Accession Number:

ADA093878

Title:

Constructing Superviews.

Descriptive Note:

Technical rept. Apr 80-Mar 81,

Corporate Author:

WHARTON SCHOOL PHILADELPHIA PA DEPT OF DECISION SCIENCES

Personal Author(s):

• Motro,Amihai
• Buneman,Peter

Report Date:

1980-11-01

Pagination or Media Count:

31.0

Abstract:

A method is described for integrating two or more databases into a conceptual superview, through a set of schema transformations. Such integration may be useful when it is required to produce a unified view of two databases while preserving their physical independence. Each transformation defines a mapping of queries against the superview into the appropriate set of queries against the underlying data bases and imposes a constraint that is checked when the query is evaluated. A program that interactively aids the user in constructing the superview and that performs this query transformation is being developed. Author

Descriptors:

• *DATA BASES
• *INTEGRATED SYSTEMS
• *DATA MANAGEMENT
• MATHEMATICAL MODELS
• COMPUTER COMMUNICATIONS
• COMPUTER ARCHITECTURE
• NODES
• INFORMATION RETRIEVAL
• MULTIPROCESSORS
• INTERROGATION
• TRANSFORMATIONS
• NETWORK FLOWS

Subject Categories:

• Computer Hardware
• Computer Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE