- From: Patrick Stickler <patrick.stickler@nokia.com>
- Date: Fri, 28 Jun 2002 12:43:54 +0300
- To: RDF Core <w3c-rdfcore-wg@w3.org>
- CC: ext Brian McBride <bwm@hplb.hpl.hp.com>, Pat Hayes <phayes@ai.uwf.edu>, ext Sergey Melnik <melnik@db.stanford.edu>
Given the majority views expressed at the Bristol f2f and subsequent discussion on the WG list, I put forth to the WG the following proposal for closure of rdfs-xml-schema-datatypes: Concisely: 1. Literals are syntactically (and semantically) untidy in the graph and literal nodes denote datatype values (we choose test D in the unsent inquiry regarding tidyness/untidyness). 2. rdfs:range is used for global datatyping of property values. 3. The only new vocabulary is rdfs:Datatype which is used to identify RDF classes which denote datatypes, and we use the XML Schema defined URIs to denote those datatypes. 4. There are only two idioms: a) global/implicit Jenny ex:age _:x"10" . ex:age rdfs:range xsd:integer . b) local/explicit Bob ex:age _:y . _:y xsd:integer _:z"10" . [If literals are permitted to be subjects, then idiom 4(b) is replaced with normal RDF typing: b') local/explicit Bob ex:age _:y"10" . _:y rdf:type xsd:integer . Note that if literals are not permitted to be subjects now, but are permitted in RDF 2.0, then 4(b) above is fully semantically analogous to, and anticipates 4(b')] 5. We adopt the above-used notation for denoting untidy literal nodes in NTriples, where the original occurrence as object includes a nodeID and the literal string, and (if permitted) triples with the literal as subject include only the nodeID. The above are to be taken as modifications/corrections to the present datatyping WD. I propose that the above be approved by the WG, incorporated into the datatyping WD and published for review by the RDF community as soon as possible, ideally by July 5th. This will close the final open issue rdfs-xml-schema-datatypes and put us well on the way towards meeting a last call for the datatyping specification by Aug 26th. I ask that the WG would vote on this proposal during today's concall (June 28), and if adopted, reserve the bridge afterwards for discussion by the datatyping editors and any other parties regarding modification, completion, and publication of the WD. Regards, Patrick -- Patrick Stickler Phone: +358 50 483 9453 Senior Research Scientist Fax: +358 7180 35409 Nokia Research Center Email: patrick.stickler@nokia.com
Received on Friday, 28 June 2002 05:39:23 UTC