Re: ISSUE-83 (CURIEs must require colon): CURIEs are dangerous when used in combination with @vocab and @about [LC Comment - RDFa Core 1.1]

Interesting. I ran your example through my code and it produced the right triples. Looking at it a bit further I also realized that I implemented as you propose, ie, that a CURIE must have a ':' in it. I guess it is a leftover from the earlier version for RDFa 1.0...

Ivan

On Feb 6, 2011, at 24:27 , RDFa Working Group Issue Tracker wrote:

> 
> ISSUE-83 (CURIEs must require colon): CURIEs are dangerous when used in combination with @vocab and @about [LC Comment - RDFa Core 1.1]
> 
> http://www.w3.org/2010/02/rdfa/track/issues/83
> 
> Raised by: Nathan Rixham
> On product: LC Comment - RDFa Core 1.1
> 
> There is a bug in the CURIE syntax in RDFa Core where seemingly innocuous markup like the following will result in a set of surprising triples:
> 
> <div vocab="http://xmlns.com/foaf/0.1/" about="#me">
>   My name is <span property="name">John Doe</span> and my blog is called
>   <a rel="homepage" href="http://example.org/blog/">Understanding Semantics</a>.
> </div>
> 
> The markup above, when processed via RDFa Core 1.1 processing rules will result in the following triples:
> 
> <http://xmlns.com/foaf/0.1/#me>
>   <http://xmlns.com/foaf/0.1/name>
>      "John Doe" .
> <http://xmlns.com/foaf/0.1/#me>
>   <http://xmlns.com/foaf/0.1/homepage>
>      <http://example.org/blog/> .
> 
> Note that the subject is wrong. The subject should have been to a fragment identifier for the current page but since "#me" is a valid CURIE when used in conjunction with @vocab, the wrong subject is generated.
> 
> The solution to this problem must not create backward incompatibilities and must allow the usage of @vocab.
> 
> 
> 


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Ivan Herman, W3C Semantic Web Activity Lead
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