Method of imposing multi-object constraints on data files in a data processing system
US5408657A · kind A · utility
41Cited by
2References
11Claims
0Family size
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Key dates
| Filing date | May 17, 1994 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | May 17, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99952
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, in a data processing system, of imposing constraints on data files which are changed by update statements, includes the steps of: a) identifying a particular object of the update O.sub.x and a particular attribute being updated; b) finding an applicable constraint based on the particular attribute being updated; c) converting the particular update object O.sub.x to at least one other object which is in the applicable constraint and is different than the update object O.sub.x ; and, d) generating an error message, if after the update, the applicable constraint is not satisfied by any object from the converting step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.