fwiw, we built a persistent graph model using the CORBA Relationship
Service into the Tideway product to track just this type of
dependency. I think that it was quite easy to build the layer and the
service definitions are nicely robust and very flexible. I'm not
familiar with those products, but the big challenge was in developing
a useful query/manipulation language. I don't know how important this
is, but stuff like checking for DAG compliance and dominance searches
were tough.

The db got quite large as it tracked objects, object types, taxonomies
and relationships across very large commercial infrastructures (~1M
entities).

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