ion:
        a.  Assumption (a).  Commonality in the object domain.
        b.  Assumption (b).  Commonality in the interpretant domain.
        c.  Conclusion (c).  Canonically privileged frame of reference.
B.  Bearing of the sign relational POV on several design issues:
    1.  Ontological Integrity versus Ontological Modularity.
    2.  Ontological Invariance versus Ontological Relativity.
    3.  Interoperability among ontological frames of reference.
    4.  Differential topics.
        a.  Change.
  