This paper draws together the various strands of work on the Hypernode
Model. In Section 2.1 we present the hypernode data structure, hypernode
databases, and schemas for these.  In Section 2.2 we present and illustrate
two query languages for the model, the procedural language HNQL and the
rule-based language Hyperlog.  In Section 3 we describe the implementation
of our prototype database system, addressing its physical, conceptual and
external levels in turn.  Finally, in Section 4 we discuss our contribution
and list several directions in which research is proceeding.