JPH09146968A - Document retrieving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To retrieve the latest relative document by regarding the same document that a user specifies as reference document and retrieving another document to be referred to. SOLUTION: A test registration program 40 stores the text data of a registered document in a text storage area 100 on a magnetic disk 7, and also generates document management information for the registered document and stores it in the text storage area on the magnetic disk. Further, a reference document table generation and registration program 50 registers the document numbers of reference documents for respective registered documents to generate a reference document table. The generated reference document table is stored in a reference document table storage area 120 on the magnetic disk 7. Thus, the document obtained by referring to the relative document table generated in a relative document table generation and registration step for a reference document extracted in a reference document extraction step is extracted as a relative document.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document retrieval method for retrieving a document highly relevant to a document designated by a user from a document database. It is applied to databases, document management systems, document filing systems and electronic library systems.

[0002]

2. Description of the Related Art When reading a technical document such as a paper and investigating a technology of interest, a method of successively pulling down the references cited in the paper is often used. In this method, as shown in FIG. 2, references 1 and 2 referred to in reference 1 are cited and the contents are read. If that document alone is not sufficient, then references a, b referenced further in that document
Find out. Then, the bibliography of the reference documents is sequentially repeated until the desired document is obtained.

[0003]

However, in the method of pulling over the reference documents as described above, it is impossible to find a newer document than the document first read. That is,
There is a problem that the latest related literature cannot be found.

Referring to the example shown in FIG. 2, References 1 and 2 referred to in Reference 1 are older than Reference 1. References a and b referred to in Reference 1 are older than Reference 1. As described above, since the document obtained each time the pulling is repeated becomes an old document, there is a problem that a new document cannot be obtained from the original document and the latest document cannot be obtained.

The problem to be solved by the present invention is to provide a document search system capable of obtaining the latest document related to a target document.

[0006]

In order to solve the above problems, the present invention adopts the following configurations. (1) a text registration step of directly registering the registered document as text data; and (2) creating and registering a reference table in which link information from the registered document referred to in the registered document is registered. A reference document table creation / registration step, (3) a reference document table creation / registration step of creating and registering a related document table in which link information from the document referring to the registered document for the registered document is registered, and (4) At the time of searching for related documents, a reference document extraction step of extracting the reference documents referred to in the document designated by the user by referring to the reference document table created in the reference document table creation registration step. 5) Created in the related document table creation registration step for the reference documents extracted in the reference document extraction step The document obtained by reference to the pertinent literature table, a document search method having an associated document extracting as related literature.

By using the document search method having the above configuration, it is possible to search for another document that refers to the same document as the document designated by the user as a reference document.
In general, as a reference document, a document representative of each field is often cited, and the latest document is likely to include the same document as the old document as a reference document, so the document designated by the user with the reference document as a key. You will be able to search the latest documents that are highly relevant to.

The outline of the present invention will be described below with reference to FIG.

When registering a document, first, in a text registration step, document 1, document 2, document 3 and document 4 are registered as text data.

Next, in the reference document table creation / registration step, a reference document table in which the numbers of the reference documents referred to in each registered document are registered is created and registered. That is, in the example shown in FIG.
Since it refers to, the reference link is generated from document 1 to document 2. Since the document 2 is also referred to the document 5 in the same manner, the reference link is generated from the document 2 to the document 5. Hereinafter, the same processing is repeated for the document 3 and the document 4 to generate the reference link information shown in FIG. Then, based on the reference link information, a reference table in which the numbers of the references referred to in each registered document are registered is created.

Further, in the related document table creation / registration step, for each registered document, a related document table in which the link information from the reference source document that refers to the document is registered is created and registered. For example, referring to the reference link information in FIG. That is, the reference source entry of the reference destination link information is replaced with the reference destination entry, and the result is sorted by the reference destination document number to generate the reference source link information for the reference source document referring to each document. Then, based on the reference source link information, for each registered document, a related document table in which the number of the reference source document that refers to the document is registered is created.

The above is the processing at the time of registration.

Next, at the time of retrieval, the following processing is performed.

By referring to the reference table for the document specified in the reference extraction step, the document number of the reference referred to in the document specified by the user is acquired. That is, in the example shown in FIG. 5, the document 2 is obtained as the reference by referring to the reference table for the document 1 designated by the user.

Then, in the related document extracting step, a document having high relevance to the user's designation is extracted by referring to the related document table for the reference document obtained in the reference document extracting step. That is, in the example shown in FIG. 5, the document 1, the document 3, and the document 4 are obtained as the documents referring to the document 2 by referring to the related document table for the document 2 obtained in the reference extracting step.

By the above processing, the document 3 and the document 4 can be obtained as the documents highly related to the document 1.

As described above, according to the present invention, it is possible to obtain a newer document than the original document which cannot be obtained by the conventional method. Therefore, it becomes possible to search for the latest document highly relevant to the designated document.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a search system which is one configuration for realizing the document search method of the present invention. The search system shown in this figure includes a display 1 for displaying search results, a keyboard 2 for inputting registration and search commands, and a central processing unit CPU for executing registration processing and search processing.
3. Floppy disk driver FDD4 for reading data from the floppy disk, floppy disk 5 for storing document data to be registered in the database, main memory 6 for temporarily storing programs and data for registration and retrieval, storage for retrieval data And a bus 8 connecting them.

The main memory 6 has a system control program 10, a document registration control program 20, a related document search control program 30, a text registration program 40, a reference document table creation registration program 50, a related document table creation registration program 60, and a reference document. Extraction program 70
And the related document search program 80 is read from the magnetic disk 7 and the work area 90 is secured.

The magnetic disk 7 has a text storage area 100, a document management information storage area 110, a reference document table storage area 120, and a related document table storage area 13.
0, various program storage areas 140 are secured.
In the present embodiment, these storage areas are stored in the magnetic disk 7.
Although secured above, another secondary storage device such as a magneto-optical disk device may be used. The above is the configuration of the present search system.

Next, the process at the time of document registration and the process at the time of search of the document search method shown in this embodiment will be described.

First, the system control program 10 activates the document registration control program 20 by the registration command input from the keyboard 2 to start the document registration process. An outline of the process at the time of this document registration is shown in FIG.
This will be described with reference to the drawings.

First, the document registration control program 20 starts the text registration program 40 in step 1000. In the text registration program 40, the text data of the registered document is stored in the text storage area 10 in the magnetic disk 7.
0, and at the same time, the document management information is created for the registered document and this is stored in the text storage area 110 in the magnetic disk.
To be stored.

Next, the text registration control program 20
Starts the reference table creation registration program 50 in step 1001. The reference table creation / registration program 50 creates the reference table by registering the document numbers of the references of each registered document. The created reference table is stored in the reference table storage area 120 on the magnetic disk 7.

Finally, the text registration control program 20
Starts the related document table creation registration program 60 in step 1002. The related document table creation / registration program 60 performs the following processing for each registered document. The related document table is created by registering the number of the reference source document that refers to the registered document, and is stored in the related document table storage area on the magnetic disk 7. The above is the outline of the processing at the time of registration.

Next, the processing contents of the registration program will be described by taking the case where the document shown in FIG. 3 is registered as an example.

First, in the text registration program 40,
Floppy Disk The text data of Document 1, Document 2, Document 3, Document 4 and Document 5 are read from the floppy disk 5 inserted in the floppy disk drive 4 into the work area 90. This is as shown in step 1100 of FIG. Then, in step 1101, the text data read in the work area 90 is transferred to the magnetic disk 7.
The data is stored in the text storage area 100 inside.

Further, in step 1102, the document management information is read from the document management information storage area 110 in the magnetic disk 7 into the work area 90 on the main memory 6. In addition,
In this embodiment, the correspondence table shown in FIG. 8 is used as the information for managing the registered document.

Then, in step 1103, the title of the registered document is input from the keyboard.

Then, in step 1104, the input title is stored together with the following: Also stored are the document number of the registered document and the file name storing the relevant document. Thereby, the document management information is additionally registered.

When the above processing is completed, the document management information is stored in the document management information storage area 110 in the magnetic disk 7 in step 1105, and the processing of the text registration program 20 is completed.

The registration document is not only input using a floppy disk but also a communication line (not shown in FIG. 1).
It is also possible to adopt a configuration in which the data is input from another device by using, for example. In this case, the input is made through the bus 8 using a communication control device or the like.

Next, in the reference document table creation / registration program 50, first, in step 1200, the title of the reference document referred to in each registered document is input from the keyboard 2. This is shown in FIG. For example, document number 1
For this document, “development of communication conference system XX” is input as the document name of the reference document.

Then, in step 1201, the title in the document management information is searched by the title of the reference document. With this, the document number of each reference is acquired. That is,
For the document with the document number 1, the document number 2 is obtained as the document number of the reference document by searching the title in the document management information with “development of communication conference system XX” which is the title of the reference document.

Further, in step 1202, a reference destination link is generated by registering link information of the document numbers of each registered document and reference document. That is, the document number 2 is generated as the reference link from the document with the document number 1. Therefore, the reference source link information shown in FIG. 4 is generated for the document shown in FIG.

Then, in step 1203, step 1
Based on the reference link information generated in 202,
Register the reference number referenced in each registration document. This creates the reference table shown in FIG.

When the above processing is completed, the following processing is performed. In step 1204, the reference table and reference link information are stored in the reference table storage area 120 in the magnetic disk 7. Thus, the reference table creation registration program 50 ends.

Finally, the related document table creation / registration program performs the following processing as shown in FIG. First, in step 1300, the reference link information is transferred to the magnetic disk 7.
It is read from the reference table storage area 120 therein into the work area 90 on the main memory 6.

Then, in step 1301, the reference destination entry and the reference source entry of the reference destination link information are exchanged. Further, the reference source link information is generated by sorting by the reference source document number. This is as shown in FIG. Further, the number of the reference document referred to in each registered document is registered based on the reference source link information. As a result, the reference table is updated in step 130.
Create in 2.

When the above processing is completed, in step 1303, the related document table and the reference source link information are stored in the related document table storage area 130 in the magnetic disk 7. In this way, the related document table creation / registration program 60 ends. The above is the specific processing contents of the processing at the time of registration.

Next, FIG. 11 shows a processing procedure at the time of retrieval.
Hereinafter, the process at the time of search will be described by taking as an example the case where the document shown in FIG. 5 is searched for the document related to the document number 1.

First, the system control program 10 activates the related document search control program 30 by a search command input from the keyboard 2 to start the related document search process.

The related document retrieval control program 30
Starts the reference extraction program 70 in step 2000. The reference extraction program 70 acquires the document number of the reference referred to in the document designated by the user by referring to the reference table. That is, in the example of FIG. 5, the reference table is referred to for the document number 1 designated by the user. As a result, the document number 2 is obtained as the reference number referred to in the document number 1.

Next, the related document retrieval control program 30
Starts the related document extraction program 80 in step 2001. The related document extraction program 80 refers to the related document table based on the document number of the reference document extracted by the reference document extraction program 70. This allows
The number of the document that refers to the reference document in the document designated by the user is acquired. That is, in the example shown in FIG. 5, the related document table is referred to by the document number 2 obtained as the reference document for the document of the document number 1 designated by the user. This gives the document numbers 1, 3 and 4. Through the above processing, the documents 3 and 4 can be obtained as the documents highly related to the document 1. The above is the specific contents of the search process.

As described above, according to the present invention, another document which refers to the same document as the document designated by the user as a reference is searched. Therefore, it is possible to realize the latest search of related documents that could not be searched by the conventional related document search method.

[0046]

As described above, according to the present invention, it is impossible to search by the related document search method of the related art by searching for another document which refers to the same document as the document designated by the user as a reference document. It is possible to realize the latest search for related documents.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a related document search system according to the present invention.

FIG. 2 is a diagram illustrating conventional related document search.

FIG. 3 is a diagram showing a registration document in the embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a process of creating a reference document table and a related document table.

FIG. 5 is a diagram showing a processing example of a related document search according to the present invention.

FIG. 6 is a diagram showing a registration processing procedure in the present invention.

FIG. 7 is a diagram showing processing contents of a text registration program.

FIG. 8 is a diagram showing an example of document management information according to the present invention.

FIG. 9 is a diagram illustrating a processing procedure of a reference table creation registration program.

FIG. 10 is a diagram showing a processing procedure of a related document table creation registration program.

FIG. 11 is a diagram showing a search processing procedure in the present invention.

[Explanation of symbols]

1 ... Display, 2 ... Keyboard, 3 ... Central processing unit CPU, 4 ... Floppy disk driver FDD, 5
... Floppy disk, 6 ... Main memory, 7 ... Magnetic disk, 8 ... Bus, 10 ... System control program, 20 ...
Document registration control program, 30 ... Related literature search control program, 40 ... Text registration program, 50 ... Reference literature table creation registration program, 60 ... Related literature table creation registration program, 70 ... Reference literature extraction program 80 ... Related literature search program, 90 ... work area,
100 ... Text storage area, 110 ... Document management information storage area, 120 ... Reference literature table storage area, 130 ... Related literature table storage area, 140 ... Various program storage areas

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Akio Higashi 1-6-27, Shinsuna, Koto-ku, Tokyo Hitachi, Ltd. Public Information Division

Claims (1)

[Claims] 1. A document retrieval method for retrieving a plurality of registered documents registered in a document database, wherein first link information from the registered document for a reference document referred to in the registered document is created, and
The second link information from the other registration documents that refer to the registration document with respect to the registration document is created, and when the registration document is designated by the user, the second link information is used by using the first link information. A document search method, wherein a reference document of a designated registered document is extracted from the document database, and a document related to the extracted reference document is extracted using the second link information.