Table 3

Some properties of the relations in the OBO Relation Ontology

Relation
Transitive
Symmetric
Reflexive
Antisymmetric

is_a
+
-
+
+
part_of
+
-
+
+
located_in
+
-
+
-
contained_in
-
-
-
-
adjacent_to
-
-
-
-
transformation_of
+
-
-
-
derives_ from
+
-
-
-
preceded_by
+
-
-
-
has_participant
-
-
-
-
has_agent
-
-
-
-

Smith et al. Genome Biology 2005 6:R46   doi:10.1186/gb-2005-6-5-r46