|
Name |
Characteristic |
|---|---|
|
AL |
Basic description language |
|
ALU |
AL + unions |
|
ALE |
AL + existential quantification |
|
ALN |
AL + number restrictions |
|
ALFL- |
AL + non-atomic negation |
|
ALC |
AL + union (U ) + existential quantification (E ) + complement (C) |
|
S |
ALC + transitively closed primitive roles |
|
SH |
S + hierarchy of roles |
|
SHI |
SH + inverse roles |
|
SHIQ |
SHI + generalized cardinality restrictions |
|
SHIN |
SHIQ limited to unqualified number restrictions |
|
SHO |
SH + singleton classes |
|
SHOQ |
SHO + qualified number restrictions |
|
SHIF |
SHIN limited to functional number restrictions |
|
SHOIN |
SH + singleton classes (O) + inverse roles (I) + unqualified number restrictions (N ) [basis for OWL] |