Accession Number : ADA306402

Title :   Semantic Interoperation Via Intelligent Mediation.

Descriptive Note : Final technical rept. Aug 92-Feb 95,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Qian, Xiaolei ; Gong, Li ; Riemenschneider, Robert A.

PDF Url : ADA306402

Report Date : DEC 1995

Pagination or Media Count : 128

Abstract : This effort presents a query mediation approach to the trusted interoperation of autonomous databases containing data that mismatch in semantics, representations, and security policies. The main contributions are a unified policy framework of mandatory access control policies, and the automated mediation of queries between databases that resolves semantic, representational,and security policy heterogeneity. Query mediation in heterogeneous legacy databases makes both the data and the applications accessing the data interoperable. Automated query mediation relieves users from the difficult task of resolving mismatches. Decoupling semantic, representational, and security policy heterogeneity improves the efficiency of automated query mediation. Trusted query mediation makes data in isolated military and civilian databases sharable, and increases data owners' confidence and willingness in the sharing. The approach provides a seamless migration path for legacy databases, enabling organizations to leverage off investments in legacy data and legacy applications.

Descriptors :   *DISTRIBUTED DATA PROCESSING, *DATA PROCESSING SECURITY, DATA BASES, CONTROL, POLICIES, DATA MANAGEMENT, INTEROPERABILITY, SEMANTICS, ACCESS, MIGRATION.

Subject Categories : Information Science

Distribution Statement : APPROVED FOR PUBLIC RELEASE