Abstract: An aspect includes phrase searching using exclusion tokens. A token division unit is configured to divide an input character string to be searched into a plurality of tokens. A token position definition unit is configured to set each token to be excluded in an occurrence position calculation as an exclusion token and to set each token to be included in the occurrence position calculation as a headword token, and define an occurrence position for each headword token. A position offset information assigning unit is configured to assign, to each of the exclusion tokens, position information obtained with the headword token followed by the exclusion tokens and to assign the headword token followed by the exclusion tokens as a starting point. An indexing processing unit is configured to perform indexing on the plurality tokens such that whether or not the exclusion tokens follow one of the plurality of tokens is identifiable.

Abstract: Retrieval is completed in a short time for presenting a retrieval result of a document file, which satisfies a retrieval condition, to a user having the authority to perform predetermined processing.

Abstract: An aspect includes phrase searching using exclusion tokens. A token division unit is configured to divide an input character string to be searched into a plurality of tokens. A token position definition unit is configured to set each token to be excluded in an occurrence position calculation as an exclusion token and to set each token to be included in the occurrence position calculation as a headword token, and define an occurrence position for each headword token. A position offset information assigning unit is configured to assign, to each of the exclusion tokens, position information obtained with the headword token followed by the exclusion tokens and to assign the headword token followed by the exclusion tokens as a starting point. An indexing processing unit is configured to perform indexing on the plurality tokens such that whether or not the exclusion tokens follow one of the plurality of tokens is identifiable.

Abstract: Methods, apparatus and systems, including computer program products for creating an index for search in a search system by collecting and analyzing documents to be searched. A first storage section stores system configuration information of the search system. A second storage section stores attribute information of a collected document and the system configuration information at the time of document collection for each document. A comparison section compares the attribute information of the documents to be collected and the system configuration information stored in the first storage section with the attribute information and the system configuration information stored in the second storage section, respectively, if forced re-collection of the documents is performed. A document collection section collects the documents according to a predetermined schedule under normal conditions and re-collects only documents for which a mismatch is detected by the comparison section in the case of forced re-collection.

Abstract: To provide a retrieval device, a retrieval system, a retrieval method, and a computer program capable of completing retrieval in a short time for presenting a retrieval result of a document file, which satisfies a retrieval condition, to a user having the authority to perform predetermined processing.

Abstract: Methods, apparatus and systems, including computer program products for creating an index for search in a search system by collecting and analyzing documents to be searched. A first storage section stores system configuration information of the search system. A second storage section stores attribute information of a collected document and the system configuration information at the time of document collection for each document. A comparison section compares the attribute information of the documents to be collected and the system configuration information stored in the first storage section with the attribute information and the system configuration information stored in the second storage section, respectively, if forced re-collection of the documents is performed. A document collection section collects the documents according to a predetermined schedule under normal conditions and re-collects only documents for which a mismatch is detected by the comparison section in the case of forced re-collection.