The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 1995
Filed:
Aug. 31, 1992
William B Rubin, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An implementation of one-to-many binary relations in an object-oriented database management system and object-oriented data model. The implementation includes storing all the information for the relationships of a relation contiguously inside the related instances, such as a source instance and a sink instance. The information stored within the related instances is used to create a doubly-linked ring of instances. The doubly-linked ring of instances is used in implementing a relation. In order to iterate through a relation, a cursor is employed. Encapsulated within the cursor are various pointers and data members which are used in cursing through the relation. The cursor is type safe and each cursor instance is maintained in a cursor dictionary, providing iteration safety. In addition, the cursor is operational in a forward direction and a backward direction, and the direction of the cursor can be dynamically switched.