0.2.2 release: equivalence cliques

This new release allows for the nesting of equivalence cliques from either xrefs or equivalence axioms.

Starting with a defined set of predicates/properties (for example, the obo “xref” property, or an owl equivalentClasses declaration between two classes), it will transitively expand these until a maximal clique is found for each node. All such mutually connected nodes with then be visualized inside one of these cliques.

An example is shown below (Uberon (yellow) aligned with ZFA (black) and two Allen Brain Atlas ontologies (grey and pink); each ontology has its own color; any set of species-equivalent nodes are clustered together with a box drawn around them. isa=black, part_of=blue). Classes that are unique to a single ontology are shown without a bounding box.