JP2007140639A - Data display device, data display method and data display program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display another keyword of high appearance frequency, in a document group including a certain keyword so as to be obtained at a glance. <P>SOLUTION: A data display device 1 calculates a frequency that each keyword in a document group in a bibliographic data DB 19 appears in the document group and a score of the keyword, sets priority for each keyword based on the frequency and the score, sorts pieces of document data on respective documents in descending order of the document having a keyword of higher priority, and displays them on a screen. Furthermore, the data display device 1, on a screen on which the document data is displayed, displays, respective keywords in the descending order of priority, and displays, information indicating whether or not a document corresponding to each piece of document data displayed on the screen includes each keyword displayed on the screen. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data display technique, and more particularly, to a data display device, a data display method, and a data display program that perform display so that other keywords with high appearance frequency can be understood at a glance in a document group including a certain keyword.

  Conventionally, there has been a technique for calculating the frequency of keywords included in a document and displaying the calculated frequency.

Further, for example, a technique for displaying data in a tabular format is described in Non-Patent Document 1 below.
Standard Excel all functions Bible 2003, Yoshinori Murata, Technical Review, 2004.2.1 published

  However, in the above prior art, priority is set for each keyword based on the appearance frequency of the keyword included in the document group, and the document data of each document is stored in the order of the document including the higher priority keyword. It is not sorted and displayed.

  Therefore, in the related art, for example, in a document group including a certain keyword, it is not possible to display such that other keywords with high appearance frequency can be grasped at a glance. In the prior art, it is impossible to grasp the co-occurrence relationship between keywords such as which keywords co-occur in a document including a certain keyword.

  The present invention solves the above-mentioned problems of the prior art, and in a document group including a certain keyword, a data display device, a data display method, and a data display for performing display so that other keywords with high appearance frequency can be grasped at a glance The purpose is to provide a program.

  In order to solve the above-described problems, the present invention provides a data display device that extracts a keyword included in a document group composed of a plurality of documents, and the document for each of the extracted keywords. Frequency calculation means for calculating the frequency of appearance in the group, score calculation means for calculating the score of each keyword based on the calculated frequency, and the calculated score as the priority of each keyword A data sorting means for sorting the document data of the documents constituting the document group in the order of the documents including the set higher priority keywords, and displaying the sorted document data on the screen as display data On the same screen as the screen on which the document data is displayed on the screen, the keywords are displayed as display data in descending order of priority. Display means for displaying a screen, and the display means further displays on the screen information indicating whether a document corresponding to each document data displayed on the screen includes each keyword displayed on the screen as display data. It is characterized by that.

  In addition, the present invention is a data display device, and based on an input document in a document group and a keyword included in each document, a frequency for calculating the frequency of occurrence of each keyword in the document group A calculating means; a score calculating means for calculating a score of each keyword based on the calculated frequency; and the calculated score is set as a priority of each keyword, and the set priority is more A data sorting means for sorting document data of documents constituting the document group in order of documents including a high keyword, and a screen on which the document data is displayed on the screen while displaying the sorted document data as display data. Display means for displaying each of the keywords as display data in descending order of priority on the same screen. In, characterized in that the screen displays information document for each document data said screen display indicates whether contains the keywords that are the screen display as display data.

  In the data display device, the present invention further includes a keyword selection unit that selects a keyword, and a frequency at which each keyword extracted by the keyword extraction unit appears in a document group including the selected keyword. Internal frequency calculation means for calculating the internal frequency and internal score calculation means for calculating the internal score of each keyword based on the internal frequency calculated by the internal frequency calculation means, and the data sorting means The calculated internal score is set as the priority of each keyword, and the document data of the documents constituting the document group is sorted in the order of the document including the keyword with the higher priority set. To do.

  In the data display device according to the present invention, the internal frequency calculation unit may further include: the plurality of keywords selected by the keyword selection unit; The frequency of appearing in a document group including all of the plurality of selected keywords is calculated as the internal frequency.

  Further, according to the present invention, in the data display device, the score calculation unit is configured to calculate each keyword based on the number of characters of each keyword extracted by the keyword extraction unit and the frequency calculated by the frequency calculation unit. The data sorting means sets the priority of each keyword based on the frequency calculated by the frequency calculating means and the score calculated by the score calculating means, and calculates the internal frequency. Based on the internal frequency calculated by the means and the internal score calculated by the internal score calculating means, the priority of each keyword is updated, and the document including the keyword with the higher priority is updated in the order of the document. The document data constituting the document group is sorted.

  In the data display device according to the present invention, the display unit may display information indicating how many keywords displayed on the screen include a document corresponding to each document data displayed on the screen. As a screen display.

  Further, in the data display device according to the present invention, for the document including a keyword whose frequency calculated by the frequency calculating unit is less than a predetermined threshold, the document has the frequency Information indicating that a keyword that is less than a threshold value is included is displayed on the screen as display data in a display area that is different from a display area that displays a keyword whose frequency is equal to or higher than a predetermined threshold value.

  The data display device may further include display data designating means for designating display data to be displayed on the screen by the display means, wherein the display means is a display designated by the display data designating means. Only the data is displayed on the screen.

  In the data display device according to the present invention, the data sorting unit sorts the document data of the documents constituting the document group in descending or ascending order with respect to dates related to each document.

  The present invention is also a data display method, comprising: extracting a keyword included in a document group composed of a plurality of documents; and a frequency at which each of the extracted keywords appears in the document group. A step of calculating, a step of calculating a score of each keyword based on the calculated frequency, and setting the calculated score as a priority of each keyword, and the set priority is higher Sorting document data of documents constituting the document group in order of documents including keywords, displaying the sorted document data on the screen as display data, and the same screen as the screen on which the document data is displayed on the screen In the above, displaying each of the keywords as display data in order of the priority, and displaying each sentence displayed on the screen Document corresponding to the data is characterized by a step of screen display information indicating that contains each keyword that is the screen display as display data.

  Further, the present invention is a program for causing a computer included in a data display device to execute a program, wherein the computer extracts a keyword included in a document group composed of a plurality of documents, and the extraction Frequency calculation means for calculating the frequency of each keyword appearing in the document group, score calculation means for calculating the score of each keyword based on the calculated frequency, and the calculated score A data sorting unit configured to sort document data of documents constituting the document group in the order of documents including a keyword having a higher priority set and set as the priority of each keyword; and the sorted document data Is displayed as display data on the same screen as the screen on which the document data is displayed on the screen. A program for causing a keyword to function as a display unit that displays a screen as display data in descending order of priority, wherein the display unit further displays a document corresponding to each document data displayed on the screen. Information indicating whether or not each keyword is included is displayed on the screen as display data.

  The data display device of the present invention sets the priority for each keyword based on the appearance frequency of the keyword included in the document group, and the document data of each document in the order of the document including the higher priority keyword. Sort and display on the screen.

  Further, the present invention displays each keyword on the same screen as the screen on which the document data is displayed on the screen in order of priority, and displays the document corresponding to each document data displayed on the screen on the screen. Information indicating whether each keyword is included is displayed on the screen.

  Therefore, according to the present invention, in a document group including a certain keyword, it is possible to display such that other keywords with high appearance frequency can be grasped at a glance. Further, according to the present invention, it is possible to easily grasp the co-occurrence relationship between keywords, such as which keywords co-occur in a document including a certain keyword.

  Further, according to the present invention, it is possible to estimate the outline of each document by looking at the keywords included in each displayed document data.

  Further, according to the present invention, for example, if the user selects keywords displayed on the screen in descending order of priority, the internal score calculated based on the frequency of each keyword appearing in the document group including the selected keyword. Based on the above, the priority of the keyword is set, and the document data of the documents constituting the document group is re-sorted in the order of the document including the keyword having the higher priority set. Therefore, according to the present invention, it is not necessary for the user to input the keyword that the user has come up with, and it is possible to sort the document data only by selecting the keyword displayed on the screen. In particular, since the keywords displayed on the screen are arranged in the order of priority, the user can easily find keywords useful to the user by viewing each keyword in order from the keyword with the highest priority on the screen. It will be possible to find and select.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an example of a system configuration of the present invention. The data display device 1 is a processing device that sorts document data of documents in a document group and displays them on a screen.

  The data display device 1 includes a keyword extraction unit 11, a frequency calculation unit 12, a score calculation unit 13, a data sorting unit 14, a display unit 15, a keyword selection unit 16, an internal frequency calculation unit 17, an internal score calculation unit 18, and a bibliographic data database. (DB) 19 and a display data designation unit 20 are provided.

  The keyword extraction unit 11 extracts keywords included in the document group accumulated in the bibliographic data DB 19. A keyword extraction method by the keyword extraction unit 11 will be described later.

  The frequency calculation unit 12 calculates the frequency at which each keyword extracted by the keyword extraction unit 11 appears in the document group stored in the bibliographic data DB 19. Here, the keyword frequency means, for example, the number of documents in which the keyword appears. For example, when the number of documents including the keyword “Japanese” is 20, the frequency of the calculated keyword “Japanese” is 20. Further, in the embodiment of the present invention, it is possible to adopt a configuration in which the frequency of keywords appears in the document group.

  The score calculation unit 13 calculates the score of each keyword based on the number of characters of each keyword extracted by the keyword extraction unit 11 and the frequency calculated by the frequency calculation unit 12. The score of each keyword is calculated as, for example, a value obtained by multiplying the number of characters of each keyword by the frequency.

  In the embodiment of the present invention, the score of each keyword is calculated using a predetermined calculation formula based on the frequency calculated by the frequency calculation unit 12 without using the number of characters of each keyword extracted by the keyword extraction unit 11. It is also possible to adopt a configuration for calculating.

  For example, the score calculation unit 13 calculates the score of each keyword using a score calculation method using the TF / IDF method or an Okapi weighting method as described below.

(Score calculation method using TF / IDF method)
In general, the TF / IDF method is mainly used for searching for documents containing important keywords. Here, TF generally means the number of occurrences of a keyword in a document, and IDF generally means the reciprocal of the number of documents in which the keyword appears among a number of documents prepared in advance. .

  In general, in the TF / IDF method, a document having a high Score (D) calculated by the following formula is output as a search result.

Score (D) = Σ (tf (w, D) × log (N / df (w)))
In the above formula, w is a keyword input by the user, and Σ means that tf (w, D) × log (N / df (w)) is added by w∈W. W means a set of keywords input by the user. Tf (w, D) is the number of occurrences of w in the document D, df (w) is the number of documents in which w appears in all documents, and N is the total number of documents.

  In applying the TF / IDF method to the present invention, for example, tf (w, D) is calculated using the document D as a document group stored in the bibliographic data DB 19. In addition, for example, a large number of documents stored in a database (not shown) different from the bibliographic data DB 19 is defined as “all documents” described in the explanation of the meaning of df (w), and df (w) Is calculated.

  Then, the product of the calculated tf (w, D) and log (N / df (w)) is calculated as the score of each keyword w.

(Score calculation method using Okapi's weighting method)
In general, in the Okapi weighting method (see the following document (1)), a document having a high Score (D) calculated by the following equation is output as a search result.

  Reference (1): Masaki Murata, Mao, Kiyotaka Uchimoto, Hiromi Osaku, Masao Uchiyama, Hitoshi Isahara, Information Retrieval using Location Information and Field Information, Natural Language Processing (Journal of the Language Processing Society), April 2000 , Vol. 7, No. 2, p. 141-p. 160

  Here, w is a keyword input by the user, and W is a set of keywords input by the user. Tf (w, D) is the number of occurrences of w in the document D, df (w) is the number of documents in which w appears in all documents, and N is the total number of documents. Also, length (D) is the length of document D (character string unit). Δ is the average of the document lengths in all documents.

  In applying Okapi's weighting method to the present invention, for example, the document D is set as a document group stored in the bibliographic data DB 19.

  Is calculated. Let the calculated value be the term tf.

  Further, for example, a large group of documents stored in a database (not shown) different from the bibliographic data DB 19 is log (N / N) as “all documents” described in the explanation of the meaning of df (w). df (w)) is calculated. The calculated log (N / df (w)) is defined as an idf term. Then, the product of the calculated tf term and idf term is calculated as the score of each keyword w.

  The data sorting unit 14 extracts document data (eg, document title, author name, etc.) from the documents stored in the bibliographic data DB 19 and sorts the extracted document data.

  That is, the data sorting unit 14 first stores the extracted document data in a buffer (not shown). Then, the data sort unit 14 sets the priority of each keyword based on the frequency of each keyword calculated by the frequency calculation unit 12 and the score of each keyword calculated by the score calculation unit 13.

  The data sorting unit 14 sets a higher priority for a keyword having a higher frequency calculated by the frequency calculating unit 12. The data sorting unit 14 sets a higher priority for keywords having the same frequency, as the keyword has a higher score calculated by the score calculation unit 13.

  In the embodiment of the present invention, the data sorting unit 14 may adopt a configuration in which the score of each keyword calculated by the score calculation unit 13 is set as the priority of each keyword.

  The priority of each keyword defines the display order of each keyword displayed together with the document data by the display unit 15 described later.

  Then, the data sort unit 14 sorts the document data of the documents stored in the buffer in the order of the documents including the keywords with the higher priority set.

  The data sorting unit 14 updates the priority of each keyword based on the internal frequency calculated by the internal frequency calculation unit 17 described later and the internal score calculated by the internal score calculation unit 18 described later. The document data of each document is sorted in the order of the document including the keyword with the higher priority.

  When updating the priority of each keyword, the data sorting unit 14 sets a higher priority for a keyword having a higher internal frequency calculated by the internal frequency calculation unit 17 described later. For keywords having the same internal frequency, a higher priority is set for a keyword having a higher internal score calculated by the internal score calculation unit 18 described later.

  In the embodiment of the present invention, the data sorting unit 14 may adopt a configuration in which the internal score calculated by the internal score calculating unit 18 described later is set as the priority of each keyword.

  In the embodiment of the present invention, the data sorting unit 14 extracts data of dates (for example, issuance date) related to each document from each document extracted from the bibliographic data DB 19, and the document data (for example, document The titles, author names, etc.) may be sorted by date in descending or ascending order.

  The display unit 15 displays each document data sorted by the data sorting unit 14 on the screen. The display unit 15 displays each keyword on the same screen as the screen on which each document data is displayed on the screen in descending order of priority. In addition, the display unit 15 displays information indicating whether a document corresponding to each document data displayed on the screen includes each keyword displayed on the screen. The display unit 15 may be configured to display on the screen information indicating how many keywords displayed on the screen correspond to each document data displayed on the screen.

  In addition, for a document including a keyword whose frequency of occurrence in the document group stored in the bibliographic data DB 19 is less than a predetermined threshold, the display unit 15 uses the keyword whose frequency is less than the threshold. It is also possible to adopt a configuration in which information indicating that the information includes a keyword is displayed on a screen in a display area different from a display area where a keyword having a frequency equal to or higher than a predetermined threshold is displayed on the screen.

  The display unit 15 can be configured to delete data other than the data specified by the display data specifying unit 20 described later from the screen after the document data is displayed on the screen. Further, the display unit 15 can adopt a configuration in which data designated by a display data designating unit 20 described later is deleted from the screen after the document data is displayed on the screen.

  The keyword selection unit 16 selects a keyword. The internal frequency calculation unit 17 calculates an internal frequency that is the frequency of each keyword extracted by the keyword extraction unit 11 and appears in the document group including the selected keyword. Here, the internal frequency of each keyword means, for example, the number of documents in which each keyword appears among documents included in a document group including the selected keyword. Further, in the embodiment of the present invention, it is possible to adopt a configuration in which the frequency of appearance of each keyword in the document group including the selected keyword is set as the internal frequency.

  In the embodiment of the present invention, when a plurality of keywords are selected by the keyword selection unit 16, the internal frequency calculation unit 17 determines that each keyword is included in a document group including all of the selected plurality of keywords. You may take the structure which calculates the frequency which appears as an internal frequency.

  The internal score calculation unit 18 calculates the internal score of each keyword based on the internal frequency calculated by the internal frequency calculation unit 17 and the number of characters of each keyword included in the document including the keyword selected by the keyword selection unit 16. To do. The internal score of each keyword is calculated as, for example, a value obtained by multiplying the number of characters of each keyword by the internal frequency.

  In the embodiment of the present invention, the internal score of each keyword may be calculated based on the internal frequency calculated by the internal frequency calculation unit 17 without using the number of characters of each keyword. For example, the internal score calculation unit 18 may employ a configuration for calculating the internal score using the TF / IDF method described above or the Okapi weighting method.

  A large amount of documents (bibliographic data) are stored in the bibliographic data DB 19. The display data designation unit 20 designates data displayed on the screen by the display unit 15.

  The sorting process of the document data of the extracted document by the data sorting unit 14 will be specifically described. As described above, the data sorting unit 14 sorts the document data of each document in the order of the document including the keyword having the higher priority set.

  For example, it is assumed that the document A includes a keyword “Japanese” having the highest priority, a keyword “analysis” having the second priority, and a keyword “information” having the third priority. For example, the document B includes the keyword “Japanese” having the highest priority, the keyword “information” having the third priority, and the keyword “automatic” having the fourth priority. To do. The document A includes a keyword which is not included in the document B and has the second priority. In this case, the document A includes a keyword having a higher priority than the document B.

  The fact that a keyword with a higher priority is included will be described more specifically. For example, when each keyword is arranged in descending order of priority and a document includes a keyword, bit logic “1” is assigned to the keyword, and when a document does not include a keyword, bit logic “0” is assigned to the keyword. Assign. Then, a binary number constituted by the bit logic assigned to each keyword is obtained.

  For example, if keywords are arranged in the order of “Japanese”, “analysis”, “information”, “automatic”,..., The binary number required for the document A is “1110. The number is larger than the binary number “1011...” Required for the document B.

  The fact that a certain document includes a keyword with a higher priority means that, for example, each keyword arranged in descending order of priority is set to each binary digit, and a bit logic is added to the keyword included in the document. “1” means that the binary number formed when bit logic “0” is assigned to a keyword not included in the document is a larger number.

  In addition, the structure of the data display apparatus 1 of this invention is not limited to what is shown in FIG. In the embodiment of the present invention, the data display device 1 can adopt a configuration in which the keyword extraction unit 11 is not used. For example, data in which a document and a keyword included in the document are associated is accumulated in a predetermined database (not shown in FIG. 1), and the frequency calculation unit 12 is obtained from the data accumulated in the database. However, it is also possible to adopt a configuration in which the frequency of each keyword appearing in the document group in the database is calculated.

  In the embodiment of the present invention, for example, documents and keyword data included in the documents are stored in a predetermined database (not shown in FIG. 1), and the data stored in the database is stored. Therefore, it is possible to adopt a configuration in which the frequency calculation unit 12 calculates the frequency of each keyword appearing in the document group in the database.

Below, the keyword extraction method by the keyword extraction part 11 is demonstrated.
(1) Method based on word recognition using morphological analysis First, the keyword extraction unit 11 performs morphological analysis on a document stored in the bibliographic data DB 19 to recognize a word. And the word of a specific noun is taken out as a keyword. For example, only nouns are extracted as keywords. However, general nouns such as “things” and “things” are collected in advance so that these nouns are not extracted as keywords. As keywords, not only nouns but also other parts of speech such as verbs may be taken out.

  For morphological analysis, for example, ChaSen (see the following document (2)), which is a morphological analysis system developed at Nara Institute of Technology, is used.

Reference (2): Morphological analysis system tea bowl (http://chasen.aist-nara.ac.jp/index.html.ja)
ChaSen splits the Japanese sentence and also estimates the part of speech for each word.

  For example, if “go to school” is entered, the following result is obtained.

School Gakkou School Noun-General To He To Particle-Case Particle-General Go Iku Go Verb-Independence
EOS
In this way, each line is divided so that one word is included, and reading and part-of-speech information are given to each word.

  As a part-of-speech tagging system in English, Brill (see reference (3) below) is famous. If this system is used, the part of speech of each word of an English sentence can be estimated.

Reference (3): Eric Brill, Transformation-Based Error-Driven Learning and Natural Language Processing: A Case Study in Part-of-Speech Tagging, Computational Linguistics, Vol. 21, No. 4, p.543-565, 1995.
(2) Method using TF / IDF method etc. For the documents stored in the bibliographic data DB 19, morphological analysis is performed, and for example, only nouns are extracted. Then, for each extracted noun, a predetermined score calculated based on the above-described TF / IDF method is obtained, and the obtained score is greater than a predetermined value or from a score greater than the predetermined value. A keyword that is sequentially extracted by a predetermined number is set as a keyword. Note that the score calculated using the above-described Okapi weighting method may be used.
(3) Method of using existing high-accuracy keyword extraction tools In general, there are many cases where a complex concept is represented by a combination of multiple words in a document. The trend is even more pronounced. Therefore, for example, a complex concept is expressed by a compound word by taking three steps: (a) word division by a morphological analysis program, (b) creation of a compound word, and (c) calculation of importance in a document. Technical terms that are often used can be extracted from the document as keywords.

  For example, the technique described in the following document (4) calculates a score using the number or frequency of words connected to the left and right of a single noun for a single noun extracted from a document, and calculates the left and right scores. In combination, the score of a single noun is calculated. Based on the score of the single noun, the score of the compound noun generated from the single noun is calculated. Then, those having a calculated compound noun score greater than a predetermined value are extracted as keywords. Also in the present invention, it is possible to adopt a configuration in which keywords are extracted using the technique described in Document (4).

Reference (4): Hiroshi Nakagawa, Masanori Mori, Yasuaki Yumoto: "Extraction of technical terms based on appearance frequency and connection frequency", Natural Language Processing, Vol.10 No.1, pp. 27-45, January 2003 In the embodiment of the present invention, the keyword extraction method by the keyword extraction unit 11 is not limited to the three methods described above. The keyword extraction unit 11 can extract keywords using any other keyword extraction method.

  FIG. 2 is a diagram showing an example of a data display processing flow in the embodiment of the present invention. First, the keyword extraction unit 11 extracts keywords included in the document group accumulated in the bibliographic data DB 19 (step S1). For example, the keywords “Japanese”, “analysis”, “information”, “automatic”, “translation”, “expression”, “model”, “extraction”, “method”, “noun”, “summary”, “search” ”,... Are extracted.

  Next, the frequency calculation unit 12 calculates the frequency at which each keyword extracted by the keyword extraction unit 11 appears in the document group stored in the bibliographic data DB 19 (step S2).

  For example, as shown in the table of FIG. 3, the frequency of the calculated keyword “Japanese” is 20, the frequency of the keyword “analysis” is 15, the frequency of the keyword “information” is 12, and the frequency of the keyword “automatic” is 10. The frequency of the keyword “translation” is 9, the frequency of the keyword “expression” is 8, the frequency of the keyword “model” is 7, the frequency of the keyword “extraction” is 7, the frequency of the keyword “method” is 6, and the keyword “noun” The frequency of the keyword “summary” is 4, the frequency of the keyword “search” is 3. The frequency shown in FIG. 3 is the number of documents in which each keyword appears. In FIG. 3, only keywords having a frequency of 3 are shown, but in the embodiment of the present invention, for example, frequency 2 and frequency 1 can also be calculated in step S2.

  Next, the score calculation unit 13 calculates the score of each keyword based on the number of characters of each keyword extracted by the keyword extraction unit 11 and the frequency calculated by the frequency calculation unit 12 (step S3). The score of each keyword is calculated as, for example, a value obtained by multiplying the number of characters of each keyword by the frequency. Note that the number of characters used to calculate the score is, for example, one character. Therefore, for example, for double-byte characters, the number of characters per character is two.

  For example, as shown in the table of FIG. 3, the score of the calculated keyword “Japanese” is 120, which is a value obtained by multiplying the frequency 20 by the number of characters 6. Similarly, the keyword “analysis” score is 60, the keyword “information” score is 48, the keyword “automatic” score is 40, the keyword “translation” score is 36, the keyword “expression” score is 32, the keyword The score of “model” is 42, the score of keyword “extraction” is 28, the score of keyword “method” is 24, the score of keyword “noun” is 20, the score of keyword “summary” is 16, the score of keyword “search” Is 12.

  Next, the data sorting unit 14 extracts the document data of each document accumulated in the bibliographic data DB 19 and stores it in the buffer (step S4). For example, data such as a document title and author name is stored in the buffer as document data.

  Moreover, the data sort part 14 sets the priority of each keyword based on the frequency which the frequency calculation part 12 calculated, and the score which the score calculation part 13 calculated (step S5). The data sorting unit 14 sets a higher priority for keywords with higher frequency. Further, for example, for keywords having the same frequency, the data sorting unit 14 sets a higher priority for a keyword having a higher calculated score.

  Thus, for example, for each keyword shown in the table of FIG. 3, “Japanese”, “analysis”, “information”, “automatic”, “translation”, “expression”, “model”, “extraction”, “extraction”, “ A higher priority is set in the order of keywords such as “method”, “noun”, “summary”, “search”,.

  The data sorting unit 14 sorts the document data of each document in the order of documents including keywords with higher priority (step S6). Then, the display unit 15 displays the document data of each document sorted by the data sorting unit 14 in step S4, and displays each keyword on the screen in descending order of priority (step S7). In the process of step S7, the display unit 15 further displays on the screen information indicating which keywords each document includes.

  As a result of the processing in step S7, for example, a screen as shown in FIG. 4 is displayed. In the screen display example of FIG. 4, document data of documents such as a paper name and an author name are displayed in the order of documents including a keyword having a higher priority. Further, in the screen display example of FIG. 4, keywords surrounded by a rectangular frame are displayed from the left in descending order of priority. The numbers “1”, “2”,... Shown at the left end of the screen in FIG. 4 indicate line numbers, and the numbers “1”, “2” shown at the top of each keyword surrounded by a rectangle in the screen. ", ... indicates a column number.

  For example, a document whose paper name is “A” and whose author name is “a” has a keyword “Japanese” having the highest priority, a keyword “analysis” as the second priority, and a third priority. The keyword “information”, the fourth priority keyword “automatic”, the fifth priority keyword “translation”, and the sixth priority keyword “expression”. And

  Also, for example, a document whose paper name is “B” and whose author name is “b” has a keyword “Japanese” with the highest priority, a keyword “analysis” with the second priority, and a third one. It includes the keyword “information” as the priority, the keyword “automatic” as the fourth priority, and the keyword “translation” as the fifth priority, but the keyword “information” as the sixth priority. It is assumed that “expression” is not included.

  Further, for example, a document whose paper name is “C” and whose author name is “c” has the highest priority keyword “Japanese”, the second priority keyword “analysis”, and the third priority. It is assumed that the keyword “information” as the priority and the keyword “automatic” as the fourth priority are included, but the keyword “expression” as the fifth priority is not included.

  In the embodiment of the present invention, the data of each document is sorted and displayed on the screen in the order of the documents including the keywords with higher priority. In the screen display example of FIG. Document data with a higher degree keyword, paper name “A” and author name “a”, paper data “B” and author name “b”, paper name “C” and author The names are displayed in order of document data “c”.

  As described above, in the process of step S7, information indicating which keywords each document includes is displayed on the screen. For example, as shown in FIG. 4, in the same line as the line on which the document data relating to each document is displayed on the screen, the same word as the keyword enclosed by the rectangular frame included in each document is displayed on the screen. It is displayed on the screen in the same column as the displayed column.

  If it is assumed that the screen shown in FIG. 4 is composed of cells, for example, a row in which document data is arranged, and a column in which keywords surrounded by a rectangular frame included in the document related to the document data are arranged. The same word as the keyword enclosed by the rectangular frame is placed in the cell where and intersect.

  When the screen shown in FIG. 4 is viewed, in the first line where the document data with the paper name “A” and the author name “a” is displayed on the screen, the rectangular data included in the document related to this document data is displayed. The same words as the keywords "Japanese", "Analysis", "Information", "Automatic", "Translation", "Expression" ("Japanese", "Analysis", "Information", " "Auto", "Translation", and "Expression") are displayed on the same column as the column in which each keyword surrounded by a rectangular frame is displayed.

  In the embodiment of the present invention, the information displayed on the display unit 15 indicating which keyword each document includes is not limited to the same word as each keyword displayed on the screen. For example, in the same line as the line where the document data related to each document is displayed on the screen, each keyword enclosed in a rectangular frame included in each document is marked in the same column as the line displayed on the screen You may make it understand which keyword each document contains by displaying on a screen.

  In the embodiment of the present invention, for example, for a document including a keyword related to frequency 2 or frequency 1 calculated in step S2, the same line as the line where the document data related to the document is displayed It is also possible to adopt a configuration in which information indicating that the document includes a keyword related to frequency 2 or frequency 1 is displayed.

  For example, in the screen display example shown in FIG. 4, the keyword “scale” and the frequency 1 related to the frequency 2 are set in the same row as the document data with the paper name “A” and the author name “a”. The keyword “swing” is displayed. Therefore, it can be seen that the document related to the document data having the paper name “A” and the author name “a” includes the keyword “scale” related to frequency 2 and the keyword “shake” related to frequency 1.

  If the screen display shown in FIG. 4 is seen, for example, in a document group including the keyword “Japanese”, in addition to the keyword “Japanese”, there are many documents including keywords such as “analysis” and “information”. I understand. In other words, if the screen display shown in FIG. 4 is viewed, for example, in a document including the keyword “Japanese”, the ratio of keywords such as “analysis” and “information” co-occurring with the keyword “Japanese” appears. You can see at a glance that it is expensive.

  Also, if the screen display shown in FIG. 4 is viewed, for example, a document related to document data whose paper name is “A” and whose author name is “a” is “Japanese”, “analysis”, “information”, “automatic” It can be seen at a glance that the document is related to the keywords “translation” and “expression”.

  Next, the keyword selection unit 16 selects a keyword (step S8). For example, when the keyword “information” surrounded by a rectangular frame is left-clicked on the screen shown in FIG. 4, the keyword “information” is selected by the keyword selection unit 16.

  The internal frequency calculation unit 17 calculates the internal frequency (step S9). For example, among the documents included in the document group including the keyword selected by the keyword selection unit 16, the number of documents in which each keyword extracted by the keyword extraction unit 11 in step S1 appears is calculated as the internal frequency.

  For example, referring to the screen shown in FIG. 4, in the document group consisting of 12 documents including the selected keyword “information”, the frequency that the keyword “information” appears is 12 and the frequency that the keyword “analysis” appears is 10. Therefore, for example, as shown in the table of FIG. 5, the internal frequency of the keyword “information” is 12, and the internal frequency of the keyword “analysis” is 10.

  Similarly, as shown in the table of FIG. 5, for example, the internal frequency of the keyword “automatic” is 8, the internal frequency of the keyword “Japanese” is 7, the internal frequency of the keyword “expression” is 6, and the keyword “translation”. The internal frequency of the keyword “model” is 4, the internal frequency of the keyword “extract” is 4, the internal frequency of the keyword “method” is 3, the internal frequency of the keyword “noun” is 2, and the keyword “summary” Has an internal frequency of 2, the keyword “search” has an internal frequency of 1,.

  The internal score calculation unit 18 calculates the internal score of each keyword based on the internal frequency calculated by the internal frequency calculation unit 17 and the number of characters of each keyword (step S10). For example, the internal score calculation unit 18 calculates the internal score of each keyword by multiplying the number of characters of each keyword by the internal frequency. Note that the number of characters used to calculate the internal score is, for example, one half-width character. Therefore, for example, for double-byte characters, the number of characters per character is two.

  For example, as shown in the table of FIG. 5, the calculated internal score of the keyword “information” is 48, which is a value obtained by multiplying the internal frequency 12 by the number of characters 4. Similarly, the internal score of the keyword “analysis” is 40, the internal score of the keyword “automatic” is 32, the internal score of the keyword “Japanese” is 42, the internal score of the keyword “expression” is 24, and the keyword “translation” is The internal score is 20, the internal score of the keyword “model” is 24, the internal score of the keyword “extraction” is 16, the internal score of the keyword “method” is 12, the internal score of the keyword “noun” is 8, and the keyword “summary” The internal score is 8, and the internal score of the keyword “search” is 4.

  The data sorting unit 14 sets the priority of each keyword based on the internal frequency calculated by the internal frequency calculation unit 17 and the internal score calculated by the internal score calculation unit 18 (step S11). The priority set in step S5 is updated by the process in step S11. The data sorting unit 14 sets a higher priority for a keyword having a higher internal frequency. Further, the data sorting unit 14 sets a higher priority for keywords having the same internal frequency as the calculated internal score is higher.

  Thus, for example, for each keyword shown in the table of FIG. 5, “information”, “analysis”, “automatic”, “Japanese”, “expression”, “translation”, “model”, “extraction”, “extraction”, “ High priority is set in the order of keywords such as “method”, “noun”, “summary”, “search”,.

  Then, the data sorting unit 14 sorts the document data stored in the buffer in step S4 in the order of the document including the keyword having the higher priority set in step S11 (step S12).

  Returning to step S7, the display unit 15 displays the document data of each document sorted by the data sorting unit 14 on the screen and displays the keywords on the screen in descending order of priority (step S7).

  For example, a screen as shown in FIG. 6 is displayed. Here, for example, a document whose paper name is “A” and whose author name is “a” has a keyword “information” with the highest priority, a keyword “analysis” with the second priority, and a third one. The keyword “automatic” as the priority, the keyword “Japanese” as the fourth priority, the keyword “expression” as the fifth priority, and the keyword “translation” as the sixth priority. Suppose that it contains the most keywords with higher priority.

  Also, for example, a document whose paper name is “B” and whose author name is “b” has the highest priority keyword “information”, the second priority keyword “analysis”, and the third priority. A keyword “automatic” that is a degree, a keyword “Japanese” that is a fourth priority, a keyword “translation” that is a sixth priority, and a keyword “summary” that is an eleventh priority. However, it is assumed that the keyword “expression” which is the fifth priority is not included.

  Further, for example, a document whose paper name is “C” and whose author name is “c” has the highest priority keyword “information”, the second priority keyword “analysis”, and the third priority. A keyword “automatic” that is the second priority and a keyword “Japanese” that is the fourth priority, but the keyword “expression” that is the fifth priority and the keyword “expression” that is the sixth priority. "Translation" is not included.

  Also, for example, a document whose paper name is “U” and whose author name is “u” has the highest priority keyword “information”, the second priority keyword “analysis”, and the third priority. Keyword “automatic”, fifth priority keyword “expression”, sixth priority keyword “translation”, seventh priority keyword “model”, and eighth priority Including the keyword “extraction” that is the priority of the keyword, the keyword “noun” that is the tenth priority, and the keyword “summary” that is the eleventh priority, but the keyword that is the fourth priority “Japanese” is not included.

  In the embodiment of the present invention, the data of each document is sorted and displayed on the screen in the order of the documents including the keywords with higher priority. In the screen display example of FIG. Document data with name “A” and author name “a”, document data with paper name “B” and author name “b”, document data with paper name “C” and author name “c”, The paper names are displayed in the order of document data with the name “U” and the author name “u”.

  Further, for example, as shown in the screen display example of FIG. 6, the same word as each keyword enclosed in a rectangular frame included in each document in the same line as the line in which the document data relating to each document is displayed. However, each keyword is displayed in the same column as that displayed on the screen.

  Looking at the screen display shown in FIG. 6, for example, in the document group including the selected keyword “information”, in addition to the keyword “information”, there are many documents including keywords such as “analysis” and “automatic”. You can see at a glance. In other words, if the screen display shown in FIG. 6 is viewed, for example, in a document including the keyword “information”, a keyword such as “analysis” or “automatic” is likely to appear together with the keyword “information”. Can be seen at a glance.

  The data display processing flow in the present invention is not limited to the processing flow shown in FIG. For example, immediately after step S7 in FIG. 2, the display data specifying unit 20 performs a process of specifying data displayed on the screen as display data, and the display unit 15 displays data other than the specified display data on the screen. You may perform the process to erase.

  For example, in the screen display shown in FIG. 4, when the user designates an arbitrary keyword surrounded by a rectangular frame (for example, right click), the display data designation unit 20 retrieves document data of a document including the designated keyword. Designated as a part of the display data, the display unit 15 erases the document data of the document other than the document including the designated keyword on the screen. In the above description, “part of display data” means that the display data designating unit 20 specifies a keyword enclosed in each rectangular frame, in addition to the document data of the document including the designated keyword. This is because it is possible to adopt a configuration in which information indicating which keywords enclosed in a rectangular frame are included as display data in a document including the keywords.

  Further, for example, when the user designates an arbitrary keyword surrounded by a rectangular frame (for example, right click etc.) in the screen display shown in FIG. 4, the display data designating unit 20 selects a document other than the document containing the designated keyword. The document data of the document is designated as a part of the display data, and the display unit 15 erases the document data of the document including the designated keyword on the screen.

  In the embodiment of the present invention, for example, in the screen display shown in FIG. 4 or FIG. 6, when the user designates an arbitrary keyword surrounded by a rectangular frame (for example, right click), display data designation is performed. The unit 20 uses, as part of the display data, data (for example, information indicating which keywords each document includes) that are displayed in the same column as the column in which keywords other than the designated keyword are displayed on the screen. The display unit 15 erases the data displayed in the same column as the column in which the specified keyword is displayed on the screen.

  In the embodiment of the present invention, in the above example, when the same keyword is designated again, the display unit 15 displays the data about the column in which the designated keyword is displayed on the screen once erased. A configuration may be adopted in which the screen is displayed again.

  In the embodiment of the present invention, for example, in the screen display shown in FIG. 4 or FIG. 6, the user designates document data (for example, data on each paper name or author name) (for example, right click etc.) Then, the display data designating unit 20 displays data (for example, information indicating which keyword each document includes) that is displayed on the same line as the line on which the document data other than the designated document data is displayed on the screen. ) Is specified as part of the display data, and the display unit 15 erases the data displayed on the same line as the line on which the specified document data is displayed on the screen.

  In the embodiment of the present invention, in the above example, when the same document data is designated again, the display unit 15 deletes the line for which the designated document data is displayed on the screen once erased. A configuration may be adopted in which data is redisplayed on the screen.

  The present invention can also be applied to information retrieval results of web documents. For example, when a user designates a keyword from an arbitrary web site and retrieves a document group including the keyword (designated keyword), the data display device 1 of the present invention is included in the retrieved document group. A plurality of keywords may be extracted and the process shown in each step of FIG. 2 may be performed. In the application example to the information retrieval result of the web document of the present invention, among the keywords displayed on the screen by the data display device 1, the same keyword as the designated keyword designated by the user at the time of information retrieval is designated as the designated keyword. It is also possible to adopt a configuration in which information indicating the same keyword is displayed on the same screen.

  The present invention can also be implemented as a program that is read and executed by a computer. The program for realizing the present invention can be stored in an appropriate recording medium such as a portable medium memory, a semiconductor memory, or a hard disk, which can be read by a computer, provided by being recorded on these recording media, or communication. It is provided by transmission / reception using a network via an interface.

It is a figure which shows an example of the system configuration | structure of this invention. It is a figure which shows an example of the data display processing flow in embodiment of this invention. It is a figure which shows the example of the frequency and score of each keyword. It is a figure which shows the example of a screen display. It is a figure which shows the example of the internal frequency and internal score of each keyword. It is a figure which shows the example of a screen display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Data display apparatus 11 Keyword extraction part 12 Frequency calculation part 13 Score calculation part 14 Data sort part 15 Display part 16 Keyword selection part 17 Internal frequency calculation part 18 Internal score calculation part 19 Bibliographic data DB
20 Display data specification part

Claims (11)

A data display device,
A keyword extracting means for extracting a keyword included in a document group composed of a plurality of documents;
A frequency calculating means for calculating a frequency at which each of the extracted keywords appears in the document group;
Score calculating means for calculating a score of each keyword based on the calculated frequency;
A data sorting means for setting the calculated score as a priority of each keyword, and sorting document data of documents constituting the document group in the order of documents including a keyword having a higher set priority;
Display means for displaying the sorted document data as display data on the screen, and displaying the keywords on the same screen as the screen on which the document data is displayed on the screen as the display data in the order of priority. Prepared,
The display means further displays, on the screen, information indicating whether a document corresponding to each document data displayed on the screen includes each keyword displayed on the screen as display data. A data display device,
A frequency calculating means for calculating a frequency of occurrence of each keyword in the document group based on the input document in the document group and a keyword included in each document;
Score calculating means for calculating a score of each keyword based on the calculated frequency;
A data sorting means for setting the calculated score as a priority of each keyword, and sorting document data of documents constituting the document group in the order of documents including a keyword having a higher set priority;
Display means for displaying the sorted document data as display data on the screen, and displaying the keywords on the same screen as the screen on which the document data is displayed on the screen as the display data in the order of priority. Prepared,
The display means further displays, on the screen, information indicating whether a document corresponding to each document data displayed on the screen includes each keyword displayed on the screen as display data. The data display device according to claim 1, further comprising:
Keyword selection means for selecting keywords,
An internal frequency calculating means for calculating an internal frequency that is a frequency of occurrence of each keyword extracted by the keyword extracting means in a document group including the selected keyword;
Internal score calculation means for calculating an internal score of each keyword based on the internal frequency calculated by the internal frequency calculation means,
The data sorting means sets the calculated internal score as the priority of each keyword, and sets the document data of the documents constituting the document group in the order of documents including the keyword with the higher priority set. A data display device characterized by sorting. The data display device according to claim 3, further comprising:
The internal frequency calculation means, when a plurality of keywords are selected by the keyword selection means, appears in a document group including all of the selected keywords for each keyword extracted by the keyword extraction means. A data display device characterized in that a frequency of performing the calculation is calculated as the internal frequency. In the data display device according to claim 3 or 4,
The score calculation means calculates the score of each keyword based on the number of characters of each keyword extracted by the keyword extraction means and the frequency calculated by the frequency calculation means,
The data sorting means sets the priority of each keyword based on the frequency calculated by the frequency calculating means and the score calculated by the score calculating means, and the internal data calculated by the internal frequency calculating means Based on the frequency and the internal score calculated by the internal score calculation means, the priority of each keyword is updated, and the documents that constitute the document group in the order of the document including the updated higher priority keyword A data display device characterized by sorting data. The data display device according to any one of claims 1 to 5,
The data display apparatus characterized in that the display means displays on a screen as information display information indicating how many keywords displayed on the screen a document corresponding to each document data displayed on the screen includes. The data display device according to any one of claims 1 to 6,
For the document including a keyword whose frequency calculated by the frequency calculating unit is less than a predetermined threshold, the display unit includes information indicating that the document includes a keyword whose frequency is less than the threshold. A data display device, wherein a keyword whose frequency is equal to or higher than a predetermined threshold is displayed on the screen as display data in a display area different from a display area for displaying the keyword. The data display device according to any one of claims 1 to 7, further comprising:
Comprising display data designating means for designating display data displayed on the screen by the display means;
The display means displays only the display data designated by the display data designation means on the screen. The data display device according to any one of claims 1 to 8,
The data display device, wherein the data sorting unit sorts document data of documents constituting the document group in descending order or ascending order with respect to dates related to each document. A data display method,
Extracting a keyword contained in a document group composed of a plurality of documents;
Calculating the frequency of each of the extracted keywords appearing in the document group;
Calculating a score for each keyword based on the calculated frequency;
Setting the calculated score as the priority of each keyword, and sorting the document data of the documents constituting the document group in the order of the document including the keyword with the higher priority set;
Displaying the sorted document data on the screen as display data, and displaying the keywords on the same screen as the screen on which the document data is displayed on the screen as display data in order of the priority;
And a step of displaying, as display data, information indicating whether a document corresponding to each document data displayed on the screen includes each keyword displayed on the screen. A program for causing a computer included in the data display device to execute the program,
The computer,
A keyword extracting means for extracting a keyword included in a document group composed of a plurality of documents;
A frequency calculating means for calculating a frequency at which each of the extracted keywords appears in the document group;
Score calculating means for calculating a score of each keyword based on the calculated frequency;
A data sorting means for setting the calculated score as a priority of each keyword, and sorting document data of documents constituting the document group in the order of documents including a keyword having a higher set priority;
Function as display means for displaying the sorted document data on the screen as display data and displaying the keywords on the same screen as the screen on which the document data is displayed on the screen as the display data in descending order of priority. A program for
The data display program characterized in that the display means further displays on the screen as display data information indicating whether a document corresponding to each document data displayed on the screen includes each keyword displayed on the screen.

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