On Jul 4, 2007, at 23:24 , Yaron Koren wrote: > The big reason to use categories instead of relations for "is a" > relationships is that categories support inheritance, while relations > don't. To use Olivier's example, if you classify a cat as being of > category "Mammal", and "Mammal" being of category "Animal", then you > can do a query on [[Category:Animal]] and cats will show up, assuming > they fit the other query criteria. You can't replicate that behavior > with relations.
You _could_, with a more powerful reasoner that also supports transitive closures of arbitrary relations. Nevertheless, in SMW the overall software support (also browsing) for categories is far better than for relations, as categories are an important feature of MediaWiki and its main application Wikipedia. But things change – I really like the “browse” feature of SMW 0.7… Best, Christoph -- Christoph Lange, Jacobs Univ. Bremen, http://kwarc.info/clange/, ICQ# 51191833 ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Semediawiki-user mailing list Semediawiki-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/semediawiki-user
