[Semediawiki-user] status & differences of Is_a and Category

[S P. <ski...@ea...>]

http://wiki.ontoworld.org/index.php/Relation:Is_a says
"Note that instead of using this relation, the final version will
probably just incorporate the Category links MediaWiki already supports."

For what it's worth, I prefer reusing Category over Is_a.

Currently all the Is_a relations link one encyclopedia page to another.
  If you're going to replace them with categories, I think Is_a should 
only link to pages in the Category: namespace like "Category:City".  But 
if you look at the way people are using Is_a relations in the ontoworlk 
wiki, it's far broader than the way the English Wikipedia currently uses 
categories.

Also, it's interesting that English Wikipedia categories are usually
plural, e.g. http://en.wikipedia.org/wiki/Category:Cities ,
where all the Is_a "class" pages are singular, like "City".

Categorically yours,
--
=S