Three Sublanguages

OWL Lite supports those users primarily needing a classification hierarchy and simple constraints.
OWL DL supports those users who want the maximum expressiveness while retaining computational completeness (we use Jess).
- Named for Description Logics.
- Supports all constructs, but sometimes only under certain conditions.
OWL Full is meant for users who want maximum expressiveness and the syntactic freedom of RDF with no computational guarantees.
- It is unlikely that any reasoning software will be able to support complete reasoning for every feature of OWL Full.