aboutEach: attr val use/mention bug

• From: Dan Connolly <connolly@w3.org>
• Date: Mon, 04 Jun 2001 15:41:51 -0500
• To: www-rdf-comments@w3.org
• Message-ID: <3B1BF28F.2E6EF42E@w3.org>

Regarding:
  The value of an aboutEach attribute must be a
  container.
  -- https://www.w3.org/TR/REC-rdf-syntax/#containers
That seems to be a use/mention bug:
The value of an aboutEach attribute is a URI reference;
one that *denotes* a collection, no?
The spec continues:
  Using a distributive referent on a container is the same
  as making all the statements about each of the members
  separately. 
but that doesn't clearly specify how to determine the
members of a container.
For example, consider using a subproperty of rdf:_2
to specify the second member of a collection:
<rdf:RDF xmlns:rdf="https://www.w3.org/1999/02/22-rdf-syntax-ns#"
  xmlns:rdfs="https://www.w3.org/2000/01/rdf-schema#"
  xmlns:ex="https://example/vocab#">
  <r:Description r:about="#books"
  xmlns:r="https://www.w3.org/1999/02/22-rdf-syntax-ns#">
    <r:type
    r:resource="https://www.w3.org/1999/02/22-rdf-syntax-ns#Bag" />
    <r:_1 r:resource="#book1" />
    <ex:member2 r:resource="#book2" />
    <r:_3 r:resource="#book3" />
  </r:Description>
  <rdf:Description rdf:aboutEach="#books">
    <dc:rights xmlns:dc="https://purl.org/dc/elements/1.1/">all
    mine!</dc:rights>
  </rdf:Description>
  <rdf:Description rdf:about="https://example/vocab#member2">
    <rdfs:subPropertyOf
rdf:resource="https://www.w3.org/1999/02/22-rdf-syntax-ns#_2"/>
  </rdf:Description>
</rdf:RDF>
What are the members of #books? is #book2 one of them?
I can deduce, from the specification of rdfs:subProperty,
that it is. But knowledge of rdfs:subProperty is not
required for parsing rdf:aboutEach syntax, is it?
I tried it with SiRPAC and got:
///////
Errors during parsing
Fatal error: Unresolved internal reference to books
   (Line number = 25, Column number = 4)
\\\\\\\
-- 
Dan Connolly, W3C https://www.w3.org/People/Connolly/

Received on Monday, 4 June 2001 16:41:58 UTC