JP2010170324A - Apparatus for supporting knowledge sharing, and method and program thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To promote sharing of knowledge about topics among a plurality of users. <P>SOLUTION: An apparatus for supporting knowledge sharing includes: a message selecting unit 103 for selecting, from a message database 102, message information about topics to be accumulated as document information in a document database 108; a first extraction unit 105 for extracting a first keyword whose frequency of appearance in the latest first period is not less than a reference value from the message information selected; a second extraction unit 106 for extracting a second keyword whose frequency of appearance in a second period prior to the first period is not less than a reference value from the message information selected; a search unit 109 for searching the document database 108 for first document information whose search scores with respect to the message information from which the first keyword has been extracted are not less than a threshold value; a determining unit 110 for determining whether or not the second document information associated with the message information containing the second keyword is in the document database 108; and a presentation unit 111 for presenting the first and second keywords so as to identify whether or not there is the first document information and the second document information. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a knowledge sharing support apparatus, a method and a program for accumulating knowledge about topics in message exchange between a plurality of users in a database and supporting the sharing.

  There is a document retrieval system as one of systems that accumulate and support the sharing of knowledge in an organization. The document retrieval system is a system that enables retrieval of document information stored in a document database using retrieval queries such as keywords and natural sentences. If the results of activities in the organization and various reports are stored in the document database, the necessary document information can be searched and referenced.

  By the way, the document information stored in the document database as described above is called stock information as information that is stored (stocked) and managed. On the other hand, ad hoc information such as e-mail and messages on an electronic bulletin board is called flow information. Document retrieval systems target stock information, but not all the necessary information is included. For example, when referring to a design specification of a certain product, the circumstances for determining a specific item are not described, and only the conclusion is often described. If there is a discussion on the topic of design using e-mail or electronic bulletin board, information about such circumstances will exist as flow information, but the flow is scattered independently of stock information. It is difficult to access information related to a specific item from the information.

  With this background, knowledge management support systems that manage flow information and stock information in association with each other have appeared. Both the electronic bulletin board and the document database are included as components, and when the document information as stock information is registered in the document database, the communication (message group) performed between the parties involved before the document information is created. To manage in relation to. By this association, for example, it becomes possible to easily refer to the flow information regarding the discussion whose contents are determined from the design specification.

  In such a knowledge management support system, not only deliverables such as design specifications that have been obliged to be created in advance, but also document information that summarizes and summarizes the content of discussions held on electronic bulletin boards. It is useful for efficient sharing of knowledge within the organization (see, for example, Patent Document 1). Here, such document information is referred to as “summary”. By accumulating the results of the discussion as a “summary”, the knowledge buried in the flow information can be written and referenced.

JP 2006-155330 A

  However, in order to create stock information such as the above-mentioned “summary”, it is necessary for the user himself to arrange and summarize the content related to the topic of discussion again, which takes a certain amount of time. Therefore, there is a problem that “summary” is not actively created except for users who are highly conscious about knowledge sharing.

  In addition, users who are highly conscious about sharing knowledge or users in a position called knowledge managers who are tasked with promoting knowledge sharing monitor the discussions of others and discuss what should be stored as stock information. In such a case, the creation of the “summary” can be promoted by encouraging the people involved in the creation of the “summary”. However, it is not practical for knowledge managers and the like to monitor all discussions one by one, which is very expensive.

  The present invention has been made paying attention to the above circumstances, and its object is to provide a knowledge sharing support apparatus and method capable of promoting the sharing of knowledge related to topics in message exchange between a plurality of users, and a method therefor To provide a program.

  In order to achieve the above object, one aspect of the present invention is an apparatus for supporting knowledge sharing on a topic, a message storage unit that stores a plurality of message information exchanged between a plurality of users, and the message information A document storage unit that stores document information in association with the message storage unit, a selection unit that selects message information related to a topic to be stored as the document information in the document storage unit from the message storage unit, and A first extraction unit that extracts a first keyword whose appearance frequency in the most recent first period is greater than or equal to a reference value among the selected message information; and a second period before the first period of the selected message information. A second extraction unit that extracts a second keyword having an appearance frequency equal to or higher than a reference value; message information from which the first keyword is extracted from the document storage unit; A determination unit that searches for first document information whose search score is greater than or equal to a threshold, and whether or not there is second document information associated with message information including the second keyword in the document storage unit A first presentation unit that presents the first keyword so that the presence or absence of the first document information in the document storage unit can be identified, and a presence or absence of the second document information in the document storage unit There is provided a knowledge sharing support device comprising a second presentation unit for presenting the second keyword.

  Another aspect of the present invention is a method used in an apparatus that supports sharing of knowledge about a topic, a step of storing a plurality of message information exchanged between a plurality of users, and a document associated with the message information A step of storing information, a step of selecting message information relating to a topic to be stored as the document information in the document storage unit among the plurality of message information, and a first period of the most recent of the selected message information Extracting a first keyword having an appearance frequency equal to or higher than a reference value; extracting a second keyword having an appearance frequency equal to or higher than a reference value in the second period before the first period from the selected message information; Search for first document information whose search score between the document storage unit and the message information from which the first keyword is extracted is greater than or equal to a threshold value Determining whether there is second document information associated with message information including the second keyword in the document storage unit, and whether the first document information is in the document storage unit. Provided is a knowledge sharing support method comprising the steps of presenting the first keyword so that it can be identified, and presenting the second keyword so that the presence or absence of the second document information in the document storage unit can be identified. .

  According to another aspect of the present invention, there is provided a program for controlling an apparatus that supports sharing of knowledge related to a topic, a process for storing a plurality of message information exchanged between a plurality of users in a computer, and message information Storing the document information in association with each other, processing for selecting message information related to the topic to be stored as the document information in the document storage unit from among the plurality of message information, and the most recent of the selected message information Extracting a first keyword whose appearance frequency in the first period is equal to or higher than a reference value, and selecting a second keyword whose appearance frequency in the second period before the first period is equal to or higher than a reference value among the selected message information The first document information whose search score between the extracting process and the message information from which the first keyword is extracted from the document storage unit is a threshold value or more A process of searching, a process of determining whether or not there is second document information associated with message information including the second keyword in the document storage unit, and presence or absence of the first document information in the document storage unit Providing a knowledge sharing support program that executes a process of presenting the first keyword so that the document can be identified and a process of presenting the second keyword so that the presence or absence of the second document information in the document storage unit can be identified To do.

  Therefore, according to the present invention, it is possible to provide a knowledge sharing support apparatus, a method and a program thereof that can promote sharing of knowledge related to topics in message exchange between a plurality of users.

1 is a functional block diagram showing a knowledge sharing support apparatus according to a first embodiment of the present invention. The figure which shows an example of the format of the message information stored in a message database. The figure which shows an example of the interface for document information registration. The figure which shows an example of the format of the document information stored in a document database. The flowchart which shows the procedure of a message selection process. The figure which shows an example of the knowledge for message selection. The flowchart which shows the procedure of a keyword extraction process. The flowchart which shows the procedure of a related document search process. The flowchart which shows the procedure of corresponding document determination processing. The figure which shows the example of a keyword presentation. The functional block diagram which shows the knowledge sharing assistance apparatus which concerns on 2nd Embodiment of this invention. The figure which shows an example of a 1st pull-down menu. The figure which shows the example of presentation of a 1st document title list. The figure which shows an example of a 2nd pull-down menu.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
In this embodiment, document information is created to efficiently convey knowledge about the topic under discussion, such as by summarizing a series of messages exchanged between multiple users via e-mail or electronic bulletin board. By accumulating it, we are promoting the sharing of knowledge.

  FIG. 1 is a functional block diagram of a knowledge sharing support apparatus according to the first embodiment of the present invention. This knowledge sharing support apparatus can be realized on a computer that includes a CPU, a memory, and a disk device and is connected to a network. For example, the message reception unit 101, the message selection unit 103, the first keyword extraction unit 105, the second keyword extraction unit 106, the document registration unit 107, the related document search unit 109, the corresponding document determination unit 110, and the keyword presentation unit 111 are the CPU. It is realized as a program executed on a memory. The message database (message DB) 102, the message identification knowledge 104, and the document database (document DB) 108 are configured as data in the disk device.

  The message receiving unit 101 receives message information exchanged between a plurality of users through the network, and stores the contents in the message DB 102.

  Based on the message selection knowledge 104, the message selection unit 103 selects message information related to a topic to be accumulated as document information in the document DB 108 from message information stored in the message DB 102.

  The first keyword extraction unit 105 extracts a keyword (hereinafter referred to as a first keyword) whose appearance frequency has recently increased rapidly for the message information selected by the message selection unit 103. That is, the first keyword represents the topic currently being discussed.

  The second keyword extraction unit 106 extracts a keyword (hereinafter referred to as a second keyword) whose appearance frequency has rapidly increased in the past for the message information selected by the message selection unit 103. That is, the second keyword represents a topic that has already been discussed.

  The document registration unit 107 summarizes the contents of a series of messages exchanged between a plurality of users based on the message DB 102 or classifies the document information created by classifying the contents according to predetermined items. It is registered in the document DB 108 through an input device such as a keyboard according to user designation.

  The related document search unit 109 has document scores with a search score between the first keyword extraction unit 104 extracted by the first keyword extraction unit 104 and a threshold value or higher (hereinafter referred to as first document information). Is retrieved from the document DB 107.

  Corresponding document determination unit 110 determines whether or not document information (hereinafter referred to as second document information) associated with message information including the second keyword extracted by second keyword extraction unit 105 exists in document DB 107. Determine whether.

  The keyword presenting unit 111 has a format that can identify the presence or absence of the first document information in the document DB 107 for the first keyword, and a format that can identify the presence or absence of the second document information in the document DB 107 for the second keyword. To present to the user.

  In the present embodiment, for example, the keyword presentation unit 111 is activated in accordance with a request from the user, and the message selection unit 103, the first keyword extraction unit 105, the second keyword extraction unit 106, the related document search unit 109, and The corresponding document determination unit 110 is called as necessary, and the resulting first and second keywords are presented on a display device such as a display. Further, the message selection unit 103, the first keyword extraction unit 105, the second keyword extraction unit 106, the related document search unit 109, and the corresponding document determination unit 110 are activated at regular intervals, and the results are stored in the disk device. The keyword presenting unit 111 activated based on the user's request may present the first and second keywords based on the result stored last in the disk device.

FIG. 2 shows an example of the format of message information stored in the message DB 102 by the message receiving unit 101.
The message ID 201 is identifier information for identifying each message, the group ID 202 is identifier information for identifying the group to which the message belongs, the reception date and time 203 is the date and time information when the message is received, and the caller ID 204 is the user who sent the message Identifier 205, subject 205 is text information representing the subject of the message, and body 206 is text information corresponding to the body of the message.

  In addition to a specific individual, the user who sent the message may be a community in which the message is registered in the case of an electronic bulletin board. Further, the group identifier 202 makes it possible to identify, for example, a group of messages related to a reply relationship (called a thread in an electronic mail or electronic bulletin board). This refers to the message related to the reply of the received message, acquires the message information of the reply source from the message DB 102 based on the message ID of the reply source, and receives the same identifier information as the group ID assigned thereto This can be easily realized by assigning as a group ID. When a message that does not have a reply relationship is received, new identifier information that does not overlap with the previous group ID may be given as the group ID. In the case of an electronic bulletin board, a group of messages belonging to the same community may be identified by a group ID. In that case, identification information of the group ID may be given for each community to which the message is posted. Hereinafter, for convenience, a group of messages with the same group ID is expressed as a message group.

  FIG. 3 shows an example of a user interface configured to create document information to be registered by the document registration unit 107. Reference numeral 301 denotes an area for displaying a list of messages in the message DB 104, and reference numeral 302 denotes an area for inputting document information. Reference numeral 303 denotes a message subject, and reference numeral 304 denotes a check box for selecting a message. The message list is displayed in units of message groups related in a reply relationship, and the subject of the first message is presented in 303. Messages are selected in units of message groups, and the user can select multiple message groups. A scroll bar 305 is used to select a message range to be displayed in the area 301. When a text is input in 302 and a registration button 306 is pressed, the document registration unit 107 registers the contents in the document DB 108 as document information associated with the message in the message group selected in the area 301.

  The document DB 108 holds document information in the format shown in FIG. 4, for example. A document ID 401 is an identifier for identifying individual document information. The group ID 402 is the same as the group ID 202 of FIG. 2, and stores the identifier information of the message group to which the document is related. The title 403 is text information expressing the title of the document, and the user may input the document information through the registration interface illustrated in FIG. 3 at the time of registration, or the title portion of the document information or the head of the document information. A certain character string may be acquired and stored. A document main body 404 is a main body of document information, and is stored in a format capable of acquiring text information of document contents.

Next, the operation of the knowledge sharing support apparatus configured as described above will be described.
(Message selection process)
The message sorting unit 103 sorts messages to be processed by the first keyword extraction unit 105 and the second keyword extraction unit 106 in the subsequent stage in units of a set of messages assigned the same group ID.

  This message selection process is performed based on the importance calculated by the flowchart shown in FIG. The message sorting unit 103 sorts the first and second keyword extraction target message information if the calculated importance is greater than a predetermined reference value.

  In FIG. 5, the message selection unit 103 acquires an unprocessed message group having the same group ID from the message DB 102 (step 501). If no unprocessed message remains, the processing of the message selection unit 103 ends. Next, the message selection unit 103 divides the text information of the subject 205 and body 206 of each acquired message information into words by morphological analysis, and gives part-of-speech information for each word (step 502). Since morphological analysis is a general technique as a base for natural language processing, detailed description thereof is omitted. The message selection unit 103 calculates the importance of the message group based on the result of the morphological analysis and the collation result of the message selection knowledge 104 (step 503).

  The message selection knowledge 104 is an enumeration of pairs of morpheme sequence patterns expressed by word and part-of-speech sequences and their scores. An example is shown in FIG. In the morpheme sequence pattern of FIG. 6, the word delimiter is “/”, and the part of speech information surrounded by “<” and “>” is written after each word. FIG. 6 exemplifies a part of message selection knowledge when a topic to be accumulated is used for troubleshooting. By selecting messages based on such knowledge, for example, messages that do not include knowledge that should be shared in the organization, such as a conference notification, can be excluded.

  In step 503, if a portion that matches the pattern described in the message selection knowledge 104 is included in the result of the morpheme analysis in step 502, the score associated with the morpheme sequence pattern is added as the importance. After completion of collation of all patterns described in the message selection knowledge 104, the score addition result is divided by the number of messages in the processed message group to normalize the importance. The message selection unit 103 passes the message group having the calculated importance level larger than a predetermined reference value to the subsequent keyword extraction process.

(First keyword extraction process)
The first keyword extraction unit 105 targets message information belonging to a message group in which the number of messages received within a certain period from the current time is more than a predetermined number among the messages selected by the message selection unit 103. The process shown in FIG. 7 is executed.

  First, the first keyword extraction unit 105 divides the text information of the subject 205 and the body text 206 included in the message information into words, and gives parts of speech as in the case of the morphological analysis in step 502 (step 701).

  Next, the first keyword extraction unit 105 extracts the first keyword from the message information based on the following (1) and (2) (step 702).

(1) A character string matching a keyword character string in a keyword table (not shown) described in advance (2) A C-value (described later) of the morpheme sequence obtained in step 701 is calculated, and the value is A fixed number of morpheme sequences in descending order. Here, C-value is a value used when extracting a compound word from a sequence of words, and is calculated by the following equation.

CN: Morphological sequence
length (CN): CN length (morpheme number)
n (CN): Number of times CN appears in the document set
t (CN): The number of appearances of a longer morpheme sequence including CN
c (CN): Different number of longer morpheme sequences including CN In addition to (1) and (2) above, a list of unnecessary words is created in advance, and in step 702, keywords included in the unnecessary word list are extracted. You may control so that it may not.

  For example, the first keyword extraction unit 105 assigns and outputs the message ID of the extraction source to the first keyword as follows.

Keyword 1: Message ID 11, Message ID 12, ...
Keyword 1 is a keyword extracted by the first keyword extraction unit 105, and message ID 11, message ID 12,... Are extraction source message IDs.

(Second keyword extraction process)
The second keyword extracting unit 106 uses the predetermined number of messages N as a reference for the most recent predetermined period T1 and the period T2 before the period T1 among the message information selected by the message selecting unit 103. Message information belonging to a message group that satisfies the following conditions 1 and 2 is targeted.

Condition 1: Number of messages is less than N in period T1 Condition 2: Number of messages is greater than or equal to N in period T2 The second keyword extraction unit 106 uses the first keyword shown in FIG. The second keyword is extracted in the same manner as the processing of the keyword extracting unit 105, and the second keyword is output in the same output format as that of the first keyword extracting unit 105.

(Related document search processing)
The related document search unit 109 searches the document DB 108 for document information related to the message in which the first keyword appears for the first keyword output from the first keyword extraction unit 105. FIG. 8 is a flowchart showing a procedure of related document search processing.
The related document search unit 109 acquires the subject 205 and the text 206 included in the message information in which the first keyword appears based on the message ID given to the first keyword, and creates a search question (step 801). The text of the subject 205 and the text 206 may be divided into sentences using clues or the like as clues, and if the same sentence is already included in the search question, processing may be performed in which the sentence is not added to the search question. Further, the message information may be added to the search question from the newest reception date and time, and when the search question exceeds a certain number of characters, the search question creation processing in step 801 may be terminated there.

  The related document search unit 109 divides the character string of the search question created in step 801 into words by morphological analysis, and uses a word determined as a predetermined part of speech as a search word from those words. Extract (step 802).

Further, the related document search unit 109 calculates the search score of each document stored in the document DB 108 based on the following expression of the tf / idf model using the search word extracted in step 802 (step 803). ).

Sd: Search score of document d (relative value)
Sd ': search score of document d (absolute value)
Smax: Maximum search score
tfi: appearance frequency of the search term i in the document d
tfmax: Maximum appearance frequency in document d
N: In the document DB 108
dfi: number of appearance documents of search term i
δ: if tfi> 0 then 1 else 0
The related document search unit 109 uses a search score document of a certain value or more among the search scores calculated in this way as a keyword related document (first document) output by the first keyword extraction unit 105. Output in the following format in association with keywords.
1st keyword 1: 1st document ID11, 1st document ID12, ...
On the other hand, if there is no document with a search score greater than a certain value, only the keyword is output.

First keyword 2:
(Corresponding document judgment processing)
The corresponding document determination unit 110 acquires, for the second keyword output from the second keyword extraction unit 106, document information related to the message in which the second keyword appears from the document DB 108. FIG. 9 is a flowchart showing the procedure of the corresponding document determination process.

  The corresponding document determination unit 110 refers to the message information of the extraction source in the message DB 102 based on the message ID assigned to the second keyword, and acquires the group ID list of the message group to which they belong ( Step 901).

  The corresponding document determination unit 110 determines whether or not the document DB 108 has document information to which the group ID acquired in step 901 has been assigned, that is, associated with the message group (step 902). ).

  When the corresponding document determination unit 110 can acquire such a document (second document), the corresponding document determination unit 110 acquires the second keyword output by the second keyword extraction unit 106 in the same output format as the related document search unit 109. Output documents in association with each other.

(Keyword presentation process)
The keyword presentation unit 111 presents the first keyword output from the first keyword extraction unit 105 and the second keyword output from the second keyword extraction unit 106 to the user through a display device such as a display.

  FIG. 10 shows an example of keyword presentation by the keyword presentation unit 111. Here, the presentation format of the first and second keywords is based on the following conditions, for example.

  (1) The first and second keywords determine the size to be presented based on the number of associated messages. Specifically, a correspondence table between the range of the number of messages and the size to be presented is prepared in advance, and the size to be presented is determined based on this table.

  (2) For the first keyword, only the keyword for which the first document information is searched in the related document search unit 109 is presented with an underline.

  (3) The second keyword is presented in italics to distinguish it from the first keyword.

  (4) As for the second keyword, only the keyword determined by the corresponding document determination unit 110 as having the second document information is presented with an underline.

  In addition, the first keyword output by the first keyword extraction unit 105 and the second keyword extracted by the second keyword extraction unit 106 may be presented in different colors. Note that the present embodiment is not limited to keyword presentation in the above format, and includes any format that can identify the following types of keywords.

(1) For the first keyword extracted by the first keyword extraction unit 105, whether or not the related document search unit 109 has been able to search for a document related to the keyword.
(2) For the second keyword extracted by the second keyword extraction unit 106, whether or not the corresponding document determination unit 110 has been able to acquire a document related to the message in which the keyword appears.
(3) About the first and second keywords, the size of the topic based on the number of received messages Note that, here, an example in which the keyword presentation unit 111 presents the first keyword and the second keyword at the same time has been shown. For example, the first keyword and the second keyword can be presented in separate windows in a format according to the above conditions using a multi-window system.

  As described above, according to the first embodiment, for the topic currently being discussed through the exchange of messages on e-mails and electronic bulletin boards, the presence or absence of document information related to the keyword can be identified as the first keyword. Therefore, knowledge that can be helpful during the discussion can be easily obtained. Also, for topics after the discussion is over, the second keyword is presented so that the presence or absence of document information associated with the message information containing the keyword can be identified. You can easily grasp what has not been done.

(Second Embodiment)
FIG. 11 shows functional blocks of a knowledge sharing support apparatus according to the second embodiment of the present invention. FIG. 11 is obtained by adding a document information reference unit 1101, a document information notification unit 1102, and a document information creation request unit 1103 to the configuration shown in FIG. 1 in the first embodiment. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The document information reference unit 1101 is an underlined non-italicized keyword presented by the keyword presenting unit 111 (the first keyword extracted by the first keyword extracting unit 105 and related to the keyword by the related document search unit 109. The first document information related to the first keyword specified by the user is presented. The document information reference unit 1101 includes a keyword specifying unit (not shown) that accepts specification of a keyword of interest by the user, and a document presenting unit (not shown) that presents a list of first documents related to the specified keyword. And.

  The keyword specifying unit is, for example, an input device such as a mouse that accepts keyword specification. When the user moves the pointer to the position of the specific first keyword on the display device and performs a click operation, as shown in FIG. The first pull-down menu 1201 is displayed. The first pull-down menu 1201 has items of “message list” and “document list”.

  When the user selects “message list” in the first pull-down menu 1201, the document information reference unit 1101 can refer to a list of message information in which the first keyword appears.

  On the other hand, when “document list” is selected in the first pull-down menu 1201, the document presentation unit displays the title of the first document information searched by the related document search unit 109 based on the designated first keyword. Present a list. An example of this presentation is shown in FIG. If the multi-window system is used as shown in FIG. 13, the keyword list presented by the keyword presenting unit 111 is displayed in one window, and the document title list presented by the document presenting unit is displayed in another window. it can. A window 1301 in FIG. 13 is a window for displaying a document title list. The document title list is acquired from the document DB 108 based on the first document ID list output from the related document search unit 109. Furthermore, the document presentation unit may present the document body when a document title of interest is specified by the user.

  The document information notification unit 1102 presses a notification button 1302 on the document title list screen displayed by the document information reference unit 1101, and thereby sends a message related to the first keyword to the sender or receiver of the message. A message notifying the existence of the first document (keyword and title name) is transmitted. The message transmission destination can be determined by referring to the message DB 102 based on the message ID given to the keyword and by the sender ID included in the message information.

  The document information creation requesting unit 1103 is a keyword presented in the italic font without underline among the keywords presented to the keyword presenting unit 111 (the second keyword extracted by the second keyword extracting unit 106, When the second document information related to the message information in which the keyword appears is specified in the section 110), a second pull-down menu 1401 as shown in FIG. 14 is displayed. The second pull-down menu 1401 has items of “document creation request” and “message list”.

  When the user selects “document creation request” in the second pull-down menu 1401, the document information creation request unit 1103 sends a message requesting document creation to the sender of the message in which the keyword appears. Further, when “message list” is selected by the user, a list of message information in which the second keyword appears can be referred to.

  As described above, according to the second embodiment, it is possible to refer to the document information related to the topic currently being discussed through the first keyword, and further, the presence of the document information is notified. You can introduce information that seems to be helpful. In addition, since it is possible to request the creation of a document through the second keyword, it is possible to encourage the grouping of the contents as a document when the discussion ends. Therefore, users in a position such as knowledge managers can effectively monitor other people's discussions, and in turn, these can promote knowledge sharing within the organization and the culture of knowledge as document information. .

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in each embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  DESCRIPTION OF SYMBOLS 101 ... Message receiving part, 102 ... Message database, 103 ... Message selection part, 104 ... Knowledge for message selection, 105 ... First keyword extraction part, 106 ... Second keyword extraction part, 107 ... Document registration part, 108 ... Document database 109: Related document search unit, 110 ... Corresponding document determination unit, 111 ... Keyword presentation unit, 1101 ... Document information reference unit, 1102 ... Document information notification unit, 1103 ... Document information creation request unit.

Claims (7)

A device that supports the sharing of knowledge about topics,
A message storage unit for storing a plurality of message information exchanged between a plurality of users;
A document storage unit that stores document information in association with the message information;
A selection unit that selects message information related to a topic to be stored as the document information in the document storage unit from the message storage unit, and an appearance of the most recent first period of the selected message information A first extraction unit for extracting a first keyword having a frequency equal to or higher than a reference value;
A second extraction unit for extracting a second keyword whose appearance frequency in a second period before the first period is a reference value or more from the selected message information;
A search unit for searching for first document information having a search score between the document storage unit and the message information from which the first keyword is extracted;
A determination unit that determines whether or not there is second document information associated with message information including the second keyword in the document storage unit;
A first presentation unit that presents the first keyword so that the presence or absence of the first document information in the document storage unit can be identified;
A knowledge sharing support apparatus comprising: a second presentation unit that presents the second keyword so that the presence or absence of the second document information in the document storage unit can be identified.   The knowledge sharing support apparatus according to claim 1, wherein the first presentation unit and the second presentation unit present the first keyword and the second keyword simultaneously.   The knowledge sharing support apparatus according to claim 1, further comprising a document reference unit capable of referring to the first document information obtained as a result of the search unit through the first keyword.   2. The document notification unit for notifying a user of first message information obtained as a result of the search unit through the first keyword regarding message information from which the first keyword is extracted. Knowledge sharing support device.   2. The knowledge sharing support apparatus according to claim 1, further comprising a document creation requesting unit that requests a user about creation of document information about the message information from which the second keyword is extracted through the second keyword. A method used for a device that supports sharing of knowledge about a topic,
Storing a plurality of message information exchanged between a plurality of users;
Storing document information in association with message information;
Selecting message information relating to a topic to be stored as the document information in the document storage unit from among the plurality of message information;
Extracting a first keyword whose appearance frequency in the most recent first period is a reference value or more from the selected message information;
Extracting a second keyword whose appearance frequency in the second period before the first period is a reference value or more from the selected message information;
Searching the first document information whose search score between the document storage unit and the message information from which the first keyword is extracted is a threshold value or more;
Determining whether there is second document information associated with message information including the second keyword in the document storage unit;
Presenting the first keyword so that the presence or absence of the first document information in the document storage unit can be identified;
Presenting the second keyword so that the presence or absence of the second document information in the document storage unit can be identified. A program for controlling a device that supports sharing of knowledge about a topic,
On the computer,
A process for storing a plurality of message information exchanged between a plurality of users;
Processing for storing document information in association with message information;
A process of selecting message information related to a topic to be stored as the document information in the document storage unit from the plurality of message information;
A process of extracting a first keyword whose appearance frequency in the latest first period is a reference value or more from the selected message information;
A process of extracting a second keyword whose appearance frequency in a second period before the first period is a reference value or more from the selected message information;
A process of searching for the first document information having a search score between the document storage unit and the message information from which the first keyword is extracted having a threshold value or more;
A process of determining whether or not there is second document information associated with message information including the second keyword in the document storage unit;
A process of presenting the first keyword so that the presence or absence of the first document information in the document storage unit can be identified;
A knowledge sharing support program for executing a process of presenting the second keyword so that the presence or absence of the second document information in the document storage unit can be identified.

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