- From: Axel Polleres <axel.polleres@deri.org>
- Date: Mon, 11 Aug 2008 18:30:16 +0100
- To: Jie Bao <baojie@cs.rpi.edu>
- CC: public-rdf-text@w3.org
It was only Addison and me in the call, so I just summarize by putting some comments inline to my summary sent before, see below. Jie, if you are ok with that, and nobody else objexcts, I will try - over the next week - to incorporate this statues into http://www.w3.org/2007/OWL/wiki/InternationalizedStringSpec best, Axel Jie Bao wrote: > There is an unplanned emergence meeting I have to attend right now. > Sorry for missing the meeting today. I will check the irc log for > summary. > > Jie > > On Mon, Aug 11, 2008 at 12:59 PM, Axel Polleres <axel.polleres@deri.org> wrote: >> Let me attempt to summarize what "is left" from last time and where we >> seemed (from my point of view) to agree... this should give us kind of an >> agenda for today. >> >> best, >> Axel >> ------------- >> >> Summarizing starting points for today: >> >> 1) We seemed to agree last time on the following: >> >> *) One datatype rdf:text >> >> *) value space for rdf:text: >> >> pairs such that the first argument of the pair is a Unicode string >> and the second one is a valid language tag following >> http://www.rfc-editor.org/rfc/rfc4646.txt >> >> *) lexical space (notation in presentation syntax): >> >> "string@tag"^^rdf:text >> >> rather than >> >> (string, tag)^^rdf:text >> >> with shortcut notation: >> >> "string"@tag Addison and I agreed that the for the lang tag we would allow the same lexical space as xml:lang. Actually, xml:lang is defineid implicitly anyway, referencing BCP 47, BTW, see also the last issue, below. >> 2) We seemed to agree last time that subtag matching according to RFC4647 >> can be done by built-ins in RIF and datatype facets in OWL: >> >> - for RIF this means a builtin: >> >> pred:matches-langtag( arg1 , arg2 ) >> >> intended domains: >> - arg1 rdf:text >> - arg2 valid language range according to >> http://www.rfc-editor.org/rfc/rfc4647.txt >> >> - for OWL this means: >> >> ??? Jie to elaborate on datatype-facets in OWL. Jie, please elaborate. Actually, this doesn't seem to need to go into http://www.w3.org/2007/OWL/wiki/InternationalizedStringSpec but is rather part of the OWL spec. Can you send a pointer again, where the datatype facets of OWL2 are explained in more detail? >> 3) Issue 1: What about "subtypes" which cannot be determined by sub-pattern >> matching? >> >> "art-lojban" and "jbo" >> "zh-cmn" or "cmn" or "zh" >> >> see http://lists.w3.org/Archives/Public/public-owl-wg/2008Jul/0288.html The replacement for RFC4646 will resolve that by defining formal canonicalization for lang tags which can be seen as a preprocessing step for the langpattern matching of RFC4647 ... This relates to issue 3 below: If we reference BCP 47 instead of RFC4646 we would get this "update" for free. Addison says that lang tags are always defined in a forward-compatible manner, so we shouldn't run into trouble with that. >> 4) Issue 2: xs:string >> >> did we agree on here xs:string is located here, i.e. whether it should be >> the subtype od rdf:text with an empty lang-tag? >> >> Note that would mean that >> >> "blabla"^^xs:string is syntactic sugar for "blabla@"^^rdf:text, Addison and I both agreed that defining rdf:text as a supertyp of xs:string would be desirable... the question is more: Are we "allowed" to do this or would it have implications to existing XML specs? >> What about "blabla" (aka plain literal in RDF)? is this also a shortcut for >> "blabla@"^^rdf:text? We didn't touch that issue at the moment. In RIF, currently there is no distinction made between "plain" literals and xs:string. >> 5) Issue 3: Whether to supersede RFC 3066 (the one used by RDF and currently >> by RIF) with RFC 4646 (Tags for Identifying Languages) ... >> I kind of imagine tat I sensed last time agreement towards the newer spec >> RFC4646, would that cause trouble wrt 3066 upwards-compatibility? Kind of >> similar to the "plain literals" issue 2 above. BCP 47, see above. best, Axel -- Dr. Axel Polleres, Digital Enterprise Research Institute (DERI) email: axel.polleres@deri.org url: http://www.polleres.net/ Everything is possible: rdfs:subClassOf rdfs:subPropertyOf rdfs:Resource. rdfs:subClassOf rdfs:subPropertyOf rdfs:subPropertyOf. rdf:type rdfs:subPropertyOf rdfs:subClassOf. rdfs:subClassOf rdf:type owl:SymmetricProperty.
Received on Monday, 11 August 2008 17:31:18 UTC