Patent ID: 7305382

Claim:
An information searching apparatus comprising: an index information registering device that registers a word extracted from a document in association with the document as index information for document search; a document searching device that searches a document corresponding to information relating to a requested search by referring to the index information registered by said index information registering device; an unknown word extracting device that extracts an unknown word which is not in a dictionary from the document being searched; a document type determining device that determines whether a type of the document being searched is a character recognition processed document that has been processed through a character recognition device; a permitting/inhibiting designating device that designate whether said index information registering device is permitted or inhibited to register as the index information the unknown word extracted by said unknown word extracting device from the document being searched when the document being searched is the character recognition processed document; and a registration permitting/inhibiting deciding device that decides, when the type of the document being searched is the character recognition processed document, to inhibit said index information registering device from registering as the index information the unknown word extracted from the document being searched by said unknown word extracting device if said permitting/inhibiting designating device designates to inhibit said index information registering device from registering.