Re: XML schema and RDF datatypes [was: comments...]

From: Pat Hayes (
Date: 10/02/01

>It's also possible to design a language where the type of
>a literal may *depend* on a declaration from an XML schema:
>	<kr:KRLang xmlns:rdf=""
>		xmlns:ex="http://example/vocab">
>	<ex:Person>
>	  <ex:name>John Doe</ex:name>
>	  <ex:shoeSize>10</ex:shoeSize>
>	</ex:Person>
>so that the "10" above is not a logical constant at all;
>not until you find a/the schema for http://example/vocab
>do you know how to parse/interpret "10"... i.e. the
>meaning of that chunk of XML is dependent on all the
>trust issues around following links from one document
>to another (not to mention a complete implementation
>of XML Schema, an effort several orders of magnitude
>larger than an RDF 1.0 parser).

That is what I was thinking of in an earlier reply to you on this 
topic (on rdf-logic), but I didn't fully appreciate the force of the 
doctrinal imperative:

>This sort of language is not a candidate for a future
>version of RDF: it fails to meet
>one of the basic requirements of RDF: that an RDF document
>stands on its own as a logical formula.


OK, then I will stop going on about it.


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