JPH06318234A - Document retrieving device - Google Patents

Abstract

PURPOSE:To enable retrieval with similarity between documents in the case of document retrieval by calculating the similarity and difference mutually between documents corresponding to the attribute set of the document. CONSTITUTION:A document attribute value condition input means 6 inputs the different point or equal point of a document presented at present by a user. A document attribute type condition input means 7 designates the retrieval corresponding to the type of an attribute to be conscious of as the different or equal point. The user designates the document presented at present as the document provided with the close attribute by using a document adjacent request input means 8. Corresponding to these retrieval conditions, the document is retrieved by a similarity/difference retrieving means 11 while using the information calculated by a similarity calculating means 9 and a difference calculating means 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document retrieval device,
In particular, the present invention relates to a document search device having a search function based on a document and its difference and similarity.

[0002]

2. Description of the Related Art A conventional document search device is a document search device that searches for a target document by inputting only the attributes of the document as a search condition, narrowing down the number of documents by a plurality of search conditions. When searching for a document, when one document is searched and it is felt that the document is not the target document but is close, a search request based on the similarity that the document is very similar to the target document is requested. Occasionally, a search request may occur with the difference that it is the same as the target document in some respects but different in some respects. For example, Japanese Patent Laid-Open No. 2-2458 proposes a method of automatically extracting a keyword from a document in which the keyword is not assigned, calculating the degree of similarity between the keyword and a keyword given as a search key, and searching the document. Has been done,
Even if a document having no keyword is given as a search key, it is possible to search for a similar document by extracting the keyword from the document.

[0003]

However, since the conventional search device does not provide such a search means, the attribute of the document must be input as the search condition from the beginning to perform the search. Exists.

Even the search method described in the above publication does not provide a search method in which a document is used as a search source and a difference or similarity with the document is further specified.

As described above, in the conventional document retrieval apparatus, when one document is retrieved or is already presented, designation of document retrieval similar to the document and a certain aspect of the document are performed. There is a problem that the search of different documents cannot be specified.

[0006]

In order to solve the above-mentioned problems, a document retrieval apparatus according to the present invention includes a document storage unit for storing a document, a document attribute storage unit for storing attributes attached to the document, and a document storage unit for storing the document. Retrieval condition input means for inputting retrieval conditions, document retrieval means for retrieving documents according to the retrieval conditions, document presentation means for presenting retrieved documents and information about the documents, and retrieval conditions for specific documents and attribute values A document attribute value condition inputting means, a document attribute type condition inputting means for inputting a specific document and attribute type as a search condition, and a document neighborhood request inputting means for inputting a request to present a neighborhood of a specific document , A similarity calculation means for calculating a similarity from the attribute of the search source document and an attribute of another document, and a difference calculation means for calculating a difference from the attribute of the search source document and an attribute of another document, A plurality of search results and a similarity / difference search means for searching a document according to the similarities or differences and the search conditions obtained by the document attribute value condition input means, the document attribute type condition input means, and the document neighborhood request input means. In the case of a document, it has a neighborhood information presenting means for presenting similarity / difference information of the search source document and its neighboring documents.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
Referring to FIG. 1, in the embodiment of the present invention, a document database 1 internally including a document storage unit 2 for storing a document and a document attribute storage unit 3 for storing attributes attached to the document, and a document search condition are set. Search condition input means 4 for inputting, document search means 5 for searching a document according to the search condition input by the search condition input means 4, and the document search means 5
The document presenting unit 12 that presents the document retrieved by the search and the information about the document, the document attribute value condition inputting unit 6 that inputs the value of the specific document and the attribute as the retrieval condition, and the type of the specific document and the attribute are retrieved. A document attribute type condition input means 7 to be input as a condition, a document proximity request input means 8 to input a request to present a neighborhood of a specific document, and a similarity is calculated from the attribute of the search source document and the attribute of another document. The similarity calculation means 9, the difference calculation means 10 for calculating the difference from the attribute of the search source document and the attribute of another document, the calculated similarity or difference and the document attribute value condition input means 6 And a similarity / difference search means 11 for searching a document according to the search conditions obtained by the document attribute type condition input means 7 and the document neighborhood request input means 8 and the search source when the search result is a plurality of documents. Written and composed neighbor information presenting means 13 for presenting a similarity-difference of information in the neighbor document.

The normal search condition of the document input by the search condition input means 4 is the document search means 5 through the communication line 45.
Sent to. In the document search means 5, the document attribute storage means 3
The document attributes are retrieved through the communication line 35, the attributes that meet the conditions are searched, and the corresponding document is retrieved from the document storage means 2 through the communication line 25. The retrieved document is sent to the document presenting means 12 through the communication line 512 and presented to the user. The specific document (presenting document) and the attribute value input by the document attribute value condition input means 6 are transmitted through the communication line 611, and the specific document and the attribute type input by the document attribute type condition input means 7 are transmitted through the communication line 711. The distance between the specific document and the neighborhood input by the document neighborhood request input means 8 is sent to the similarity / difference search means 11 through the communication line 811. The similarity / difference search means 11 retrieves the document attribute from the document attribute storage means 3 through the communication line 311. The attribute of the search document and the attribute of the display document are sent to the similarity calculating means 9 through the communication line 119 and to the difference calculating means 10 through the communication line 1110. The similarity and the difference calculated by the similarity calculating means 9 and the difference calculating means 10 are sent to the similarity / difference calculating means 11 through the communication line 911 and the communication line 1011, respectively. Similarity / difference / difference search means 1
In step 1, a document corresponding to the search condition is searched based on the obtained similarity / difference, and the corresponding document is retrieved from the document storage means 2 through the communication line 211. When there is only one retrieved document, it is sent to the document presenting means 12 through the communication line 1112 and presented to the user. If there are a plurality of retrieved documents, they are sent to the neighborhood information presenting means through the communication line 1113, and the retrieved documents are presented together with the similarity / difference between the documents.

In this embodiment, the attributes include keywords existing inside the document and keywords added to the document.

In the document attribute value condition input means 6, the user inputs the point that the present document is different from or the same as the present document. For example, the relevant presentation document was written by "Sato", but the document that I wanted to search was specified by me, or that the keyword "economic friction" was added to this document. Specify that the keyword "Prime Minister" is omitted from.

In the document attribute type condition input means 7, when the user cannot clearly specify the difference from the currently presented document, the search is specified by the attribute type which can be recognized as different or the same. For example, it is not possible to remember when the document was written, but it is specified that the "creation date and time" is different from this document.

In the document proximity request input means 8, when the user recognizes that the currently presented document is not this document, but is very similar, it specifies that the document is close in attributes. .

With respect to these search conditions, the similarity calculating means 9 classifies the documents having more common attributes as similar documents. Further, the difference calculation means 10 further classifies the differences between similar documents according to different attributes. As these calculation methods, for example, a method may be used in which the number of different attribute values of two documents is calculated as the distance between the documents and the distance is used to classify the documents. The similarity / difference search means 11 searches for a document that matches the search condition using the calculated similarity and difference of the document.

When there are a plurality of sentences as the search result, the neighborhood information presenting means 13 adds the difference between the relevant search source sentence and the retrieved sentence to the retrieved sentence and presents it to the user. As this presentation method, for example, a method in which the search source means and the retrieved document are represented by a graph structure having nodes as respective nodes and an attribute value indicating the difference is given to an arc connecting the search source means and the retrieved document is used. Can be used.

[0015]

As described above, in the document retrieval apparatus according to the present invention, when one document is retrieved or has already been presented, designation of document retrieval similar to the document, There is an effect that a document search can be performed by designating a search of a document having a certain viewpoint different from that of the document. In addition, this document retrieval device handles similarities / differences not only for documents composed of characters but also for additional attributes such as image data and audio data, so that the similarity / difference between multimedia documents You can also search.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Document Database 2 Document Storage Means 3 Document Attribute Storage Means 4 Search Condition Input Means 5 Document Search Means 6 Document Attribute Value Condition Input Means 7 Document Attribute Type Condition Input Means 8 Document Neighbor Request Input Means 9 Similarity Calculation Means 10 Difference Calculation Means 11 Similarity / Difference Searching Means 12 Document Presenting Means 13 Neighborhood Information Presenting Means

Claims (1)

[Claims] 1. A document holding unit for holding a document, a document attribute holding unit for holding an attribute attached to a document, a search condition input unit for inputting a search condition of a document, and a document search unit for searching a document according to the search condition. A document presenting means for presenting the retrieved document and information about the document; a document attribute value condition inputting means for inputting a value of a specific document and an attribute as a search condition; and a search condition for a specific document and an attribute type. As a document attribute type condition inputting means, a document neighborhood request inputting means for inputting a request to present a neighborhood of a specific document, and a similarity calculating a similarity from the attribute of the search source document and the attribute of another document A calculating means, a difference calculating means for calculating the difference from the attribute of the search source document and the attribute of another document, the calculated similarity or difference and the document attribute value condition input means and the document attribute type condition Similarity / difference search means for searching documents according to the search conditions obtained by the input means and the document proximity request input means, and similarity / difference information of the search source document and its neighboring documents when the search results are a plurality of documents. A document search device comprising: neighborhood information presenting means for presenting.