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 :)
M. abbas Choudhary M. Asif Naeem. IEEE International Conference on Advanced Computer vision and Information Technology, page 397-405. http://www.itvidya.com/acvit_2007_aurangabad, Department of Computer Science and IT, Dr. B.A.M. U Aurangabad. (MS) India, I. K. International, (December 2007)
F. Abel, N. Henze, and D. Krause. Web Information Systems and Technologies, 4th International
Conference, WEBIST 2008, Funchal, Madeira, Portugal, May
4-7, 2008, Revised Selected Papers, volume 18 of Lecture Notes in Business Information Processing, page 199-213. Springer, (2008)
M. Abel, L. Silva, L. De Ros, L. Mastella, J. Campbell, and T. Novello. Expert Systems with Applications, 26 (1 SPECISS):
9-18(2004)TY - JOUR U1 - 03477735478 Compilation and indexing terms, Copyright 2004 Elsevier Engineering Information, Inc. U2 - Intelligent databases.
M. Abel, L. Silva, L. De Ros, L. Mastella, J. Campbell, and T. Novello. Expert Systems with Applications, 26 (1 SPECISS):
9-18(2004)TY - JOUR U1 - 03477735478 Compilation and indexing terms, Copyright 2004 Elsevier Engineering Information, Inc. U2 - Intelligent databases.