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Reverse engineering of relational databases: Extraction of an EER model from a relational database

... These have been demonstrated to be implementable in a knowledge-based system; a working prototype system which does so is briefly discussed. In addition, cases in which human input is required are also clearly identified. This research ...

Publication - cat - 04/17/2013 - 13:27 - 0 comments - 1 attachment

Schema evolution and integration

... support scheme is distinguished from previous mechanisms in that it is primarily concerned with preserving existing database objects and ...

Publication - cat - 04/17/2013 - 12:38 - 0 comments - 1 attachment

Database Schema Evolution through the Specification and Maintenance of Changes on Entities and Relationships

... database system needs to support changes to its schema in order to facilitate the requirements of new applications and to support interoperability within a multidatabase system. In this paper, we present an approach to schema evolution through changes to ...

Publication - erhard - 04/17/2013 - 05:16 - 0 comments - 0 attachments

Implementing Lazy Database Updates for an Object Database System

... conversion functions: immediate or lazy database updates. In this paper, we concentrate our attention to the definition of implementation ...

Publication - cat - 04/16/2013 - 19:38 - 0 comments - 1 attachment

Unique Complements and Decompositions of Database Schemata

... 345.44 KB In earlier work, Bancilhon and Spyratos introduced the concept of a complement ... database schema, and showed how this notion could be used in theories of decomposition and update semantics. However, they also showed that, except in trivial cases, even minimal complements are never unique, so that many ...

Publication - cat - 04/16/2013 - 18:38 - 0 comments - 1 attachment

Semantic Integration in Heterogeneous Databases Using Neural Networks

... 1.37 MB One important step in integrating heteroge- neous databases is matching equivalent at- tributes: Determining which fields in two databases refer to the same data. The mean- ing of information may be ... a neural network to recog- nize similar attributes. In our technique, the knowledge of how to match equivalent data elements ...

Publication - admin - 04/16/2013 - 15:38 - 0 comments - 1 attachment

Supporting Exceptions to Behavioral Schema Consistency to Ease Schema Evolution in OODBMS

... evolve, some schema updates may violate these rules. In order to maintain complete behavioral schema consistency, traditional ... of existing methods. Such operations are very expensive in a database context. To ease schema evolution, we propose to support ...

Publication - erhard - 04/16/2013 - 10:27 - 0 comments - 1 attachment