ERROL: An Entity-Relationship, Role Oriented, Query Language.
Conference: Proceedings of the 3rd Int. Conf. on Entity-Relationship Approach (ER'83)
Article: QBD *: A Fully Visual Query System1[Show abstract] [Hide abstract]
ABSTRACT: The need of a friendly man-machine interaction is becomingcrucial for a large variety of applications, in particular, thoserequiring frequent extraction of information from the database.Experience suggests that traditional query languages are notfriendly enough for the casual user: she/he is requested toformulate queries in a textual language, without any iconic orspatial clues to help the querying process. A new generation oflanguages (visual languages) has been recently investigated,...Journal of Visual Languages and Computing - VLC.
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ABSTRACT: we propose a DBMS the data model of which is an extension of the Entity-Relationship model of Chen. The main extensions include the specialization and generalization concepts of Smith 6 Smith and the possibility to define relationships between relationships. In addition we extend the concept of a role in a relationship, to a multi-valued role which enables to associate a set of tuples performing the same function in a relationship. AVLDB'86 Twelfth International Conference on Very Large Data Bases, August 25-28, 1986, Kyoto, Japan, Proceedings.; 01/1986
- Journal of Visual Languages & Computing 01/1997; 8(2):215-260. · 0.56 Impact Factor
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