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But isn't IMB a hierarchical database (http://en.wikipedia.org/wiki/Hierarchical_database_model http://en.wikipedia.org/wiki/Hierarchical_database_model), which
by espeed 15y ago
But isn't IMB a hierarchical database (http://en.wikipedia.org/wiki/Hierarchical_database_model http://en.wikipedia.org/wiki/Hierarchical_database_model), which is a tree-like structure?
This is somewhat different than a general graph database (http://en.wikipedia.org/wiki/Graph_database http://en.wikipedia.org/wiki/Graph_database) where nodes are not restricted to being a hierarchy.