A pre-relational databases datamodel. "Preceeded" by the relational model since the flexibility of this makes it hard to work with. Now re-invented in RDF :)
Y. Simmhan, B. Plale, и D. Gannon. Concurrency and Computation: Practice & Experience, Special Issue on The First Provenance Challenge, 20 (5):
441--451(апреля 2008)IF 0.636, CORE A.