Patent ID: 7143086
Filing Date: 2006-11-28
Classification: G06F,Y10S

Abstract:
1. A file search method for searching a file to be searched, said file to be searched including records having fields allocated to each of a plurality of hierarchical levels and being constructed so that records having a same key character string in a field at a same hierarchical level are arranged in series, comprising: creating an index file containing management information for each of nodes in a tree structure obtained by classifying the records in said file to be searched by using a plurality of hierarchical levels, the management information including a title of a key character string contained in each node, a pointer indicating a record position of node management information of a lower hierarchical level, and start position information and number information about records having a field with the key character string on said file to be searched; accepting an instruction to search for data relating to a specified key character string over said file to be searched; retrieving from said index file the start position information and the number information about records relating to the specified key character string on said file to be searched; extracting from said file to be searched a number of records specified by the number information from a position specified by the start position information; and outputting data of the extracted records.