Please use this identifier to cite or link to this item: http://hdl.handle.net/1880/46287
Title: APPLICATION OF SQL/N AND ASSOCIATION MODES TO DATA BASES CONTAINING RECURSIVE ASSOCIATIONS
Authors: Bradley, J.
Keywords: Computer Science
Issue Date: 1-Sep-1986
Abstract: Modes of association are defined for the recursive associations that occur in bill of materials data bases and data bases for the family trees of corporations. It is shown that a series of useful modes may be explicitly defined. Modes of association may be schema defined to enable a relational data base system to capture more meaning about an association. When used with natural quantifiers and SQL/N, an upward-compatible extension of SQL, these modes permit construction of concise expressions for complex retrievals involving explosions and implosions of entities described in the data base. Full explosions/implosions may be expressed in SQL/N, which is not possible with SQL. A mode of association is a set of propositions, but may be defined and implemented as a relationship relation.
URI: http://hdl.handle.net/1880/46287
Appears in Collections:Bradley, James

Files in This Item:
File Description SizeFormat 
1986-243-17.pdf1.55 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.