On Donnerstag, 27. August 2009, Laurent Alquier wrote: > Very intriguing. > > Are you planning to have support for some kind of display name, > through a property defined on the Property page maybe ? > > It would be nice to have a way to hide the reverse notation with a > meaningful string sometimes.
Yes, we have considered this, and it might be something that we can still add at some point. This could certainly be built on top of the current extension (in essence, it is just another way of addressing the inverses). However, there are a number of open design issues that we have not solved yet: (1) What happens if the inverse label is also the name of a (non-inverse) property? (2) What happens if two properties have the same inverse label? (3) What happens if one property has multiple inverse labels? I think (3) is easy enough: there is no reason not to have multiple labels there. But the other two are tricky. Regards, Markus > > - Laurent Alquier > Http://www.Alquier.org > > > On Aug 26, 2009, at 5:36 PM, Markus Krötzsch <mar...@semantic-mediawiki.or > > g> wrote: > > On Mittwoch, 26. August 2009, Jon Lang wrote: > >> Markus Krötzsch wrote: > >>> If applicable, inverse properties generally are linked to the page > >>> of the > >>> corresponding property (so "-developer of" links to > >>> "Property:developer > >>> of"). It is strongly suggested not to create property pages that are > >>> called like inverse properties (it won't destroy anything, but it > >>> might > >>> create unnecessary confusion). > >> > >> Could you give an example of this, please? In particular, what are > >> you meaning by "are linked to"? > > > > Sorry, I was not very clear here: Sometimes property names are > > displayed > > somewhere, for example in the header of tables created by #ask. Such > > texts are > > often linked to the property's page. In case of inverses, links will > > go to > > non-inverse property pages. > > > >>> Also, you cannot use inverse properties to enter semantic data > >>> into the wiki: all annotations must be on the page that is the > >>> subject of > >>> the non-inverted property. > >> > >> So inverse properties are like the "what pages link here?" Wiki > >> feature? > > > > Very roughly, yes. > > > >>> Inverses in queries are currently only supported if they are of > >>> Type:Page. > >> > >> That makes sense. > >> > >>> == Development Information == > >>> > >>> The main changes that I expect to be required in SMW extensions is > >>> in > >>> places where you deal with property subjects and silently expect > >>> them to > >>> be of Type:Page. If users can enter inverse properties, then a > >>> query for > >>> a subject can also return datavalues of other datatypes, so you > >>> need to > >>> use the generic datavalue API, or check the type of the datavalue > >>> first. > >> > >> Could you give an example of such a query, for illustrative purposes? > > > > What query do you mean? You mean the actual source code that uses > > inverse > > properties? It is not different from code using non-inverse > > properties, > > really. > > > >>> I hope that SMW already works properly in all cases where inverses > >>> can > >>> occur. Feedback is welcome. > >> > >> This is a welcome step forward. The other feature that I'm hoping to > >> see relatively soon are transitory properties. > > > > This is much harder (I think you mean "transitive" here). > > Maybe not so soon ... > > > > -- Markus > > > > > > > > -- > > Markus Krötzsch <mar...@semantic-mediawiki.org> > > * Personal page: http://korrekt.org > > * Semantic MediaWiki: http://semantic-mediawiki.org > > * Semantic Web textbook: http://semantic-web-book.org > > -- > > > > --- > > --- > > --- > > --------------------------------------------------------------------- > > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 > > 30-Day > > trial. Simplify your report design, integration and deployment - and > > focus on > > what you do best, core application coding. Discover what's new with > > Crystal Reports now. http://p.sf.net/sfu/bobj-july > > _______________________________________________ > > Semediawiki-devel mailing list > > Semediawiki-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/semediawiki-devel -- Markus Krötzsch <mar...@semantic-mediawiki.org> * Personal page: http://korrekt.org * Semantic MediaWiki: http://semantic-mediawiki.org * Semantic Web textbook: http://semantic-web-book.org --
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