Denny,

It's good to hear that this part of Semantic Web idea is not being forgotten.
I don't know i anything is broken, but I expected http://ontoworld.org/wiki/Special:ExportRDF/Denny_Vrandecic to contain a value of that property, but I couldn't fine one in there.

          Sergey


On Dec 28, 2007 5:32 PM, Denny VrandeŔiŠ < dvr@aifb.uni-karlsruhe.de> wrote:
Hi Sergey,

in the current SVN the equivalent URIs are switched on again. I am
testing it currently on my own website in order to mush up the different
URIs that are used throughout the SemWeb for me. Seems to work :)

I am not sure if I have broken something though, are the URIs checked at
any point? This is a good way to break the export, it seems.

Greetings,
denny



Sergey Chernyshev wrote:
> I'm actually thinking of using some of standard W3C vocabularies on
> TechPresentations.org and I'm thinking of using ontology import like I
> do with http://www.techpresentations.org/Property:Homepage
> <http://www.techpresentations.org/Property:Homepage> for, example.
>
> But I was also thinking of defining my Properties and mapping them to
> W3Cs with ("same as" relations) just to have more flexibility in the
> future, so "Equivalent URI" seemed to be best solution in this case.
>
> Since SMW instances only start to be part of overall Semantic Web, it'll
> be great if it was easy to provide data in the form that will make it
> easily participate in projects like LinkingOpenData (
> http://esw.w3.org/topic/SweoIG/TaskForces/CommunityProjects/LinkingOpenData)
> without any additional tools to dump or otherwise export data. I'd
> appreciate any thoughts on this.
>
>         Sergey
>
>
> On Dec 21, 2007 7:45 AM, S Page <info@skierpage.com
> <mailto:info@skierpage.com>> wrote:
>
>      >> It's certainly an under-documented feature.
>
>     I put some documentation for this at
>     http://ontoworld.org/wiki/Property:Equivalent_URI
>     < http://ontoworld.org/wiki/Property:Equivalent_URI>
>
>
>     semediawiki-user@antispam.sergeychernyshev.com
>     <mailto:semediawiki-user@antispam.sergeychernyshev.com>> wrote:
>
>      > Yaron, which RDF constructs do "Equivalent URI" and "Has URI"
>     create?
>
>     I believe the special property "Equivalent URI" does nothing in the
>     current SMW 1.0 codebase except automatically assign Type:URL to its
>     value.  The code to handle it is commented out in Special:ExportRDF,
>     and
>      the only other user of it is Special:OntologyImport which is not
>     loaded by default and may not work.
>
>     It might still be useful to have a reserved property name for this
>     concept, but it seems this special property doesn't get exported at
>     all,
>     e.g. http://ontoworld.org/wiki/Special:ExportRDF/Denny_Vrandecic doesn't
>     export the annotation
>       [[equivalent URI:= http://vrandecic.de/nny]
>     < http://vrandecic.de/nny%5D>]
>     at all.
>
>     The only uses I see of this on ontoworld.org < http://ontoworld.org>
>     are a few user pages saying
>     there's an equivalent URI for them, the user's home page.  This
>     usage is
>     slightly different than the usage Markus describes of associating a
>     *property* with a common meaning beyond the wiki.
>
>     (BTW, there is no property "Has URI".)
>
>     --
>     =S Page
>
>     Markus Kr÷tzsch wrote:
>
>      > There is a reason for that ... we introduced this feature so that
>     people could
>      > influence the RDF-export by adding alternative URIs about things
>     in the wiki.
>      > This could be used, e.g., to align the RDF-export of two wikis
>     that use some
>      > common terms and that do want to indicate in their export that
>     the properties
>      > are actually the same as in the other wiki. So these properties
>     are mostly
>      > used to tweak the RDF for further reuse -- if you do not
>     understand this
>      > motivation, then you do not need that feature ;-).
>      >
>      > However, more recent versions of SMW introduced the "vocabulary
>     import" which
>      > enables you to use a limited set of URIs directly in place of the
>     basic wiki
>      > URIs. This feature is documented, and it has some better tool
>     support since
>      > it just directly uses the new URI instead of just stating that it
>      > is "equivalent". We are still thinking about other features to
>     allow custom
>      > URIs in the future, e.g. for special properties that are part of
>     some SMW
>      > extension (they have always the same meaning, so they should use
>     the same URI
>      > on all sites). Anyway, these are all Semantic Web issues that are
>     relevant
>      > mostly for data exchange and reuse outside the wiki.
>
>
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Sergey Chernyshev
http://www.sergeychernyshev.com/