Relation _COMPLEX

Common sense wholes having a (multiple) heterogeneous compositional structure: systems, composites, compounds, etc. (Gerstl-Pribbenow96).
Arity: 2
Subrelation-Of: _weak-whole
Axioms:
(<=> (_Complex ?A ?B)
     (And (Not (_Homogeneous ?A ?B)) (_Weak-Whole ?A ?B)))