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Query Transformation Techniques for Interoperable Query (1994)
| Content Provider | CiteSeerX |
|---|---|
| Author | Raschid, Louiqa Chang, Yahui Dorr, Bonnie J. |
| Description | formation techniques, architecture for interoperable query processing, rep-resentations using F-logic. Abstract: This paper describes a technique to support interoperable query processing, when multiple heterogeneous servers are accessed in a coopera-tive information system (CoopIS). The problem is to support query trans-formation transparently, so a user can pose queries locally, without needing global knowledge about dierent data models and schema in the CoopIS. An architecture for supporting interoperability is described and we provide some details of transforming queries from an object schema to an equiv-alent relational schema. We describe some functional modules, in detail, namely an extractor module (EM) which extracts semantics from a source query, and a heterogeneous mapping module (HTM) which maps among en-tities in dierent schema, based on some mapping rules which re ect global knowledge of the models, schema and query languages. The local and global dictionary knowledge is represented in a canonical form, using a high-level logic representation, namely F-logic. 1 |
| File Format | |
| Language | English |
| Publisher Date | 1994-01-01 |
| Publisher Institution | Processing in Cooperative Information Systems”. Int. Conf. on Coop. Information Systems |
| Access Restriction | Open |
| Subject Keyword | Interoperable Query Canonical Form Transformation Technique High-level Logic Representation Dierent Schema Global Knowledge Coopera-tive Information System Interoperable Query Processing Multiple Heterogeneous Server Object Schema Heterogeneous Mapping Module Dierent Data Model Functional Module Equiv-alent Relational Schema Mapping Rule Ect Global Knowledge Global Dictionary Knowledge Formation Technique Extractor Module Query Language Source Query |
| Content Type | Text |
| Resource Type | Article |
