Method and apparatus for searching database component files to retrieve information from modified files
US5129082A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1990 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Mar 27, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99952
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Each database component file contains information regarding the text contained in the source file which enables the user to quickly determine the frequency of occurrence of the specified text and the location of the specified text in the source file. For each textual word (referred to herein as a "symbol") an entry in the database file is provided containing symbol information. The symbol information comprises the symbol name, symbol type and line number in the source file where the symbol is located. Line indentification information is also provided which contains the line numbers in the source file and corresponding line lengths and hash values which are computed from the contents of the lines of the text in the source file. Before a line of text identified in a query is displayed to the user indicating a result of the query, the line identification information provides the means to verify that the line of text identified in the symbol information is the same line of text contained in the source file. The hash value and line length corresponding to the line text is compared to a line length and hash value computed for the text retrieved from the source file. If the computed line …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.