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Re: Valid RDF and security

  • From: "Rick Jelliffe" <ricko@a...>
  • To: <xml-dev@i...>
  • Date: Tue, 16 Feb 1999 17:10:18 +1100

qualified dublin core rdf

From: Robb Shecter <shecter@d...>

>A week or so ago, someone asked how a piece of RDF can be validated,
>analogous to the way that a piece of XML can be validated with a DTD.
I
>don't think anybody answered this, or I missed the answer. (?)  I'm new
>to RDF, and don't know the answer, because as I understand it,
>validating RDF would mean making sure that the document properly
follows
>(say) Dublin Core, and DC is defined as a schema, not as a DTD. (?)

My impression is that the simple Dublin Core people are primarily
interested in making HTML manageable for information discovery. The
qualified Dublin Core people are more concerned with using the simple
Dublin Core as classes; all the QDC  people I have talked to (from ECAI,
etc) are more concerned with making a schema for  centralized databases,
and relatively uninterested in "serialization" issues. This is why the
Dublin Core does not have any concrete element sets; sooner or later
they will want to distribute the processing, and presumably then they
might get around to it.

I noticed that HTML 4 has some definite markup for allowing different
profiles on the metatags, to support Dublin Core. But the examples of
Dublin Core in HTML that the practitioners of it use don't seem to
conform. And I have seen examples given of "how to use DC in HTML 3 and
HTML4" which give different methods. I don't think there is much
awareness that rigorous markup involves more than just defining a field.

As far as validating RDF, you might be interested in a little note I
wrote "Using XSL to Validate Structured Documents"
    http://www.ascc.net/xml/en/utf-8resource_index.html
You can use XSL to write a very simple validation program that gives
nice error messages and works with wrappers or islands.

Rick Jelliffe



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