coms1024@waikato.ac.nz (07/05/90)
hello I am interesting in getting some information( articles, books....) on 1) the implementation of semantic data model(s) on a relational back-end. and/or 2) the implementation of object-oriented data model(s) on a relational back-end. please mail replies to coms1024@waikato.ac.nz if there is enough interest, i shall summerize to the net. thank you patricia
attila@breeze.bellcore.com (07/05/90)
> hello > > I am interesting in getting some information( articles, books....) > on > 1) the implementation of semantic data model(s) on a relational > back-end. > and/or 2) the implementation of object-oriented data model(s) on a relational > back-end. > > please mail replies to coms1024@waikato.ac.nz > > if there is enough interest, i shall summerize to the net. > > thank you > patricia Two of the better known ones are Carlo Zanilio's GEM implemented on a Britton-Lee relational database machine and Lynnabeck & Vinnau's attempt at implementing Iris on an exiting H-P relational back end. For GEM see ACM-SIGMOD Proceedings, San Jose, 1983. [I cannot recall the Iris reference but you can run a library search on either Iris or the authors.] Leslie A. Walko Bell Communications Research Database & Systems Research Group p.s. How about some semantic implementations on a non-relational system? SIM is an extremely well done implementation of Hammer & McLeod's SDM on Unisys DMSII. [Granted, they re-wrote most of DMSII in the process] It is available commercially, so call your sales rep. See "SIM: Implementation of a Database Management System Based on a Semantic Data Model" by R. L. Guck, B. L. Fritchman, J. P. Thompson, D. M. Tolbert, in IEEE Data Eng. Bulletin, 1988. You might also be interested in a *real* oodb,ms done from scratch, but using many relational concepts in the query optimizer. Statice was done by Weinreb, Lamb and Gerson. It is a very nice (and fast) oodbms strongly based on DAPLEX. It is available from Symbolics, 617/221-1000, Burlington, MA.