JPH09223152A - Document retrieval device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a document retrieval device capable of instantaneously processing a newly registered document file as an object to be retrieved and attaining efficient resource management. SOLUTION: When a new document file is inputted by a new document input part 15, a retrieval index preparing part 16 prepares index data corresponding to the newly registered document file and stores the prepared data in a memory 13 and a document retrieving part 12 retrieves document files by using the index data of the new document file stored in the memory 13 and that of an existing document file stored in a disk device 17. Thereby the new document can be instantaneously processed as an object to be retrieved without waiting the storage of the index data corresponding to the new document in the disk device 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document retrieval apparatus for retrieving a document file containing a specified keyword from a huge number of document files, and more particularly to index data for fast retrieval of document files. In a document retrieval device of a type that is created in advance and retrieves a document file using this index data, a newly registered document file can be immediately targeted for retrieval, and efficient resource management can be realized. The present invention relates to a document search device.

[0002]

2. Description of the Related Art In recent years, with the widespread use of word processors and the like, various document search systems have been developed for searching for a document file required by a user from a huge number of document files. In such a document search system, a method in which a user inputs a desired keyword, a document file including the keyword is searched, and the search result is displayed in a list is mainly used.

Currently, as a document retrieval apparatus for performing such a keyword retrieval, an index for retrieval is prepared in advance and stored in a disk or the like to realize high-speed retrieval, and a retrieval index is not prepared. , It is roughly divided into the one that directly searches the text data of the document when executing the search.

The former method does not spend a lot of time for index creation as the processing capacity of a computer is improved, but it is still large for input / output processing of a secondary storage device such as a disk. Therefore, when searching a newly entered document such as an email or news article, the user stores the created index in the secondary storage device before executing the search. It takes a lot of time to wait for a search for a new document, and the merit of using the index is not utilized.

On the other hand, the latter method does not cause such a problem that the user waits for the completion of the storage of such an index, but the retrieval speed itself is relatively slow and is not suitable for retrieval of a large number of documents. Also, repeat the search trial,
It is clear that the former is more efficient in the case of high-performance processing such as inputting a plurality of keywords and narrowing down candidate documents.

[0006]

As described above, in the conventional document search system, when a search index is created in advance, it takes a long time to store the search index, so that a newly registered document is immediately searched. However, if a search index is not created, the time required to store the search index becomes unnecessary, and as a result, a newly registered document can be immediately searched. On the other hand, there is a problem that the search itself spends a lot of time.

The present invention has been made in view of the above circumstances, and when a new document is searched for in a document search device for high-speed search using a search index,
An object of the present invention is to provide a document search device that minimizes the problems that occur when creating a search index.

[0008]

SUMMARY OF THE INVENTION The present invention is a document retrieval device for retrieving a document file containing a desired keyword from a plurality of document files, wherein index data for retrieving the document file at high speed is provided. In a document search device that is created in advance and uses the index data to search for the document file, a new document registration means for registering a new document file and index data corresponding to the newly registered document file are provided. A document file is searched using both the index creating means for creating and storing it in the memory, and the index data of the new document file stored in the memory and the index data of the existing document file stored in the secondary storage device. And a document search means.

According to the present invention, the index data corresponding to the newly registered document file is not stored in a secondary storage device such as a disk device which requires a relatively long time to store the index data, but rather in a comparative manner. It is first stored in a memory with a short storage time. Then, the search for the document file is performed by using both the index data of the new document stored in this memory and the index data of the existing document stored in the disk device or the like.

As a result, the user does not have to wait for the index data corresponding to the new document to be stored in the disk device, and even if a high speed search using the index data is executed, It becomes possible to immediately search a document.

The present invention further comprises new document selecting means for allowing the user to select which of the new document files registered by the new document registering means the index data corresponding to which is to be created. The index creating means is provided with means for creating only index data corresponding to the document file selected and instructed by the new document selecting means and storing the index data in the memory.

A plurality of newly registered document files are
For example, depending on the genre and category of the document,
Document files are classified into document files that the user wants to search at high speed in the future and document files that should be stored first, but these document files are usually mixed as new documents. Therefore, it is desirable to manage such that index data is not created for all newly registered document files, but only those selected by the user. As a result, it is possible to prevent unnecessary consumption of resources such as a memory and to limit the amount of index data, so that an efficient search can be realized.

Further, according to the present invention, a first search is performed using only the index data stored in the memory, and a second search is performed using only the index data stored in the secondary storage device. And a search range designating unit that allows the user to designate, as a search range, any one of the third searches using both the index data stored in the memory and the index data stored in the secondary storage device. However, the document search means includes means for performing a search according to the designation of the search range designation means.

That is, if the user selects how to use the index data of the new document stored in the memory and the index data of the existing document stored in the secondary storage device, only the new document can be selected. It is possible to provide the user with a flexible search environment in which a plurality of search ranges can be set, such as a search, a search only for existing documents, or a search including both.

Further, according to the present invention, storage instruction means for instructing a user whether or not to store the index data stored in the memory in the secondary storage device, and storage in the secondary storage device are instructed. And a storage unit for storing the index data stored in the memory in the secondary storage device.

According to the present invention, the user is allowed to select whether to store the index data of the new document stored in the memory in the secondary storage device, so that all the index data are not necessarily stored in the secondary storage. Without storing it in the device, it is also possible to search once and discard index data that you feel is unnecessary,
More efficient resource management will be realized.

Further, the present invention is characterized by further comprising means for discarding the index data when the index data stored in the memory has not been used for a predetermined period.

The present invention further comprises means for saving the index data stored in the memory in the secondary storage device when the index data has not been used for a predetermined period. It is characterized by

That is, according to the present invention, the user is not allowed to judge whether or not the index data of the new document is stored, but the index data is discarded when it has not been used for a predetermined period of time, or a predetermined period of time has passed. By doing something such as saving to the secondary storage device when there is no use beyond it, the usability can be dramatically improved.

[0020]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a document search device according to the present embodiment. This document retrieval device 1
As shown in FIG. 1, 0 includes an interface unit 11, a document search unit 12, a memory 13, a document management unit 14, a new document input unit 15, a search index creation unit 16, and a disk device 17.

The interface unit 11 administers an interface between the user and the document retrieval apparatus 10, and takes in a user's instruction via a pointing device such as a keyboard or a mouse, and also displays various processing results to the user via a display. Present the screen. The document retrieval unit 12 retrieves the corresponding document file from the plurality of document files 172 stored in the disk device 17 according to the retrieval instruction notified via the interface unit 11. The search instruction includes a keyword to be searched, a search range, and the like. This search range is
This is one of the features of this embodiment, which will be described later.

The memory 13 has a search index creating section 1
The index data of the newly registered document created by No. 6 is held. When a new document is registered, the document management unit 14 presents a list of new documents to the user through the interface unit 11 so that the user can select which document file to create index data for. The search index creation unit 16 is notified of the selection result made by the user for the presentation.

The new document input unit 15 inputs a new document file according to the instruction of the document management unit 14 and registers it in the disk device 17. Search index creation unit 16
The new document input unit 15 creates index data corresponding to the document file instructed by the document management unit 14 among the new document files registered in the disk device 17, and stores it in the memory 13.

Next, the operation of this embodiment will be described with reference to FIG. When the document search apparatus 10 according to the present embodiment is started, the initialization process is first executed (step S1), and each processing unit, the memory, and the like are initialized. Then, when this initialization processing ends, the document management unit 14 instructs the new document input unit 15 to load the new document file (step S2). Upon receiving this instruction, the new document input unit 15 stores the newly distributed document file in the disk device 17, for example.

Next, the document management unit 14 allows the user to select and instruct which of the new document files newly stored in the disk device 17 by the new document input unit 15 the search index is to be created. ,
The interface unit 11 is instructed to display the list of the new documents and notify the selection result (step S3). When the selection result by the user is notified via the interface unit 11, the document management unit 14 causes the search index creation unit 16 to
Is instructed to create an index index corresponding to the selected document file (step S4).

On the other hand, upon receipt of this instruction, the search index creating section 16 reads the corresponding document file 172 of the disk device 17, creates an index index corresponding to this document file, and stores it in the memory 13. This index index is suitable for searching keywords, for example, by performing morphological analysis on words and phrases in a document file and converting redundant documents into concise documents consisting of noun phrases. Data is created in the specified format. Further, here, since the data is not stored in the disk device 17, the user is not made to wait more than necessary.

Therefore, at this stage, the document search apparatus 10 of this embodiment holds the search index for the new document file in the memory 13, and the search index for the existing document file as the disk device 17.
It will be in the state of holding.

Here, when the user searches for documents,
First, a keyword is input (step S5) and a search range is designated (step S6). This search range is a search within the range of a new document file using only the index index stored in the memory 13 or the memory 13
Index index stored in disk and disk device 1
Either the new document file or the search within the range of all the existing document files using both of the index indexes stored in 7 will be selected.

When the search range is specified only for a new document (Y in step S7), the specification and the keyword are passed from the interface unit 11 to the document search unit 12, and the document search unit 12 stores in the memory. Only the index index stored in 13 is used, that is, only the newly registered document is set as the search range to search the document file including the keyword (step S8). On the other hand, when the designation of the search range is not only for the new document (N in step S7), the designation and the keyword are passed from the interface unit 11 to the document search unit 12, and the document search unit 1
Reference numeral 2 denotes a document that includes both the index index stored in the memory 13 and the index index stored in the disk device 17, that is, a document including the keyword as a search range for both a newly registered document and an existing document. A file is searched (step S9).

Then, the document search section 12 presents the search result to the user via the interface section 11 (step S10). As a result, the user can immediately search for a new document even in the document search using the index data.

When the index index stored in the memory 13 is to be stored in the disk device 17 by the user, it is instructed whether or not to store it in the disk device 17 as an index index of an existing document file (step S11). (Y in step S11), the interface unit 11 notifies the document management unit 14 of the fact, and the document management unit 14 having received this notification stores the index index stored in the memory 13 in the disk device 17. Yes (step S12).

Then, the document management unit 14 erases the index index stored in the memory 13 (step S13), and loads the next new document file (step S13).
Prepare for 2).

As a result, even for a newly registered document file, there is no need to wait for storage of the index index in the disk device, so that the newly registered document can be immediately searched. Become. Further, since it is possible to select whether or not the index index is stored in the disk device 17, it is possible to realize efficient resource management.

It is also effective that the document management unit 14 manages the new document file stored in the memory 13 as follows instead of deciding whether to store the new document file in the disk device 17 according to the user's selection. Is. (1) When the index index stored in the memory 13 has not been used for a predetermined period of time, the index index is deleted from the memory 13. (2) When the index index stored in the memory 13 has not been used for a predetermined period of time, the index index is saved in the disk device 17 (memory 13
Erase from above). As a result, the memory 13 can be effectively used, and its usability is dramatically improved.

[0035]

As described in detail above, according to the present invention, a newly registered document file can be immediately incorporated as a search target even in a document search device of a type that executes high-speed search using index data. In addition, more flexible searches such as searches for new documents only and searches for existing documents can be performed. Furthermore, index data to be resident in memory is stored in the secondary storage device according to prescribed rules. As a result, the resources will be efficiently managed.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a document search device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the same embodiment.

[Explanation of symbols]

10 ... Document search device, 11 ... Interface unit, 12 ...
Document search unit, 13 ... Memory, 14 ... Document management unit, 15 ...
New document input unit, 16 ... Search index creation unit, 17
... Disk device, 171 ... Search index, 172 ...
Document file.

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Claims (6)

[Claims] 1. A document retrieval device for retrieving a document file containing a desired keyword from a plurality of document files, wherein index data for fast retrieval of the document file is created in advance, and the index data is created. In a document retrieval device for retrieving the document file using data, a new document registration means for registering a new document file, and an index for creating index data corresponding to the newly registered document file and storing it in a memory And a document search unit for searching the document file using both the index data of the new document file stored in the memory and the index data of the existing document file stored in the secondary storage device. A document retrieval device characterized by: 2. A new document selecting means for allowing a user to select which of the new document files registered by said new document registering means the index data corresponding to which document file is to be created, the index creation 2. The document search device according to claim 1, wherein the means comprises means for creating only index data corresponding to the document file selected and instructed by the new document selecting means and storing the index data in the memory. 3. A first search for searching using only the index data stored in the memory, a second search for searching using only the index data stored in the secondary storage device, and a memory for searching the memory. The document further includes a search range designating unit that allows a user to designate, as a search range, any one of a third search that is performed using both the stored index data and the index data stored in the secondary storage device. 3. The document search device according to claim 1, wherein the search means comprises means for performing a search according to the designation of the search range designation means. 4. A storage instructing means for instructing a user whether or not to store the index data stored in the memory in the secondary storage device, and a storage instructing means for instructing a user to store the index data in the secondary storage device, 4. The document search device according to claim 1, further comprising a storage unit that stores the index data stored in the memory in the secondary storage device. 5. The method according to claim 1, further comprising means for discarding the index data when the index data stored in the memory has not been used for a predetermined period. Alternatively, the document search device described in 3. 6. When the index data stored in the memory has not been used for a predetermined period of time, the index data is further stored in the secondary storage device. Claim 1,
The document search device described in 2 or 3.