Actually, since we're talking about querying different sources - I wonder if
adding such external sources for data through virtual namespaces would be a
way to extand data source? I had an idea to coupling SMW-based wiki with
some external source of information - this might be a solution.
Sergey
On Nov 29, 2007 5:10 PM, S Page <[EMAIL PROTECTED]> wrote:
> Denny Vrandečić wrote:
> > Any idea how to add page and wiki-meta data to SMW? The problem is, by
> > simply adding further special properties (last modified date, creation
> > date, etc.) it seems to clutter the property namespace... Well, doing
> > the implementation is not trivial either, but heck :)
>
> Perhaps a special virtual namespace, e.g. [[ArticleMetaProperty:Last
> modified date]] ?
>
> The SMW query code would notice this virtual namespace and retrieve the
> metadata. For extensibility, it could call back into custom code that
> gets a particular metadatum property; though appending extra SQL code
> seems very fragile. And doing this really ties SMW into MediaWiki
> database internals.
>
> Some of the names you want to query on are in
> http://meta.wikimedia.org/wiki/Help:Variable, like
> {{REVISIONTIMESTAMP}}. But this missing things like "username who last
> modified", "page size", etc.
>
> Hard to do, hard to maintain, hard to extend, but it would be very useful.
>
> --
> =S
>
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Sergey Chernyshev
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