Full Idea
The 'categorical' properties are roughly those that concern what goes on in the actual world; the properties excluded from that family are the 'hypothetical' ones, which concern what goes on in other worlds.
Gist of Idea
'Categorical' properties exist in the actual world, and 'hypothetical' properties in other worlds
Source
Kathrin Koslicki (The Structure of Objects [2008], 3.2.3.1)
Book Reference
Koslicki,Kathrin: 'The Structure of Objects' [OUP 2008], p.55
A Reaction
The awkward guest at this little party is the 'dispositional' properties, which are held to exist in the actual world, but have implications for other worlds. I'm a fan of them.