JP2005056154A - Document retrieving system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a document retrieval processor for accurately grasping the characteristics of a document group acquired as a retrieval result by checking whether or not the combination of a plurality of words arbitrarily selected by each user is included in a plurality of documents to be retrieved at the same time. <P>SOLUTION: A document retrieval processing part 101 of a document retrieving system 100 includes a frequency calculation processing part 104 for calculating the frequency of keywords and relevant keywords included in a document acquired as a retrieval result, and the retrieval result and each frequency calculation result are displayed at a Web page 110. Regarding the combination of keywords arbitrarily selected by each user, a relevant keyword registration processing part 103 accepts a registration request as a relevant keyword, and stores it in a relevant keyword database 109. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a document search apparatus that performs a search process based on a search keyword from a specific set of documents stored in a document database, and in particular includes means for calculating the appearance frequency of a search keyword in a document acquired as a search result. Related to the configuration.

2. Description of the Related Art Conventionally, it is known that there is a document search apparatus that searches a document including an arbitrary search keyword from a plurality of documents stored in a document database.
According to the conventional technology, for the document set that is the target of the search result, first, the user needs to grasp the characteristics of the document to be searched, and to extract and select an appropriate search keyword for the document set to be searched. Therefore, a search device having means for calculating an appearance frequency of a keyword indicating a feature appearing in each document set and displaying a keyword having a high appearance rate as a related keyword is known (for example, patents). (See Reference 1.)
Japanese Patent Laid-Open No. 11-025108

However, in the document search apparatus described in Patent Document 1, since the appearance frequency is calculated for each keyword for the document set to be searched, it is difficult to accurately determine the document characteristics. It was.
That is, in the document search process, in order to accurately grasp the characteristics of the document set, it is necessary to examine whether or not a combination of a plurality of arbitrarily selected words is included at the same time. The document search apparatus described in Document 1 only calculates the appearance frequency for each keyword, and thus cannot calculate the appearance frequency for any combination of words.
Therefore, each user needs to check for each document whether or not any combination of a plurality of words is included, which is a very complicated operation.

  The present invention is to solve the above-mentioned problem, and by searching whether or not a plurality of word combinations arbitrarily selected by each user are simultaneously included in a plurality of documents to be searched, a search result is obtained. It is an object of the present invention to provide a document search processing apparatus that can accurately grasp the characteristics of a document set acquired as and can select an appropriate related keyword.

In order to solve the above problems, the present invention provides a document search apparatus that performs a document search process based on an arbitrary search keyword from a set of documents stored in a document database. The document search apparatus stores accessible information. As a means, a related keyword storage means for storing a related keyword composed of a plurality of arbitrarily selected keywords is provided, and a related keyword stored in advance in the related keyword storage means from each document acquired as a document search processing result. A frequency calculating means is provided for calculating a related keyword frequency indicating the number of documents including the keyword, and displaying the related keyword frequency for each related keyword.
Further, the document search device stores a combination of a plurality of keywords arbitrarily selected by each user or a combination of a keyword and a related keyword as a related keyword in the related keyword storage unit for each user. Is further provided.
In addition, the frequency calculation means displays a keyword frequency indicating an appearance frequency for each keyword that can be used as a search keyword for each document acquired as a document search processing result, and displays the related keyword frequency and the keyword frequency. The related keyword registering means includes a combination of a plurality of keywords arbitrarily selected from the keywords or related keywords displayed together with the respective frequencies, or a combination of a keyword and a related keyword. It stores in the said related keyword storage means as a keyword, It is characterized by the above-mentioned.
The frequency calculation means displays a keyword frequency indicating an appearance frequency for each keyword that can be used as a search keyword for a document arbitrarily designated by a user, and displays the related keyword frequency and the keyword frequency. And the related keyword registration means displays a combination of a plurality of keywords or a combination of a keyword and a related keyword arbitrarily selected from the keywords or related keywords displayed together with the respective frequencies. Is stored in the related keyword storage means.

With the above configuration, in the present invention, the number of documents including each related keyword is displayed as the related keyword frequency for the document set acquired as a search result. Therefore, the characteristics of the document set can be accurately determined based on the related keyword frequency. This makes it possible to select an appropriate keyword in the document search. Therefore, it becomes easy for the user to acquire a desired document.
In this case, since a combination of keywords arbitrarily selected by each user is registered as a related keyword, it is possible to calculate a related keyword frequency for the related keyword for each user, and a document having characteristics required by each user. It is possible to appropriately determine whether or not.
In addition, for a document acquired as a search result, the user is displayed because a keyword combination arbitrarily selected from keywords or related keywords displayed together with keyword frequency and related keyword frequency is registered as a related keyword. According to each frequency, it is possible to select an appropriate keyword combination as a related keyword.
In addition, for an arbitrarily designated document, since a keyword combination selected arbitrarily from keywords or related keywords displayed together with the keyword frequency and the related keyword frequency is registered as a related keyword, the user can register a predetermined document. It is possible to easily select a related keyword for searching for a document having the same characteristics.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration of a document search apparatus according to an embodiment of the present invention.
The document search apparatus 100 according to the present embodiment includes a document search processing unit 101, a keyword display processing unit 102, and a related keyword registration unit 103 as each processing unit. The document search processing unit 101 includes a frequency calculation processing unit 104. The document database 105, the keyword database 106, the keyword frequency database 107, the user database 108, and the related keyword database 109 are provided as information storage means that the processing units 101 to 104 can access.
The document search apparatus 100 displays a search condition input screen, a search result display screen, and the like on a Web page 110 that can be accessed by a browser of a client terminal connected via a network.
The document search processing unit 101 performs a document search process for documents stored in the document database 105 based on a search condition such as a search keyword or a document ID input from the Web page 110. At this time, the frequency calculation processing unit 104 calculates the frequency of the keyword and the related keyword included in the document acquired as the search result, and displays the search result and the keyword frequency calculation result on the Web page 110.
The keyword display processing unit 102 acquires keywords stored in the keyword database 106 and displays a list of keywords that can be registered as related keywords on the Web page 110.
The related keyword registration processing unit 103 accepts a registration request as a related keyword for a combination of keywords arbitrarily selected by each user and stores it in the related keyword database 109.

FIG. 2 is a view showing an example of the data structure of a record stored in the document database 105.
The document database 105 stores information about documents to be searched. Each record 200 includes a document ID 201 for uniquely identifying each document, a title 202 for each document, an author 203 for each document, , And the document content 204 of the full text of each document.

FIG. 3 is a diagram illustrating an example of a data structure of a record stored in the keyword database 106.
The keyword database 106 stores keywords that can be used as search keywords included in each document, and each record 300 includes a keyword ID 301 and a keyword 302 for uniquely identifying each keyword.

FIG. 4 is a diagram illustrating an example of a data structure of a record stored in the keyword frequency database 107.
The keyword frequency database 107 stores information on the appearance frequency of each keyword stored in the keyword database 106 for each document stored in the document database 105. Each record 400 includes a document ID 401, a keyword ID 402, , And a frequency 403 indicating the appearance frequency of each keyword in each document.

FIG. 5 is a diagram illustrating an example of a data structure of a record stored in the user database 108.
The user database 108 stores information regarding users who use the document search apparatus 100, and the record 500 includes a user ID 501 that uniquely identifies each user and a password 502.

FIG. 6 is a diagram illustrating an example of a data structure of a record stored in the related keyword database 109.
The related keyword database 109 stores a combination of keywords arbitrarily selected for each user as a related keyword, and the record 600 includes a user ID 601 and a related keyword 602. Here, in the related keyword 602, keyword IDs of a plurality of keywords constituting each related keyword are stored in a comma separated manner.

Each process performed by the document search apparatus according to the present embodiment with the above configuration will be described.
FIG. 7 is a flowchart showing a search processing procedure based on a search keyword as document search processing performed by the document search device.
The document search processing unit 101 of the document search apparatus 100 receives a search keyword designation from the user terminal that has accessed the Web page (step 701), and performs document search processing (step 702). In the document search process, the keyword ID is acquired from the keyword database 106 for the specified search keyword, and the document ID 401 is acquired from the keyword frequency database 107 based on the keyword ID.
The frequency calculation processing unit 104 of the document search processing unit 101 acquires the frequency 403 of each keyword stored in the keyword frequency database 107 for the document acquired as the search result, calculates the total (step 703), and searches. The appearance frequency of the related keyword registered for the requesting user is calculated (step 704).
In the calculation of the related keyword appearance frequency in step 704, the related keyword 602 is acquired from the related keyword database 109 based on the user ID of the user who made the search request, and the total number of documents including the related keyword 602 is calculated. .
When the total number of documents including the related keyword 602 is calculated, the keyword ID 301 is obtained from the keyword database 106 for each keyword constituting the related keyword, and the keyword frequency database 107 is used for the related keyword based on the keyword ID 301. The document ID 401 of a document including all keywords constituting the keyword is acquired.
The document search processing unit 101 displays the document acquired as a search result and the appearance frequencies of the keywords and related keywords acquired by the frequency calculation processing unit 104 on the Web page 110 as search results (step 705).
Thereafter, when there is a narrow search request from the user terminal (step 706), the document search processing unit 101 performs the search process again (steps 701 to 705). In this case, the keyword used for the refinement search can be specified from the keyword displayed together with the appearance frequency or the related keyword.
If there is a document browsing request for a document acquired as a search result (step 708), the document content stored in the document database 105 for the designated document is displayed on the Web page 110.

FIG. 8 is a flowchart showing a related keyword registration processing procedure performed by the document search apparatus 100.
The keyword display processing unit 102 of the document search apparatus 100 accepts a keyword display request (step 801), acquires all keywords stored in the keyword database 105 (step 804), and lists the acquired keywords in the Web page 110. It is displayed (step 803).
When two or more keywords are designated for the displayed keyword by the user terminal (step 804), the related keyword registration processing unit 103 enters a keyword registration request waiting state, and receives a keyword registration request from the user terminal. Is received (step 805), a related keyword registration process is performed as a new related keyword (step 806). In specifying a keyword, even when one keyword and a related keyword are specified, it is handled as specifying two or more keywords.
In the related keyword registration process, the user ID of the user who made the keyword registration request and the keyword IDs indicating a plurality of keywords constituting the related keyword are associated with each other and stored in the related keyword database 109.
On the other hand, if two or more keywords are not specified or a keyword registration request is not made, the process ends without performing the related keyword registration process (steps 804 and 805).

FIG. 9 is a flowchart showing a processing procedure for registering a related keyword for a keyword included in each document displayed as a keyword search processing result.
As in the document search process shown in FIG. 7, the document search apparatus accepts a search keyword specified by the user terminal, performs a search process, performs a keyword frequency calculation process and a related keyword frequency calculation process, and sends the search results to the Web The information is displayed on the page 110 (steps 901 to 905).
When two or more keywords are designated for each keyword or related keyword displayed in relation to the appearance frequency calculation result (step 906), the related keyword registration processing unit waits for a keyword registration request. In response to a keyword registration request from the user terminal (step 907), a related keyword registration process is performed (step 908).
Thereafter, a narrowing request or a document browsing request from the user terminal is received and each process is performed (steps 908 to 910). If there is a narrow search request after the registration process is performed in step 908 (step 910), the related keyword frequency calculation process is also performed in step 904 for the newly registered related keyword.

FIG. 10 is a flowchart showing a processing procedure for registering a related keyword for a keyword included in each document displayed as a search processing result based on the document ID.
The document search apparatus accepts the specification of the document ID (step 1001), performs a document search process (step 1002), and calculates a keyword frequency for each document acquired as a search result as in the document search process shown in FIG. Processing and related keyword frequency calculation processing are performed, and the search result is displayed on the Web page 110 (steps 1003 to 1005).
When two or more keywords are designated for each keyword or related keyword displayed in relation to the appearance frequency calculation result (step 1006), the related keyword registration processing unit waits for a keyword registration request. In response to the keyword registration request from the user terminal (step 1007), the related keyword registration process is performed (step 1008).
Thereafter, when there is a document ID search request for a document ID newly input by the user terminal (step 1009), each process such as a document search process is performed (steps 1001 to 1008). If there is a document ID search request after the registration processing is performed in step 1008 (step 1009), the related keyword frequency calculation processing is also performed in step 1004 for the newly registered related keywords.

FIG. 11 is a diagram illustrating an example of a screen configuration of a menu display screen displayed on the Web page by the document search device.
The menu display screen 1100 includes a keyword search unit 1110, a document ID search processing unit 1120, and a link 1130 to the keyword display screen.
The keyword search unit 1110 has a search keyword input field 1111 and a keyword search processing button 1112. When a search keyword is input to the search keyword input field 1111 and the keyword search processing button 1112 is operated, the document search device Performs each process shown in FIG.
The document ID search unit 1120 has a document ID input field 1121 and a document ID search processing button 1122. When a document ID is input to the document ID input field 1121 and the document ID search processing button 1122 is operated, The document search apparatus performs each process shown in FIG.
When the link 1130 is operated, the document search apparatus performs each process shown in FIG.

FIG. 12 is a diagram showing an example of a search result display screen shown in step 905 of FIG. 9 as a result of operating the keyword search processing button 1112 on the menu display screen 1100 shown in FIG.
The keyword search result display screen 1200 includes a search keyword display unit 1210, a narrow search processing button 1220, a search result number display unit 1230, a document information display unit 1240, a related keyword registration processing button 1250, and a keyword display unit 1260. And a related keyword display unit 1270.
The search keyword display unit 1210 displays a search keyword input by the user, and further serves as a search keyword input field for performing a refined search.
The search result number display section 1230 displays the number of documents acquired as a search result and the number of documents from the number of all the acquired documents that are currently displayed. By operating each “Next” button, the document information displayed on the document information display unit 1240 is changed.
The document information display unit 1240 displays the document ID, title, and author for each document acquired as a search result, and each document ID is linked to the document content display screen.
In the present embodiment, the keyword display unit 1260 and the related keyword display unit 1270 display the keywords processed by the frequency calculation processing unit 104 of the document search processing unit 101 and the appearance frequencies of the related keywords. Here, the keyword frequency displayed in the keyword display unit 1260 represents how many times each keyword appears in all documents acquired as a search result. Moreover, the frequency of the related keyword displayed on the related keyword display unit 1270 indicates the number of documents including all of the plurality of keywords constituting the related keyword.
The keyword portion 1260 and the related keyword display portion 1270 are provided with check boxes 1261 and 1271, and the related keyword registration processing is performed in a state where the keyword to be registered as the related keyword or the check boxes 1261 and 1271 of the related keyword is checked. When the button 1240 is operated, the related keyword registration processing unit 103 performs a registration process for the checked keyword or related keyword. On the other hand, when the refinement search processing button 1220 is operated, the document search processing unit 101 uses the keyword displayed on the search keyword display unit 1210 and the checked keyword or related keyword as a search condition. Including search process.

FIG. 13 is a diagram showing an example of a search result display screen shown in step 1005 of FIG. 10 as a result of operating the document ID search processing button 1122 on the menu display screen 1100 shown in FIG.
The document ID search result display screen 1300 includes a document ID input / display unit 1310, a document ID search processing button 1320, a search result number display unit 1330, a related keyword registration processing button 1340, a document information display unit 1350, and a keyword display. And a search result display section of a related keyword display section 1370.
In the present embodiment, similar to the keyword search result display screen 1200 shown in FIG. 12, keywords processed by the frequency calculation processing unit 104 of the document search processing unit 101 are respectively displayed in the keyword display unit 1360 and the related keyword display unit 1370. And the appearance frequency of related keywords are displayed.
The keyword display unit 1360 and the related keyword display unit 1370 are provided with check boxes 1361 and 1371, and the keyword to be registered as the related keyword or the related keyword check box 1361 and 1371 is registered in a state where the check is put. When the processing button 1340 is operated, the related keyword registration processing unit 103 performs registration processing.
The document information display unit 1350 displays the document ID, title, and author, and a display screen for displaying the document contents is linked to the document ID.

FIG. 14 is a diagram showing an example of a screen that displays the keyword list shown in step 803 of FIG. 8 as a result of operating the link 1130 on the menu display screen 1100 shown in FIG.
The keyword list display screen 1400 includes an initial list display unit 1410 that indicates initials of each keyword, a specified character display unit 1420 that displays specified initials, a related keyword registration processing button 1430, and specified initials. A keyword list display unit 1440 that displays a list of keywords having a keyword, and a related keyword list display unit 1450 that displays already registered related keywords.
Each character displayed in the initial character list display unit 1410 is linked to a keyword list display screen for each character.
The keyword list display unit 1440 and the related keyword list display unit 1450 are provided with check boxes 1441 and 1451, and the keywords to be registered as related keywords or the related keyword check boxes 1441 and 1451 are checked and related. When the keyword registration processing button 1430 is operated, the related keyword registration processing unit 103 performs registration processing.

FIG. 15 is a diagram showing an example of a document content display screen linked to the document IDs of the document information display units 1250 and 1350 shown in FIGS.
The document content display screen 1500 displays a document ID 1510, a title 1520, an author 1530, and a document content 1540 based on information stored in the document database 105 for the specified document.

As described above, the document search apparatus according to the present embodiment displays the number of documents including each related keyword as the related keyword frequency together with the appearance frequency of the keyword that can be used as the search keyword for the document set acquired as the search result. Therefore, based on the related keyword frequency, it is possible to accurately grasp the characteristics of the document set, and it is possible to select an appropriate keyword in the document search. Therefore, it is possible for the user to easily obtain a desired document.
In this case, since a combination of keywords and the like arbitrarily selected by each user is registered as a related keyword for each user, the frequency of the related keyword selected for each user can be calculated. It is possible to appropriately determine whether or not the document has the desired characteristics. Further, by using a registered related keyword as a search keyword, it is possible to easily perform a periodic search process or the like for a document having a specific characteristic.
In addition, for the document set acquired as a search result, the user is displayed because the keyword combination arbitrarily selected from the keywords or the related keywords displayed together with the keyword frequency and the related keyword frequency is registered as the related keyword. Depending on the frequency, it is possible to select an appropriate keyword combination as a related keyword.
In addition, for an arbitrarily designated document, since a keyword combination selected arbitrarily from keywords or related keywords displayed together with the keyword frequency and the related keyword frequency is registered as a related keyword, the user can register a predetermined document. It is possible to easily select a related keyword for searching for a document having the same characteristics. Therefore, when searching for newly added papers or documents related to a specific field for a set of documents stored in the document database, the keyword extracted from the specific document can be arbitrarily selected. By registering in advance as related keywords, search processing based on appropriate search keywords can be performed.
Note that the configuration of the document search apparatus of the present invention is not limited to that shown in the above embodiment, and the configuration of each processing unit and the data structure in each database, etc., as long as the same processing can be performed. It may be changed. Each processing unit and each database may be configured by a plurality of terminals.

1 is a block diagram showing a schematic configuration of a document search apparatus according to an embodiment of the present invention. It is a figure which shows an example of the data structure of a document database. It is a figure which shows an example of the data structure of a keyword database. It is a figure which shows an example of the data structure of a keyword frequency database. It is a figure which shows an example of the data structure of a user database. It is a figure which shows an example of the data structure of a related keyword database. It is a flowchart which shows the search processing procedure by the document search apparatus concerning one embodiment of this invention. It is a flowchart which shows an example of the related keyword registration process procedure by the document search device concerning one embodiment of the present invention. It is a flowchart which shows the other example of the related keyword registration process procedure by the document search apparatus concerning one embodiment of this invention. It is a flowchart which shows the other example of the related keyword registration process procedure by the document search apparatus concerning one embodiment of this invention. It is a figure which shows an example of a screen structure of the menu display screen which a document search device displays. It is a figure which shows an example of a screen structure of the keyword search result display screen which a document search device displays. It is a figure which shows an example of the screen structure of the document ID search result display screen which a document search device displays. It is a figure which shows an example of the screen structure of the keyword list display screen which a document search device displays. It is a figure which shows an example of the screen structure of the document content display screen which a document search apparatus displays.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 Document search apparatus 101 Document search process part 102 Keyword display process part 103 Related keyword registration process part 104 Frequency calculation process part 105 Document database 106 Keyword database 107 Keyword frequency database 108 User database 109 Related keyword Database, 110 Web page.

Claims (4)

In a document search apparatus that performs a document search process based on an arbitrary search keyword from a set of documents stored in a document database,
The document search apparatus includes, as accessible information storage means, related keyword storage means for storing a related keyword composed of a plurality of arbitrarily selected keywords,
From each document acquired as a document search processing result, a related keyword frequency indicating the number of documents containing the related keyword stored in the related keyword storage unit in advance is calculated, and the frequency calculation for displaying the related keyword frequency for each related keyword A document retrieval apparatus comprising: means. The document search apparatus further includes a related keyword registration unit that stores a combination of a plurality of keywords arbitrarily selected by each user or a combination of a keyword and a related keyword as a related keyword in the related keyword storage unit for each user. The document retrieval apparatus according to claim 1, further comprising: The frequency calculating means includes
For each document acquired as a document search processing result, it has means for calculating a keyword frequency indicating an appearance frequency for each keyword that can be used as a search keyword, and means for displaying the related keyword frequency and the keyword frequency,
The related keyword registration means includes a combination of a plurality of keywords arbitrarily selected from the keywords displayed with the respective frequencies or the related keywords or a combination of a keyword and a related keyword as the related keyword. The document search device according to claim 2, wherein the document search device is stored in the document search device. The frequency calculating means includes
Means for calculating a keyword frequency indicating an appearance frequency for each keyword that can be used as a search keyword for a document arbitrarily designated by a user; and means for displaying the related keyword frequency and the keyword frequency;
The related keyword registration means includes a combination of a plurality of keywords arbitrarily selected from the keywords displayed with the respective frequencies or the related keywords or a combination of a keyword and a related keyword as the related keyword. The document search device according to claim 2, wherein the document search device is stored in the document search device.

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