OEH is a unified index that supports subsumption order-testing and index-resident monoid roll-up on poset hierarchies via nested-set embeddings for trees or chain decomposition for low-width DAGs.
Efficient implementation of lattice operations.ACM TOPLAS, 11(1), 1989
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One Index for Subsumption and Roll-up across Time, Geography, and Ontology
OEH is a unified index that supports subsumption order-testing and index-resident monoid roll-up on poset hierarchies via nested-set embeddings for trees or chain decomposition for low-width DAGs.