JPS63254563A - Information retrieval system - Google Patents

Abstract

PURPOSE:To obtain a retrieval result economically in a short time by providing a retrieval processing means which controls a reading means when retrieval condition data is inputted from an input means and reads data satisfying the retrieval condition out of a CD-ROM. CONSTITUTION:This system includes a personal computer 5 which has a keyboard 1 for inputting retrieval conditions, a display 2 where the retrieval conditions are displayed, a retrieval processing part 3 which performs retrieval processing, and a CD-ROM player control part 4 and the CD-ROM 10 which has a CD-ROM player 6, a data control part 7, an index part 8, and a data part 9. When a retrieval condition is inputted from the input means 1, the retrieval processing means 3 controls the reading means to read the data satisfying the retrieval conditions among data stored in the CD-ROM 10. Consequently, data retrieval is performed economically at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information retrieval system for retrieving data stored in a storage medium, and in particular to a CD-ROM, which is a large-capacity storage medium that can be reproduced in large quantities at low cost. The present invention relates to an information retrieval system using ROM (compact disk read-only memory).

[Conventional technology]

Conventionally, this type of information retrieval system consists of a terminal that has a keyboard for inputting search conditions, a display that displays search results, and a line control unit, and a host computer that has a database and data search mechanism. By transmitting search conditions from the terminal to the host computer, a data search is performed in the host computer, and the search results are transmitted to the terminal via the communication line and displayed on the display.

(Problems to be Solved by the Invention) The above-mentioned conventional information retrieval system is an online information retrieval system that uses a communication line, so in a system where the number of searches and the amount of communication data associated with it is large, line costs and computer operation costs are high. There is a problem that the cost is high.Also, there is a problem that it takes a long time to obtain search results because the search processing is performed intensively on the host computer and communication time is required.

The present invention solves the above-mentioned problems, and its purpose is to make it possible to obtain search results economically and in a short time.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a CD-ROM storing search data, a reading means for reading the search data stored on the CD-ROM, and an input means for inputting search conditions. , search processing means for controlling the reading means to read data satisfying the search conditions from the CD-ROM when a search condition is input from the input means.

[For production]

When the search conditions are input from the input means, the search processing means
The reading means is controlled to read data that satisfies the search conditions from among the data stored in the CD-ROM.

〔Example〕 Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and shows a keyboard 1 for inputting search conditions. Display for displaying search results 2. Search processing unit 3 and CD-RO that perform search processing
A personal computer 5 having an M player control unit 4
, CD-ROM 7' layer 6, and database management section 7. A CD-R containing an index section 8 and a data section 9
OMl0.

FIG. 2 is a diagram showing an example of the data pace management section 7 of the CD-ROM 10, and FIG. 3 is a diagram showing an example of the index section 8 of the CD-ROM 10. FIG. 2 is a diagram showing an example of a data section 9, both of which are CD-R
This is for the case where a library catalog database is stored in OM10.

The data pace management unit 7 of the CD-ROM 10 has a function of managing information regarding all keys in the library catalog database, and includes an area 22 in which the type of key (item name that can be used as a keyword) is recorded; an area 23 in which a key length (item length of a keyword) is recorded; and a mask index section provided in the index section 8 corresponding to the type of key.

An index table section and an area 24 in which the start position of the address section are recorded are provided.

Next, taking as an example the case where the library catalog database shown in FIGS. 2 and 3 is stored in CD-ROM10, the first
The operation of the diagram will be explained.

When the CD-ROM 10 is set in the CD-ROM player 6, the search processing section 3 reads the contents of the data pace management section 7 via the CD-ROM player 6 and the CD-ROM player control section 4. As a result, the preparation for searching the library catalog data is completed, and the search processing section 3 enters a state of waiting for search condition input.

For example, if the operator wants to search for a book written by an author named Jiro Akagawa, the operator inputs the author's name as the keyword type using the keyboard 1, and inputs Jiro Akagawa as the keyword. When an author name is input as a keyword type, the search processing unit 3 searches the start position of the mask index unit 32 corresponding to the author name recorded in the index unit 8 based on the contents of the data pace management unit 7 that have been read in advance. d, and based on this starting position d, the index unit 8 to the CD-ROM player 6, CD-R
The mask index section 32 corresponding to the author's name is read via the OM player control section 4. In the mask index section 32, keywords recorded at the beginning of each block of the index table section 33 are recorded in ascending order. still,
In this example, one block is composed of three keywords.

The search processing unit 3 includes a mask index unit 32 corresponding to author names.
When ``Akagawa Jiro'' entered manually from the keyboard 1 is included in which block of the index table section 33 is included, based on the content and the start position e of the index table section 33 corresponding to the author name that has already been read. and read that block. In this case, since “Akagawa Jiro” is higher than “Einstein” and lower than “Akutagawa Ryunosuke”, the search processing unit 3 reads the block 35 corresponding to “Einstein” in the index table unit 33. Become. Next, the search processing unit 3 searches the read block 35 for an item 36 corresponding to "Akagawa Jiro" and displays on the display 2 the number of books written by "Akagawa Jiro". That is, each item in the index table section 33 includes:
Since the number of target data is recorded, the search processing unit 3
is based on item 36 corresponding to “Akagawa Jiro”,
I learned that there are three trees with “Akagawa Jiro” written on them,
This can be displayed on the display 2. In this way, the CD-ROM10 is stored in the mask index section 32.
By reading the data twice, once for block 35 and once for block 35, the number of target data can be displayed on display 2.

After displaying the number of target data on the display 2, the search processing unit 3 displays the target data corresponding to "Akagawa Jiro" on the display 2. That is, the address section 39 stores the position of the target data in the data section 9, and each item of the index table section 33 stores the position of the address section 39 for each item and the number of target data for each item. Therefore, the search processing unit 3 determines that the area for "Akagawa Jiro" in the address section 39 is the first position based on the item 36 corresponding to "Akagawa Jiro" and the start position f of the address section 39 corresponding to the author that has been read in advance. Knowing that these are the 6th, 7th, and 8th areas counting from f, based on the position information stored in these areas, three pieces of objective data related to "Akagawa Jiro" are read out from the data section 9 and displayed on the display 2. do.

The above-mentioned embodiment has been explained using an example in which a search is performed using one key, but the value of the address field is determined for each input key, and the logical sum, logical product, etc. of the determined address field values is performed. By searching the data section using , it is also possible to perform a compound search using a reversion key. Further, the data stored in the CD-ROM10 is not limited to the above-mentioned embodiments, but can be any data.

〔Effect of the invention〕

As explained above, the present invention stores search data on a CD-ROM that can be reproduced in large quantities at low cost, and
Since data that satisfies the search conditions is obtained by directly controlling the reading means such as a CD-ROM player without going through a communication line, it has the effect of being able to perform data searches economically and at high speed. . Therefore, it is preferable to apply the present invention to electronic publications with search functions such as encyclopedias.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing an example of the database management section 7, and FIG. 3 is a diagram showing an example of the index section 8 and the data section 9. It is a diagram. In the diagram, 1...Keyboard, 2...Display, 3...Search processing section, 4...CD-ROM player system? 1'U section, 5... personal computer,
6... CD-ROM player, 7... Database management section, 8... Index section, 9... Data section,
10...CD-ROM.

Claims (1)

[Claims] A CD-ROM in which search data is stored, and the CD-ROM.
reading means for reading search data stored in a ROM; input means for inputting search conditions; and data that controls the reading means and satisfies the search conditions by inputting the search conditions from the input means. an information retrieval system comprising: a retrieval processing means for reading the information from the CD-ROM.