33196 - no support for aboutEach

Status: VERIFIED WONTFIX

(Core Graveyard :: RDF, enhancement, P3)

Description

[Chris Waterson]

The Mozilla RDF/XML parser does not support the "aboutEachAttr" rule [6.8].

I believe the correct way to support this is to add a "aboutEachAttr 
derivation" datasource that can be added to filter queries. It will wrap 
another datasource, and will look for a magic aboutEachAttr meta-property 
(which the parser will need to create) whenever a property lookup is performed.

Building this support directly into the parser will not work: although it would 
correctly parse RDF/XML, it would not properly deal with post-parse updates; 
e.g., via JS. Furthermore, any other datasource that is aggregated with the 
datasource containing the "aboutEach" would not correctly reflect the semantics 
of the containing element.

Comment 1

[Jason Eager]

Should this one be marked "helpwanted"?

How hard would this be to impliment?

Comment 2

[Jim Cudney]

Also, aboutEachPrefix doesn't work

<RDF:Description about="http://www.mozilla.org">
  <nc:Name>Mozilla</nc:Name>
</RDF:Description>
<RDF:Description about="http://www.microsoft.com">
  <nc:Name>Microsoft</nc:Name>
</RDF:Description>

<RDF:Description aboutEachPrefix="http:">
  <nc:IconClass>www-icon-image</nc:IconClass>
</RDF:Description>

Easy way to assign a common icon to every resource beginning with
"http:"  

but, it doesn't work yet in mozilla.

Comment 3

[Chase Tingley]

Recent decisions by the RDF WG have relevance here (from
http://www.w3.org/2000/03/rdf-tracking/)

- "aboutEach is not allowed on an rdf:Description(or typed node) element which
is the object of a statement."

http://www.w3.org/2000/03/rdf-tracking/#rdfms-aboutEach-on-object:
 
- aboutEachPrefix has been removed from M&S, because no one ever implemented it
(basically).

http://www.w3.org/2000/03/rdf-tracking/#rdfms-abouteachprefix

Comment 4

[Chase Tingley]

I am thrilled at being able to WONTFIX this.

http://www.w3.org/TR/2001/WD-rdf-syntax-grammar-20011218/#rdfms-abouteach

Comment 5

[Tom Everingham]

verified -   per W3C working draft aboutEach Removed from the grammar.