Complementarity Use Cases
"viewOf" as the fundemental underpinning relation (GK)
For me, the relationship I call "viewOf, where "A viewOf B" means that A is a constrained view or version of B (e.g. "Luc in Boston" is a constrained view of "Luc"), is the fundamental underpinning on which other kinds of complementarity may be built.
As a notion, "viewOf" is quite easy to understand (if not describe), and is the basic idea which explains relationships between Resources/Entities which allows us to make provenance statements with enduring truth, hence tractability for analysis.