On Wed, 4 Jul 2007 19:15:32 +0100, "Emanuele D'Arrigo" <[EMAIL PROTECTED]> wrote:
> can a relation "is a" be used to completely replace categories? > Can you think of any advantage/disadvantage with this approach? No! "is a" represents specialization (e.g. Cat is-a Mammal, which means that all the instances of Cat are instances of Mammal) Categories are organized along the "is a" hierarchy, but also follow the "narrower than / broader than" relation (e.g. Algebra is a subcategory of mathematics), which is more like a kind of part-of both approaches are useful, and are complementary but not independent. I still haven't found a way to keep then in sync. olivier ------------------------------------------------------------------------- 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
