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This is a synonym for Polyhierarchy


A Polyhierarchy is a hierarchy in which each node has one or more parents.

This type of hierarchy can be represented as a graph in which each node has a one or more directed links to or from other nodes. Since a node in a hierarchy cannot be a descendant of itself the resulting graph must not contain cyclic Relationships. This type of graphs is referred to as a " Directed Acyclic Graph ".


  • Polyhierarchical classification