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Re: use cases for Literal? RSS? Dublin Core? PRISM? DAML? XAP?

From: Dan Connolly <connolly@w3.org>
Date: Thu, 11 Oct 2001 17:54:19 -0500
Message-ID: <3BC6231B.38517C3E@w3.org>
To: Jeremy Carroll <jjc@hplb.hpl.hp.com>
CC: w3c-rdfcore-wg@w3.org
Jeremy Carroll wrote:
[...]
> I would not be opposed to deleting parseType="Literal"

I would prefer that to the extremely loose interpretation you're
suggesting...

> The only use case I have been told about is for cheap and cheerful tools
> which involving typing RDF in directly where people want to put some
> HTML in a value.
> 
> <rdf:Description>
> <rdf:value rdf:parseType="Literal">I <EM>did</EM> tell you</rdf:value>
> </rdf:Description>

Yes, that's the use case I keep hearing too...

> In my previous ramblings on the topic, which I still owe the WG a second
> attempt at, I have suggested that:
> 1) any reasonable attempt at representing an XML Literal should be
> permissable.

Your .nt attachment suggests that represtentations that are
indistinguishable from strings are OK. That's going to far, for me.


> Taking your challenge and following 2, I attach an n-triples file.
> 
> The literal, (in pieces that need to be concatenated is)
> 
> "\n      Ramifications of\n         <apply xmlns=\"http://www"
> ".w3.org/TR/REC-mathml\" xmlns:dc=\"http://purl.org/metadata/d"
> "ublin_core#\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-sy"
> "ntax-ns#\">\n        <power></power>\n        <apply>\n      "
> "    <plus></plus>\n          <ci>a</ci>\n          <ci>b</ci>"
> "\n        </apply>\n        <cn>2</cn>\n      </apply>\n     "
> " to World Peace\n    "

That doesn't make it clear that it's a parseType="Literal"
value.

That .nt file (after I put a period at the end
of the last line) also corresponds to this RDF/XML input:

<rdf:RDF xmlns="http://purl.org/metadata/dublin_core#"
    xmlns:log="http://www.w3.org/2000/10/swap/log#"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
 
    <rdf:Description rdf:about="http://mycorp.com/papers/NobelPaper1">
        <Creator>David Hume</Creator>
        <Title>
      Ramifications of
         &#60;apply xmlns="http://www.w3.org/TR/REC-mathml"
xmlns:dc="http://purl.org/metadata/dublin_core#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"&#62;
        &#60;power&#62;&#60;/power&#62;
        &#60;apply&#62;
          &#60;plus&#62;&#60;/plus&#62;
          &#60;ci&#62;a&#60;/ci&#62;
          &#60;ci&#62;b&#60;/ci&#62;
        &#60;/apply&#62;
        &#60;cn&#62;2&#60;/cn&#62;
      &#60;/apply&#62;
      to World Peace
    </Title>
    </rdf:Description>
</rdf:RDF>



-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/
Received on Thursday, 11 October 2001 18:55:22 EDT

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