Re: Can RDFa be used on XML: pharma information

[Rick Jelliffe]

Egon Willighagen wrote:
The problem here is to define what attributes your XML will use to
define the RDFa hooks... what attributes will define a new subject,
the predicate, and how you define the object...

  
Yes, we lose the  html:base element and html:link, but why would we lose 
the predicates?   @rel and @rev would presumably be available on any 
element: couldn't it be used so that instead of

<div about="http://dbpedia.org/resource/Albert_Einstein";>
 <span property="foaf:name">Albert Einstein</span>
 <span property="dbp:dateOfBirth" datatype="xsd:date">1879-03-14</span>
 <div rel="dbp:birthPlace" resource="http://dbpedia.org/resource/Germany";>
   <span property="dbp:conventionalLongName">Federal Republic of Germany</span>
 </div>
</div>

I can have

<person about="http://dbpedia.org/resource/Albert_Einstein";>
 <name property="foaf:name">Albert Einstein</name>
 <dob property="dbp:dateOfBirth" datatype="xsd:date">1879-03-14</dob>
 <nation rel="dbp:birthPlace" resource="http://dbpedia.org/resource/Germany";>
   <name property="dbp:conventionalLongName">Federal Republic of Germany</name>
 </nation>
</person>

It seems to me that where-ever RDFa does not rely on HTML semantics, it 
"should" be free (there is no conceptual impediment) to use on XML: it 
can certainly determine whether an XML element has a legit XMLliteral or 
mixed or element content.

Because the XML is using a local namespace, it will be unrecognizable
for any client... however, given you define those attributes (or via
new elements), you should be able to embed this RDFa in the HTML more
easily too...
  
What is the necessary difference, for an RDFa engine, between

<span about="urn:ISBN:0091808189" typeof="biblio:book"
          property="dc:title">
     Canteen Cuisine
</span>

and

<my:book about="urn:ISBN:0091808189" typeof="biblio:book"
          property="dc:title">
     Canteen Cuisine
</my:book>

Cheers
Rick Jelliffe