JPS6254369A - Document file retrieving system - Google Patents

Abstract

PURPOSE:To form index information for retrieving a document file at high speed without using an auxiliary recording medium other than an optical disk by writing a part of the index information in the optical disk. CONSTITUTION:A retrieving device 3 is connected to a system control device 4, information in an optical disk built in an optical disk control device 1 is read out through the control device 4 and information can be written in the optical disk. A part of the retrieving information is written in the optical disk. The retrieving device 3 forms index information for retrieving a document on the basis of the information sent from the system control device 4, and when a keyword is supplied from the system control device 4, sends a document No. corresponding to the keyword to the system control device 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is capable of searching and executing document files written on so-called write-once storage media that cannot be rewritten, such as optical discs, without using auxiliary storage media such as 70 disks or hard disks. This document relates to a document file search method that allows users to search for documents.

A conventional document file system using a so-called write-once storage medium (optical disk), as shown in FIG. and a document input/output device 2 equipped with a display section, a search device 3 that stores index information for searching document files, and a system control device 4 that controls each of these devices 1 to 3 as a whole. The conventional specific configuration of the search device 3 is as shown in FIG.
2, a main memory 33 for this search control section 32 to execute data processing, an auxiliary memory interface section 34, and an auxiliary memory drive section 36 (details thereof will be described later).

The conventional optical disc storage area 5 built into the optical disc control device 1 is divided into a document management information area 51 and a document information area 62, as shown in FIG. Management information #1a to #Na of the loaded document information #1 to #N is written in the document management information area 51.

These management information #1a to #Na include a document number DN indicating the number of each document file, document location information AD indicating the position of each document file, and information for each document file as shown in FIG. Attached keywords KWi, t-KWi
, n are included.

On the other hand, in the storage area of the auxiliary storage medium (floppy disk, hard disk, etc.) built into the search device 3, as shown in FIG. Index information is recorded in which one index cell consisting of lists DN11 to DN1 and ml and similar index cells from index cell 2 to index cell K are sorted in descending order of keywords KW and ~KWk. ing. This index information is the document number D of the document file with the specified keyword.
N, is used to search quickly.

When registering a document file, the system control device 4 sends the document management information to the search device 3 every time document information and document management information corresponding thereto are recorded on the optical disk built in the optical disk control device 1. Send.

The search device 3 searches whether each keyword included in the received document management information is included in the index information as explained in FIG. Only the document numbers included in the document management information are added to the document number list, and if the same keyword does not exist, an index cell consisting of the keyword and the document number is inserted at a predetermined position in the index information storage area.

When searching for a document file, the system control device 4 transmits the keyword of the document to be searched to the search device 3.

The search device 3 searches the index information (consisting of a keyword and document number list), obtains the document number of the document file corresponding to the received keyword, and returns it to the system control device 4.

Based on the document number returned from the search device 3, the system control device 4 extracts document management information corresponding to the document number from the document management information area 61 (see FIG. 7) of the optical disk built in the optical disk control device 1. (for example, #1a), and use the document location information ADi (see Figure 2) therein as the base document information. This is how the operation of the conventional search device 3 that executes the above-mentioned functions is performed. This will be explained with reference to FIG.

When registering a document, the system interface section 31 receives the document management information (for example, #1a) sent from the system control device 4, and the search control section 32 stores the output of this system interface section 31 on the main memory 33. After format conversion, the auxiliary storage interface unit 34 is controlled to write the index cell at a predetermined position in the index information storage area (see FIG. 3) on the auxiliary storage medium built in the auxiliary storage drive unit 35. .

Also, when searching for document files, the system control device 4
Keywords sent from (e.g., t ld' KWl
) Received by the system interface unit 31, and based on the output of this system interface unit 31, the search control unit 32
controls the auxiliary storage interface unit 34, searches for the document number corresponding to the keyword from the index information on the auxiliary storage medium built in the auxiliary storage drive unit 36 (see FIG. 3), and searches the document number on the main memory 33. After format conversion, the system interface section 31 is controlled to return the document number to the system control device 4.

Problems to be Solved by the Invention However, when using the conventional document file search method described above, it is essential to use auxiliary storage media such as floppy disks and hard disks, which reduces the cost of document file systems using optical disks. This is a major impediment to doing so. Furthermore, when a hard disk is used as an auxiliary storage medium, the number of optical disks that can be handled is limited. Furthermore, when a removable auxiliary storage medium such as a floppy disk is used, there is a complication that the optical disk and the auxiliary storage medium must be used in pairs.

These problems are caused by the fact that the index information is stored in an auxiliary storage medium (floppy disk, hard disk, etc.).

As a workaround for the above-mentioned problem, when an optical disc is set in the optical disc control device 1 (see Fig. 6), all document management information in the document management information area 61 (see Fig. 7) in the optical disc is read out and indexed. A document file search method has been proposed in which document files are searched after creating information and recording this index information on an auxiliary storage medium such as a node disk. , a new problem arises in that it takes a lot of time to create the index information.

The present invention was made in consideration of the above-mentioned circumstances, and provides a document file search method that can create index information for document file searches at relatively high speed without using an auxiliary storage medium other than an optical disk. The purpose is to provide.

Means for Solving the Problems In order to achieve the above-mentioned object, the document file search method of the present invention divides the storage area of an optical disc into a document information area, a document management information area, and an index information area. When writing new document information, document management information corresponding to the document information is created and written in the document management information area.

In addition, each time the number of keywords attached to the document management information that has already been written increases to a predetermined number or more, new index information is created, and this is added to the index information area. At the time of setting, the latest index information is obtained from the index information area, and for already registered document information that is not included in this index information, the latest index information is obtained based on the document management information corresponding to the document information in the document management information area. By creating index information and inserting it into the latest index information, index information for all already registered document information is generated, and document file searches are performed based on this index information. It is characterized by

By using the above method, the information recorded at the end of the index information area (
The latest) index information (for example, index information regarding documents #1 to #ML) is obtained, and document information (for example, documents #ML+1 to #N) that is not included in this index information is stored in the document management information area of the optical disc. The document management information (for example, #ML+1a to #N) corresponding to the document information is read out, and based on the information therein, the index information (documents #1 to #M
, ), the document number of each document information after document #ML+1 and the keyword attached to each document information are additionally inserted.

Therefore, index information for all registered document information is created relatively quickly.

Embodiment Hereinafter, as an embodiment of the present invention, a case where the present invention is applied to the document file system shown in FIG. 5 described above will be described.

In the document file system shown in FIG. 5, the storage area 6 of the optical disc used in the present invention set in the optical disc control device 1 is the document management information area 5, as shown in FIG.
1, a document information area 62, and a newly set index information area 63.

The document information area 52 is a portion where the contents of documents (hereinafter referred to as document information) are written, and each document information is assigned document numbers #1 to #N in the order of registration.

The document management information area 51 is a portion where document management information #1J1 to @Nfig corresponding to all the document information #1 to #N written in the document information area 62 is written, and each document management information Information #1a to #Na each has a format as shown in FIG.

For each format, the relevant document management information (for example #1a
), and document location information AD indicating the document number DN of the document file corresponding to ) and the address information where the document information is written.
i and 191 to KWi, n (search information) are recorded for a plurality of keywords, respectively.

The index information area 53 uses the document information #1 to #N- written in the document information area 62 as the keyword (search information).
This is the part where index information for searching from is written, index information regarding document information from document numbers #1 to #duck, index information regarding document information from document numbers #1 to #ma → shi, document Index information regarding document information numbered #1 to #0 is written in order.

As shown in FIG.
), the information consists of keywords (for example, KW,
) and the document number with that keyword (DNl, 1 to DN
An index cell (for example, index cell 1) consisting of a list of keywords (KW1 to KWk) consisting of a list of keywords (KW1 to KWk) is arranged in descending order of keywords (KW1 to KWk). An example of the configuration, as shown in FIG. 4, includes a system interface section 31 connected to a system control device 4, a search control section 32, and a main memory 3.
3, the auxiliary storage interface section 34 and the auxiliary storage drive section 35 that were provided in the conventional device 3 of this type are omitted, making it simple.

By reading out the index information written last in the index information area 63 (for example, information regarding documents #1 to #ML) into this search device 3 (detailed operation will be described later), Document information #1 to #ML among document information #1 to #N registered in the document information area 62
) index information (Tsumashi, said documents #1 to #M
information regarding L) is obtained.

For the remaining document information @ ML +1 to #N, the corresponding document management information (#ML+, a to #Na
) is read from the document management information area 61 (see FIG. 1),
The document number (for example, DNL) and keyword (search information) in the read document management information format (see FIG. Insert additional information and go.

In this way, index information for all document information #1 to #N registered in the document information area 62 is generated in the index information area 53.

After that, a document search is executed by specifying each of these index information (keywords). Furthermore, when new document information is registered in the document information area 62, the document management information corresponding to the document information is changed to the document management information. The information is added to the area 51 and additionally inserted to a predetermined position of index information (described later) in the search device 3.

Then, the number of keywords included in the index information in the search device 3 is greater than or equal to a predetermined number M than the number of keywords included in the index information recorded at the end of the index information area 53 in the optical disc. When the index information in the search device increases, the index information in the search device is transferred to the index information area 53 in the optical disk.
Therefore, the first index information in the index information area 53 of the optical disc includes M index cells 1, 2, etc. as shown in FIG. The th index information includes 2XM index cells, and similarly, the th index information includes LxM index cells.

When the search device 3 creates index information, it reads the index information written at the end of the index information area 53 of the optical disc, and
After that, the document management information corresponding to each of the registered final document information is sequentially read from the document management information area 51 from the document information next to the document information included in the index information, and the index information contained therein is read out sequentially from the document management information area 51. Information (keywords and document numbers) is additionally inserted into predetermined positions of the previously read index information. The processing time at that time is approximately determined by the number of additional keywords to be inserted.

Here, the search device 3 is connected to a system control device 4, as shown in FIG. (see FIG. 3) and write information into the optical disk.

That is, the search device 3 creates index information for document retrieval based on the information sent from the system control device 4, and then, when a keyword is supplied from the system control device 4, it responds to this keyword. The document number to be updated is sent to the system control device 4.

To explain the specific operation, first, when an optical disc is set in the optical disc controller 1, the system controller 4 controls the optical disc controller 1 to write to the end of the index information area 53 of the optical disc. The stored index information is read out and transmitted to the search device 3. The search control unit 32 in the search device 3 shown in FIG. 4 loads the index information received by the system interface unit 31 into the main memory 33,
The system control device 4 controls the system interface unit 31 to determine the number of keywords included in the index information.
Return to.

Next, the system control device 4 controls the optical disk control device 1 to sequentially read document management information corresponding to document information not included in the index information from the document management information area 51 of the optical disk, and search for the document management information. Send to device 3.

The search control unit 32 in the search device 3 sequentially adds and inserts the document number and keyword in the document management information received by the system interface unit 31 into the index information on the main memory 8.

After completing the creation of index information for all the document information registered on the optical disc, the search control unit 32 of the search device 3
The system interface section 31 receives the keyword sent from the system control device 4, searches for the document number corresponding to the keyword based on the index information in the main memory 8, and sends the document number to the system interface section. The data is sent back to the system control device 4 via 31.

Further, when registering document information, the system control device 4 adds new document information input from the document input/output device 2 to the document information area 62 of the optical disk, and also writes document management information for the new document information. This is created and added to the document management information area 51. Thereafter, this document management information is sent to the search device 3 (see FIG. 4).

In the search device 3, the system interface section 31 receives the sent document management information, and sends the kill word and document number (see FIG. 2) included in the document management information to the search control section 32. The index information is additionally inserted into a predetermined position on the main memory 33 via the system interface unit 31! It is returned to the system control device 4 via.

The system control device controls the index information area 63 in the optical disc.
The increase in the number of keywords (K,
-,) is greater than or equal to a predetermined number M, an index information recording instruction signal is transmitted to the search device 3.

When the search control unit 32 of the search device 3 receives an index information recording instruction via the system interface unit 31, the search control unit 32 controls the system interface unit 31 to transmit the index information on the main memory 33 to the system control device 4. The system control device 4 controls the optical disk control device 1 to additionally insert the received index information into the index information area 53 of the optical disk.

In this manner, in this embodiment, index information for all registered document information is written to the optical disk every time the number of keywords attached to registered document management information increases by a predetermined number M or more. Therefore, the following is possible. That is, when an optical disc is set in the optical disc control device 1, the time required to create index information for all registered document information can be suppressed within a certain period of time. Further, by adjusting the value of the predetermined number M, it is possible to control the start-up time when setting the optical disk. Furthermore, the document file system can be started up much faster than reading out all document management information and creating index information based on it.

Effects of the Invention As is clear from the detailed description above, according to the present invention, it is possible to write part of the index information on an optical disk and reproduce the index information for searching documents at high speed. Therefore, it has a great effect in contributing to cost reduction of document file systems using optical disks.

Furthermore, since the index information can be managed only with the optical disk, there is no need to destroy the index information due to a failure in the auxiliary storage medium, which is the case in the past, and the reliability of the system is improved.

In addition, a method is adopted in which index information is written to the optical disk based on the number of keywords in the index information, so the creation time of index information can be kept within a certain amount of time, resulting in good operability. Party B can provide

[Brief explanation of the drawing]

FIG. 1 is a format diagram of an example of an optical disk for document files used in the present invention, FIG. 2 is a format diagram of an example of document management information, FIG. 3 is a format diagram of an example of index information, and FIG. 4 is a format diagram of an example of index information. FIG. 6 is a block diagram of a search device in a document file system to which the present invention is applied. FIG. 6 is a block diagram of a search device in a conventional document file system. FIG. 7 is a block diagram of a search device in a conventional document file system. FIG. 2 is a format diagram of a conventional optical disc for document files. 1... Optical disc control device, 2... Document input/output device, 3... Search device, 31...
...System interface unit, 32...Search control unit, 33-...Main memory, 4...System control device, 5...Storage area of optical disk,
51...-Document management information area, 52...
Document information area, 53... Index information area. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 5?

Claims (1)

[Claims] The storage area of the optical disc set in the optical disc control device is divided into a document information area, a document management information area, and an index information area, and when writing new document information in the document information area, at least Create document management information that includes a document number and keywords, and write this into the document management information area. Whenever the number of keywords in the document management information that has already been written increases to a predetermined number or more, a new document is created. When index information is created and added to the index information area and the optical disc is set in the optical disc device, the latest index information is obtained from the index information area and documents not included in this index information are For the document information in the information area, create index information based on the document management information corresponding to the document information in the document management information area, add and insert this into the latest index information in the index information area, A document file search method characterized in that index information is created for all document information registered in the document information area, and a search for document files is executed based on this index information.