] is the group still interested in LLSD… Dzonatas Sol
- Re: [vwrap] is the group still interested in LLSD… Morgaine
- Re: [vwrap] is the group still interested in LLSD… Dzonatas Sol
- Re: [vwrap] is the group still interested in LLSD… Morgaine
- Re: [vwrap] is the group still interested in LLSD… Dzonatas Sol
- Re: [vwrap] is the group still interested in LLSD… Morgaine
- Re: [vwrap] ADT? is the group still interested in… Dzonatas Sol
- Re: [vwrap] ADT? is the group still interested in… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Vaughn Deluca
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Vaughn Deluca
- Re: [vwrap] The <embed> tag... is the group still… Joshua Bell
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dahlia Trimble
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Meadhbh Hamrick
- [vwrap] Python integer types (was: The <embed> ta… Boroondas Gupte
- Re: [vwrap] The <embed> tag... is the group still… Meadhbh Hamrick
- Re: [vwrap] The <embed> tag... is the group still… Meadhbh Hamrick
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Meadhbh Hamrick
- [vwrap] Python integer types, again (was: The <em… Boroondas Gupte
- Re: [vwrap] Python integer types (was: The <embed… Meadhbh Hamrick
- Re: [vwrap] Python integer types, again (was: The… Meadhbh Hamrick
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol
- Re: [vwrap] The <embed> tag... is the group still… Robert G. Jakabosky
- Re: [vwrap] The <embed> tag... is the group still… Morgaine
- Re: [vwrap] The <embed> tag... is the group still… Dzonatas Sol