JP2005190398A - Information retrieval system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To retrieve document information on the basis of a designated retrieval keyword even in the case that a character string which is not included in document information to be retrieved is designated as the retrieval keyword. <P>SOLUTION: Included character strings which are included in document information registered in a document information database 70 and similar word character strings resembling the included character strings are managed in a keyword management part 20 by associating with each other, and a keyword setting part 30 sets an included character string as a retrieval keyword in the case that a designated retrieval keyword is managed as the included character string by the keyword management part 20, and the keyword setting part 30 sets an included character string managed by associating with a similar word character string, as a retrieval keyword in the case that a designated retrieval keyword is managed as the similar word character string by the keyword management part 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information search system for searching digitized document information such as a desired document file from a specified search keyword.

  In recent years, with the progress of the information society, various document information has been digitized and stored. As described above, when the document information is digitized and stored, identification information such as a file name is given to each digitized document information, and then the stored document information is used when desired. By specifying the identification information given to the document information, desired document information is extracted from the stored document information.

  In addition, by specifying a character string that is supposed to be included in the desired document information as a search keyword, the desired document information is also searched without specifying the identification information given to the document information.

Here, in document information search using such a search keyword, in order to efficiently search for desired document information, when a search keyword is specified, similar words of the search keyword are also set as the search keyword. A technique for searching for desired document information using these designated search keywords and similar words has been considered (see, for example, Patent Document 1). In this technique, when a search keyword for searching document information is specified, the similar word database is referred to, the similar word of the specified search keyword is searched, and the searched similar word is specified. At the same time, it is set as a search keyword, and the document information is searched.
Japanese Patent Laid-Open No. 7-141397

  However, in the above-described search for document information using the specified search keyword and its similar terms as the search keyword, the similar term database is referred to when the search keyword is specified, and the specified search keyword is specified. Similar words are searched, and the searched similar word and the specified search keyword are set as the search keywords for searching the document information, so the specified search keyword and the similarity of this search keyword There is a possibility that the word is not included in all the document information to be searched, and in this case, the desired document information is searched even though the search range is expanded using similar words. There is a problem that can not be.

  The present invention has been made in view of the problems of the conventional techniques as described above, and a character string that is not included in all document information to be searched is designated as a search keyword. Even if it is a case, it aims at providing the information search system which can search document information based on the designated search keyword.

In order to achieve the above object, the present invention provides:
An information search system for searching for document information corresponding to a specified search character string from a document information group consisting of a plurality of document information,
A character string management means for managing a contained character string included in the document information group and a similar word character string similar to the contained character string in association with each other;
When the specified search character string is a character string managed as a contained character string by the character string management means, the contained character string is set as a search character string, and the designated search character When the string is a character string managed as a similar word character string by the character string managing means, the contained character string managed in association with the similar word character string by the character string managing means is searched. Search string setting means to set in the string,
Document information search means for searching for document information based on the search character string set by the search character string setting means.

  Further, the search character string setting means is specified when there are a plurality of contained character strings set as the search character string and at least one contained character string is designated from the plurality of contained character strings. Only the contained character string is set as a search character string.

  Further, when the appearance rate in the document information of the search character string is specified, the document information search unit has the specified appearance rate as the search character string set by the search character string setting unit. The document information included is searched for.

  Further, a screen for designating the search character string, the appearance rate, and the number of document information searched by the document information search means is displayed, and the number of document information searched by the document information search means When the number exceeds the specified number, the display unit displays a screen for changing at least the appearance rate and the number of document information retrieved by the document information retrieval unit.

  In the present invention configured as described above, the character string management means corresponds to the contained character string included in the document information group including a plurality of document information and the similar word character string similar to the contained character string. If a search character string is specified to search for document information, the search character string setting unit manages the specified search character string as a contained character string. The contained character string is set as the search character string, and the specified search character string is a character string managed as a similar word character string by the character string management means The contained character string managed in association with the similar word character string by the character string managing means is set as the search character string, and then the search set by the search character string setting means in the document information searching means Based on string Document information Te is searched.

  As described above, when a search character string for searching for document information is designated, the contained character string included in the document information group to be searched is set as the search character string in accordance with the search character string. Since information is searched, even if a character string that is not included in all document information to be searched is specified as a search character string, it is based on the specified search character string. Document information.

  Further, in the search character string setting means, when there are a plurality of contained character strings set as the search character string and at least one contained character string is designated from the plurality of contained character strings, the designated contained character string If only the character string is set as the search character string, the document information to be searched can be narrowed down after a plurality of contained character strings are set as the search character string.

  Further, when the appearance rate in the document information of the search character string is specified in the document information search means, the search character string set by the search character string setting means is included with the specified appearance rate. If the document information is searched, it is possible to search for document information that includes the search character string at a desired appearance rate.

  In the display means for displaying a screen for designating the search character string and the appearance rate, and the number of document information searched by the document information search means, the number of document information searched by the document information search means is When the specified number is exceeded, the search range can be arbitrarily changed according to the search result by displaying a screen for changing at least the appearance rate and the number of document information searched by the document information search means. it can.

  As described above, in the present invention, when a search character string for searching for document information is designated, the contained character string included in the document information group to be searched is searched according to the search character string. Since the document information is searched by being set in the column, even if a character string that is not included in all the document information to be searched is specified as the search character string, it is specified. Document information can be searched based on the search character string.

  Further, in the search character string setting means, when there are a plurality of contained character strings set as the search character string and at least one contained character string is designated from the plurality of contained character strings, the designated contained character string In the configuration in which only the character string is set as the search character string, the document information to be searched can be narrowed down after a plurality of contained character strings are set as the search character string.

  Further, when the appearance rate in the document information of the search character string is specified in the document information search means, the search character string set by the search character string setting means is included with the specified appearance rate. In a configuration in which document information is searched, it is possible to search for document information including a search character string with a desired appearance rate.

  In the display means for displaying a screen for designating the search character string and the appearance rate, and the number of document information searched by the document information search means, the number of document information searched by the document information search means is When the number exceeds the specified number, at least the appearance rate and the screen for changing the number of document information searched by the document information search means are displayed. It can be changed arbitrarily.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an embodiment of an information search system of the present invention.

  In this embodiment, as shown in FIG. 1, search keywords are managed in advance using a similar word database 60 and a document information database 70, and thereafter, when a search keyword is designated, based on the search keyword managed in advance. Document information is searched from the document information database 70, and includes an input unit 10, a keyword management unit 20 that is a character string management unit, a keyword setting unit 30 that is a search character string setting unit, and a document information search unit. 40 and a display unit 50.

  In the input unit 10, a search condition is input to a search keyword that is a search character string for searching for document information registered in the document information database 70 and a screen displayed on the display unit 50.

  The keyword management unit 20 manages character strings that are contained character strings included in a plurality of pieces of document information constituting the document information group registered in the document information database 70, and refers to the similar word database 60 to The similar word character string similar to the contained character string included in the document information registered in the information database 70 is managed. The contained character string and the similar word character string similar to the contained character string are managed in association with each other.

  When the search keyword input via the input unit 10 is a character string managed as a character string included in the document information by the keyword management unit 20, the keyword setting unit 30 uses the character string as a search keyword. When the search keyword set and input via the input unit 10 is a character string managed as a similar word character string by the keyword management unit 20, the keyword management unit 20 uses the similar word character string. A character string managed in association with is set as a search keyword.

  The document information search unit 40 searches the document information database 70 for document information using the search keyword set by the keyword setting unit 30.

  The display unit 50 displays a screen for designating document information searched by the document information search unit 40 and a search condition for the document information.

  Below, the information search method in the information search system comprised as mentioned above is demonstrated.

  First, a search keyword management method in the keyword management unit 20 will be described.

  FIG. 2 is a flowchart for explaining a search keyword management method in the keyword management unit 20 in the information search system shown in FIG.

  When the document information is created and the created document information is registered in the document information database 70 (step S1), first, in the keyword management unit 20, a character string included in the document information registered in the document information database 70 is displayed. Extracted (step S2). Note that in the character string extracted from the document information by the keyword management unit 20, for example, a noun phrase or a phrase constituting the document information can be considered.

  Next, the keyword management unit 20 determines whether each character string extracted from the document information is already registered and managed as a contained character string in a table of the keyword management unit 20 described later. (Step S3) If the character string is not yet registered, the character string extracted from the document information is registered and managed in the table of the keyword management unit 20 as a contained character string included in the document information (Step S3). S4).

  Next, the keyword management unit 20 refers to the similar word database 60, extracts similar word strings for each character string extracted from the document information and registered in the keyword management table 20 as a contained character string. Search is performed (step S5). The similar term database 60 is a similar term database that is generally used.

  Thereafter, the keyword management unit 20 associates the similar word character string retrieved from the similar word database 60 in step S5 with the character string registered in the table as the contained character string in step S4, and then manages the keyword management unit 20. Are registered and managed in the table (step S6).

  FIG. 3 is a diagram illustrating a configuration example of a table provided in the keyword management unit 20 illustrated in FIG.

  As shown in FIG. 3, the table provided in the keyword management unit 20 includes a contained character string extracted from the document information in step S2 and a similar word in step S5 as a character string similar to the contained character string. Similar word character strings retrieved from the database 60 are registered in association with each other. Some character strings extracted from the document information in step S2 are associated with the same similar word string. For example, in the example shown in FIG. 3, the similar word a is registered as a similar word character string similar to the character string 1 and the character string 3.

  Next, as described above, after the contained character string included in the document information registered in the document information database 70 and the similar word character string similar to the contained character string are registered in the keyword management unit 20, the document information database 70. A process for retrieving the document information registered in the above will be described.

  FIG. 4 is a flowchart for explaining processing when searching for document information registered in the document information database 70 in the information search system shown in FIG.

  When searching for document information registered in the document information database 70 in the information search system shown in FIG. 1, a search condition specifying screen for specifying a search condition for document information is displayed on the display unit 50 (step S11). ).

  FIG. 5 is a diagram showing an example of a search condition designation screen displayed on the display unit 50 in the information search system shown in FIG.

  As shown in FIG. 5, the search condition designation screen displayed on the display unit 50 includes an area 1 for designating the maximum number of document information searched from the document information database 70 by the document information search unit 40. Specify the appearance rate in the document information of the area 2 for specifying the search keyword for searching the document information and the search keyword set according to the search keyword input to the area 2 by the keyword setting unit 30 A region 3 is provided.

  In the search condition designation screen as shown in FIG. 5, the maximum number of document information searched from the document information database 70 by the document information search unit 40 is input to the area 1, and the document information is searched. And the appearance rate in the document information of the search keyword set according to the search keyword input to the area 2 by the keyword setting unit 30 is input to the area 3. When the search condition is specified (step S12), first, the keyword setting unit 30 manages the search keyword input in the area 2 as a contained character string included in the document information by the keyword management unit 22. It is judged whether it is a thing. In the keyword management unit 22, as shown in FIG. 3, the contained character string included in the document information registered in the document information database 70 and the similar word character string similar to the contained character string are associated with each other. First, it is determined whether or not the search keyword input in the area 2 is a contained character string included in the document information registered in the document information database 70.

  When the search keyword input to the area 2 is managed as a contained character string included in the document information by the keyword management unit 22, the search keyword input to the area 2 is Are set as search keywords for searching document information.

  On the other hand, if the search keyword input to the area 2 is not managed as a contained character string included in the document information by the keyword management unit 22, the keyword management unit 22 manages the search keyword. The search keyword input in the area 2 is searched from the similar word character strings that are stored, and the contained character string that is associated with the similar word character string is extracted, and the contained character string searches the document information. Is set as a search keyword. For example, among the similar word character strings registered in the table shown in FIG. 3, when the similar word a is input to the region 2 as a search keyword, the contained character string included in the document information registered in the document information database 70. Among the character strings 1 to n registered as “”, character strings 1 and 3 registered in association with the similar word “a” are extracted and set as search keywords.

  Thus, regardless of whether or not the search keyword input through the input unit 10 is included in the document information group including a plurality of document information registered in the document information database 70, the keyword setting unit 30 A character string included in the document information registered in the document information database 70 is set as a search keyword (step S13).

  When the search keyword is set by the keyword setting unit 30, the document information search unit 40 searches for document information from the document information database 70 using the search keyword set by the keyword setting unit 30 (step S14). . At this time, in the document information search unit 40, the keyword set by the keyword setting unit 30 has the appearance rate specified in the area 3 on the search condition specification screen shown in FIG. Document information is retrieved.

  Thereafter, when the number of document information retrieved from the document information database 70 by the document information retrieval unit 40 is equal to or less than the number designated in the area 1 shown in FIG. 5 (step S15), from the document information database 70. The retrieved document information is displayed on the display unit 50 (step S16). The display of the document information on the display unit 50 is not limited to displaying the document information itself retrieved from the document information database 70, but displays information that can identify the document information such as the title and subject of the document information. It is conceivable.

  On the other hand, if the number of document information retrieved from the document information database 70 by the document information retrieval unit 40 exceeds the number specified in the area 1 shown in FIG. The retrieved search keyword is displayed on the display unit 50 (step S17). Here, the search keyword set by the keyword setting unit 30 may be one or a plurality of search keywords. In a plurality of search keywords, document information including at least one of the plurality of search keywords is included. The document information database 70 is searched.

  This is a case where a plurality of search keywords are displayed on the display unit 50 (step S18). Thereafter, when the search keywords are narrowed down by specifying at least one search keyword among the plurality of search keywords (step S19). ) In the keyword setting unit 30, the narrowed search keyword is set as a search keyword for searching for document information. Thereafter, the document information search unit 40 uses the search keyword to retrieve document information from the document information database 70. Is searched (step S20). Also in this case, in the document information search unit 40, the keyword set in the keyword setting unit 30 has the appearance rate specified in the area 3 on the search condition specification screen shown in FIG. The document information is retrieved.

  Thereafter, when the number of document information retrieved from the document information database 70 by the document information retrieval unit 40 is equal to or less than the number designated in the area 1 shown in FIG. 5 (step S21), from the document information database 70. The retrieved document information is displayed on the display unit 50.

  Further, when only one search keyword is displayed on the display unit 50, when a plurality of keywords are displayed on the display unit 50, the search keyword is not narrowed down, or the document information search unit 40 is displayed. If the number of document information retrieved from the document information database 70 exceeds the number specified in the area 1 shown in FIG. 5, the search condition change for changing the search condition specified in step S12 A screen is displayed on the display unit 50 (step S22). In the search condition change screen displayed on the display unit 50, the number of designated document information is posted in the area 1 and the designated search keyword is displayed in the area 2 with respect to the search condition designation screen shown in FIG. The appearance rate of the designated character string is posted in the area 3, and the conditions posted in the areas 1 to 3 are changed (step S23). In the search condition change screen displayed on the display unit 50, it is not always necessary to post the designated search keyword. An area for changing the number of document information to be searched and a character string It is sufficient that at least an area for changing the appearance rate in the document information is provided.

  Thereafter, the process returns to step S14, and the document information search unit 40 searches the document information database 70 for document information using the search keyword set in the keyword setting unit 30 and the appearance rate changed in step S23. Will be. In the subsequent processes in steps S15 and S21, the number of document information changed in step S23 is used.

It is a figure which shows one Embodiment of the information search system of this invention. 3 is a flowchart for explaining a search keyword management method in a keyword management unit in the information search system shown in FIG. 1. It is a figure which shows the structural example of the table provided in the keyword management part shown in FIG. 4 is a flowchart for explaining processing when searching for document information registered in a document information database in the information search system shown in FIG. It is a figure which shows an example of the search condition designation | designated screen displayed on a display part in the information search system shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Input part 20 Keyword management part 30 Keyword setting part 40 Document information search part 50 Display part 60 Similar word database 70 Document information database

Claims (4)

An information search system for searching for document information corresponding to a specified search character string from a document information group consisting of a plurality of document information,
A character string management means for managing a contained character string included in the document information group and a similar word character string similar to the contained character string in association with each other;
When the specified search character string is a character string managed as a contained character string by the character string management means, the contained character string is set as a search character string, and the designated search character When the string is a character string managed as a similar word character string by the character string managing means, the contained character string managed in association with the similar word character string by the character string managing means is searched. Search string setting means to set in the string,
An information search system comprising: document information search means for searching for document information based on the search character string set by the search character string setting means. The information search system according to claim 1,
The search character string setting means, when there are a plurality of contained character strings set as the search character string, and at least one contained character string is designated from the plurality of contained character strings, the designated contained character string An information search system characterized in that only a column is set as a search character string. In the information search system according to claim 1 or 2,
When the appearance rate in the document information of the search character string is specified, the document information search unit includes the search character string set by the search character string setting unit with the specified appearance rate Information retrieval system characterized by retrieving document information to be retrieved. In the information search system according to claim 3,
A screen for designating the search character string and the appearance rate, and the number of document information searched by the document information search means is displayed, and the number of document information searched by the document information search means is An information search system comprising display means for displaying a screen for changing at least the appearance rate and the number of document information searched by the document information search means when a specified number is exceeded.

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