Izvorni znanstveni članak

DATA SOURCE WRAPPERS BASED ON DEFINITE CLAUSE GRAMMARS

Alen Lovrenčić ; Faculty of Organization and Informatics, University of Zagreb, Varaždin, Croatia

Sažetak

The problem of the integration of heterogeneous data sources can be divided into two separated subproblems. The first one is the problem of solving semantic inconsistencies and conflicts between independent sources. This problem is dealt with in [4].[5].[6] and [12]. In this paper we shall deal with the second subproblem - the problem of translation among different query languages that data sources may use. Grammar templates will be created for some of them, using DC grammars. We will show that DC grammars are good enough to represent all the properties of query languages that are syntactically of the first or a higher order.

Ključne riječi

heterogeneous sources; integration; wrapper; query processing; grammars

Hrčak ID:

78715

URI

https://hrcak.srce.hr/78715

Datum izdavanja:

14.12.2000.

Posjeta: 1.023 *