On 14/03/2008, S Page <[EMAIL PROTECTED]> wrote:
> Peter Ansell wrote:
>
>  > 1. Why does the semantic mediawiki ontology not use dublin core to
>  > subclass its essential properties?
>
>
> I'm not sure what you mean.  SMW doesn't impose a particular ontology on
>  annotations (except for its representation of MediaWiki categories).
>  However, you can "import" dc terms and tie SMW properties to them so
>  that when exported as RDF they use the dc ontology.  E.g. an article
>  about a research paper that says [[Has author:John Doe]] can export RDF
>    <dc:creator ...>John Doe</dc:creator>
>  instead of
>    <property:creator ...>John Doe</property:Last_page>

I wouldn't say that dc elements is imposing a particular ontology onto
anyone, it has no side effects, only extra possibilities that are
useful for querying. Just wondering why one would not want to use it,
instead making up a basic vocabulary based on Subjects and Wikipages
when both have been described by skos and dublin core elements/terms
respectively.

Wikipage isn't really an annotation anyway, its a basic part of the
document metadata. I would say the subject has a wikipage, which can
have dublin core metadata from the system. I am not referring to
something that you could create an annotation about easily. Just
wondering whether there were any efforts to exploit the fact that
semantic mediawiki is a wiki, and has the basic document
revision/provenance/contributor/creator metadata elements that can be
best described by the system.

>  > 2. What is being done to make revision histories integrate with the
>  > wikipage metadata? Use of FOAF in this area maybe?
>
>
> SMW annotations are not about the wiki article, they're about the thing
>  described by the article.  See
>    http://semantic-mediawiki.org/swivt/1.0#Subject
>
>  There's already MediaWiki code to export article information, see
>    http://meta.wikimedia.org/wiki/RDF_metadata
>    http://www.mediawiki.org/wiki/Extension:RDF
>  However, this code seems disabled in most installations, e.g.
>    http://ontoworld.org/wiki.phtml?title=Berlin&action=dublincore
>
>  I'm no expert on this stuff, please clarify.

It would be interesting to utilise MwRdfDcmes from Rdf.php as a part
of the actual annotation that semantic mediawiki outputs, with the
option to turn it off with __NODCMES__ or something similar if the
page author did not want the information publicised.

It could also be possible if one wanted to dissociate the subject of
the page from the metadata about the page to have these in two
different forms, but it would still be wise to link to them from both
places, ie, say where the document metadata can be found in the
semantic subject stuff and say where the subject of the page can be
found on the document metadata.

Just some thoughts. Might get in and hack something up when I get a chance.

Peter

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