JPH11306198A - Retrieval data base construction method, system therefor and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extract the important words, etc., from the files for construction of a retrieval data base by retrieving the punctuation symbols out of the character strings of the retrieved files, extracting the words which are held between the punctuation symbols and accumulating the extracted words for every retrieved file in the form of a retrieval data base. SOLUTION: This system includes a storage A which stores the information and a data processor B which operates under the control of a program. The storage A includes an input file storage part 1 which stores plural files to be retrieved, a key storage part 3 which stores the keys used for preparing a data base and a retrieval data base storage part 4 which stores the produced data. Meanwhile, the processor B includes a file type discrimination part 21 which discriminates the types of files which are read out of the part 1 and a word retrieval part 22 which retrieves and extracts the words based on the file types and the retrieval keys stored in the part 3. Thus, the processor B forms a retrieval data base production part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for constructing a search database and a system for constructing search data.
In particular, the present invention relates to a search database construction method, a search data construction system, and a recording medium capable of automatically extracting words.

[0002]

2. Description of the Related Art Conventionally, as a system for retrieving a file describing a specific word from a plurality of files, a method of retrieving all files by a specific word and a method of extracting important words of all files in advance are described. There is a method in which a database is prepared by using the above-mentioned word and searched.

A system for searching for a file describing a specific word from a plurality of files employs a search method that performs a full-text search-like process of searching all files for each file by a specific word. Then, the search processing becomes enormous, and a large processing time is required. Also, based on all the contents of all the files, all the words described are extracted in advance and stored as a database, and if a search method is used, it is necessary to store all the contents of the file as a database. Therefore, there is a problem that data for the total number of input files is required as a database, and there is a high possibility that the same word is registered twice in the same file. is there.

FIG. 9 relates to a method for creating a search database in which important words are extracted in advance and made into a database, and a specific word is searched for the extracted words.

A text file of a format in which a drawing number (sign) is added to a technical term as a document creation format is targeted, and a storage means 31 for storing the text file, and a user performs a keyword search on the storage means 31. In a database search device having keyword search means 32, a keyword automatic extraction means 33 for extracting a character string having a predetermined positional relationship with the code of the text file read from the storage means 31 as a keyword, There is provided a keyword file storage means 34 for storing the keywords extracted for each text file so that the detection means 32 can search. FIG. 10 is a diagram illustrating a correspondence relationship between a character string to which a code of a text file is assigned, the code, and an extracted word (keyword).

[0006]

In the method of creating a search database in the conventional database search apparatus shown in FIG. 9, words are limited to documents based on a document creation format in which drawing numbers (signs) are assigned. It is difficult to apply the method to an ordinary document creation style in which a code is rarely added to a document.

In the conventional search database creation method, when a file to be searched is of a type other than a text file such as an HTML file, a huge number of tags and codes accompanying words are distinguished. There is a problem that it is difficult to efficiently identify words due to no attachment, and it is also difficult to efficiently extract words according to the file type.

(Object of the Invention) An object of the present invention is to provide a search database construction method and a search data construction system capable of extracting important words and the like from a file and constructing a search database, and a recording medium storing a program. Is to provide.

Another object of the present invention is to store a search database construction method, a search data construction system, and a program which enable a search database to be constructed in a short time without causing data expansion. It is to provide a recording medium.

Another object of the present invention is to store a search database construction method, a search data construction system, and a program, which are capable of extracting important words and the like from various files and constructing a search database regardless of the file type. To provide a recording medium.

[0011]

According to the present invention, there is provided a search database construction method for extracting a search word from a plurality of search files to create a search database. Using, to search for a delimiter from the character string of the search file, to extract the word sandwiched by the delimiter,
It is characterized in that the extracted words are stored as a search database for each search file.

Also, the search data construction system of the present invention includes an input file storage unit for storing a plurality of search files, a key storage unit for storing a delimiter included in a character string of the search file, and a method for storing extracted words in a file. A search database storage unit for storing a search file read from the input file storage unit and the key storage unit, and extracting a word sandwiched by delimiters from a character string of the search file using delimiters. A search database creation unit that stores the search database in the database storage unit.

Further, the search data construction system of the present invention has a time stamp database for storing a time stamp of a search file every time a word is extracted, and the search database creation unit reads the search file read from the input file storage unit. The time stamp at the time of file creation is compared with the time stamp of the search file read from the time stamp database, and words are extracted from only the new search file or the updated search file.

Further, in the recording medium of the present invention, a file input process for inputting a search file, a file determination process for determining a file type of the search file, and a delimiter corresponding to the file type of the input search file are input. A delimiter input process, a delimiter search process for searching for a delimiter from the character string of the search file using the delimiter, a word extraction process for extracting a word sandwiched between the delimiters, A program for causing a computer to execute storage processing for accumulating as a search database for each search file is recorded.

(Operation) In the present invention, in order to search for a file in which a specific word is described from a plurality of files, important words in each file are extracted in advance and registered as a search database. When searching words, the search efficiency can be improved by searching the search database. As words to be extracted, words described in keywords of specific delimiters are treated as important words to be stored in the search database.

A symbol representing a delimiter is made into a database for each file type and is selected and used according to the file type.
Also, words are extracted from only the updated search file or the new search file using the time stamp database, and the search database is updated.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a search data construction system according to the present invention will be described in detail.

FIG. 1 is a block diagram showing the present embodiment. This embodiment includes a storage device A for storing information,
A data processing device B that operates under program control.

The storage device A includes an input file storage unit 1 for storing a plurality of files to be searched, and a key storage unit 3 for storing keys used when creating a database.
And a search database storage unit 4 for storing the created data.

The data processing device B searches for a word based on a search key from the key storage unit 3 based on the file type of the file, and a file type determination unit 21 for determining the type of the file read from the input file storage unit 1. The data processing device B constitutes a search database creation unit 2.

Next, the data stored in each storage unit of the storage device A and the processing of each unit in the processing device B will be specifically described.

The input file storage unit 1 stores documents in various formats such as Text (text), TeX, and HTML.

FIG. 2 is a diagram showing an example of a file stored in the input file storage unit 1. The document in the figure is a text file, and the file name is readme. txt.

In the key storage unit 3, a delimiter or the like serving as a key for specifying a word to be extracted when creating a search database is previously selected and stored for each file type.

FIG. 3 is a diagram showing a storage example of such keys for each file type. In the figure, for example, in the case of a text file, "", ""","
1. "," 2. …,…, Etc., and the words described before ″ ″ ″, ″ ″ ″, ″ line feed code ″,…, etc., respectively, are extracted. Select.

The search database storage unit 4 stores, as a search database, data that is referred to when performing a search and that describes data corresponding to words, file names, and file types.

FIG. 4 is a diagram showing an example of a search database. The search database is, for example, an ATM (word)-
readme. The data is stored as a database having an association such as txt (file name) -Text (file type).

Next, the file type determining section 21 and the word searching section 22 of the search database creating section 2 of the processing device B will be described.

The file type determination section 21 reads a file from the input file storage section 1, determines the file type, and outputs the file type to the word search section together with the read input file.

The word search unit 22 accesses the key storage unit 3 and, based on the file type information input from the file type determination unit 21, among the stored key data,
The key corresponding to the file type of the input file is extracted, the key of the input file is searched, the word stored in association with the key is extracted, the duplicate word is eliminated, and the extracted word is extracted. And the file type and file name of the input file are output to the search database storage unit 4 in a correspondence relationship.

The search database storage unit 4 stores the output from the word search unit 22 and constructs a search database.
FIG. 5 is a diagram illustrating another example of the search database.

Next, the operation of creating the search database according to the present embodiment shown in FIG. 1 will be described in detail with reference to FIGS. FIG. 6 is a flowchart showing the operation of the present embodiment.

The key storage unit 3 stores key data for each file type of various files in advance.
The user performs an operation of registering or deleting a key of the key storage unit 3 as appropriate when setting the search database.

The input file storage unit 1 stores a file or the like at the time of a user's daily document creation, and the file stored in the input file storage unit 1 is a file type determination unit 21.
Is output to

The file type determining section 21 determines the type of the input file, for example, Text
The file type and the content of the file are output to the word search unit 22 by determining which file type is the file or the HTML file (A1, A2 in FIG. 4).

The word search section 22 is a file type determination section 2
The key registered in the key storage unit 3 is searched from the file type and the file name supplied from 1 and the key for each file type used for word extraction stored in the key storage unit 3 is read out. Search for a key (Fig. 4
A3, A4). When the key is searched, a word accompanying the key is extracted from the file contents and output to the search database 4 (A5, A6 in FIG. 4).

As a specific example, an operation when the text file shown in FIG. 2 is given as an input file and the key shown in FIG. 3 is given as a key of the file will be described.

The file type determining section 21 determines that the input file is a text file, and outputs the file to the word searching section 22 (A1, A2 in FIG. 4).

The word search unit 22 determines the file type from the supplied file, and registers the first key registered as the key of the text file in the key storage unit 3, that is, "", "", "1. "," 2. ", ...
(A3, A4 in FIG. 4), and then an end key corresponding to the key, ie, "", "", ""
Searches for line feed codes “,..., Etc. As a result of the search,“ 1. ATM ”,“ ”(Cell)”, "2. Signal system" is specified.
Therefore, the word between the first key and the end key is output to the search database 4 together with the file name and file type of the file (A5, A6 in FIG. 4). As a result, the search database shown in FIG. 4 is created, and is used as a search database when searching for a file describing a specific word from a plurality of files.

(Other Embodiment) Next, another embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 7 is a block diagram showing a configuration of the present embodiment, and FIG. 8 is a flowchart showing an operation flow thereof. Referring to the figure, the present embodiment is different from the embodiment of FIG. 1 in that a time stamp comparing unit 21 and a time stamp database 3 are provided in addition to the embodiment shown in FIG.

The file stored in the input file storage unit 1 is usually provided with time stamp information when the file is created and updated.

The time stamp database storage unit 3 stores time stamp data when a search database is created for each file, and the database is updated each time a search database is created.

The time stamp comparing section 21 reads the time stamps when the input file is created and updated, compares the time stamps with the time stamp of the file in the type stamp database storage section 3, and ends the processing if they are the same. (A2, A3 in FIG. 8). If the time stamps are different, the file is regarded as newly created or updated, and the file type is determined, the key is specified, the key is searched, as in the embodiment shown in FIG.
A series of word extraction and database output processing is continued (A4, A5, A6, A7, A8 in FIG. 8).

As another embodiment of the present invention, a description will be given of an embodiment in which a computer performs processing for constructing a search database.

FIG. 9 is a diagram showing the present embodiment, and includes a recording medium 9 on which a search database construction program is recorded. As the recording medium 9, a magnetic disk, a semiconductor memory, a flexible disk and other recording media can be used.

The data processing device 10 reads a search database program from the recording medium 9 and executes a process of constructing a search database using the program. The processing performed by the data processing device 10 is as follows.

The various files input from the input device 11 or the files whose file types have been converted by the data processing device 10 are input file storage units 13 as search files.
1 is stored. Similarly, the delimiter for each file type is stored in the key storage unit 132. By a command from the input device or a regular activation in the data processing device 10,
The data processing device 10 sequentially reads the files of the input file storage unit 131, reads the delimiter of the key storage unit 132 corresponding to the type of the file, performs the above-described word extraction processing, and performs the search database storage unit 13
Store in 3.

By inputting a specific word from the input device 11,
When retrieving a file in which the word is described from a file in the input file storage unit 131, the data processing apparatus 10 uses the word to search the search database storage unit 13
3 is searched, the file name in which the matching word is described is read, the file in the input file storage unit 131 is specified and read from the file name, and the file is output to the output device 12 such as a display unit.

[0050]

According to the present invention, a word to be extracted is specified by using a symbol or the like in a file as a search key, and is registered in a database as search data together with a file name or the like. The number of registered words can be reduced, and the search database can be downsized.

By using the search database created according to the present invention, the data search time can be greatly reduced.

Also, using the time stamp data,
By extracting words only from the file updated during the search database creation processing, it is possible to reduce the time required to create the search database.

[0053]

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a search database creation system of the present invention.

FIG. 2 is a diagram illustrating an example of a target file from which a search word is extracted.

FIG. 3 is a diagram showing keys (delimiters) for each file type used for word extraction.

FIG. 4 is a diagram showing an example of a search database created from the file of FIG. 2;

FIG. 5 is a diagram showing another example of a search database.

FIG. 6 is a diagram showing an operation flow of the search database creation system of FIG. 1;

FIG. 7 is a diagram showing another embodiment of the search database creation system of the present invention.

8 is a diagram showing an operation flow of the search database creation system of FIG.

FIG. 9 is a diagram showing a search database creation system and a recording medium on which a computer program for constructing a search database is recorded according to another embodiment of the present invention.

FIG. 10 is a diagram showing a conventional database creation device.

FIG. 11 is a diagram illustrating a relationship between a character string, a code, and an extracted word of a file according to a conventional example.

[Explanation of symbols]

 Reference Signs List 1 input file storage unit 2, 5 search database creation unit 3 key storage unit 4 search database storage unit 6 time stamp database 9 storage medium 10 data processing device (CPU) 11 input device 12 output device 13 storage device 131 input file storage unit 132 Key storage unit 133 Search database storage unit 21 File type determination unit 22 Word search unit 31 Storage unit 32 Keyword detection unit 34 Keyword file storage unit 33 Automatic keyword extraction unit 51 Time stamp comparison unit 52 File type determination unit 53 Word search unit

Claims (6)

[Claims] 1. A search database construction method for extracting a search word from a plurality of search files to create a search database, comprising the steps of: And extracting a word sandwiched between the delimiters, and accumulating the extracted word as a search database for each search file. 2. The search database construction method according to claim 1, wherein a file type of the search file is determined, and words are extracted using a delimiter for each file type of the search file. 3. An input file storage unit for storing a plurality of search files, a key storage unit for storing a delimiter included in a character string of the search file, and a search database storage for storing extracted words as a database for each file. And a search file read from the input file storage unit and the key storage unit, and a search database created by extracting words sandwiched by delimiters from a character string of the search file by delimiters and storing the words in the search database storage unit And a search data construction system comprising: 4. The key storage unit stores a delimiter for each file type of a search file, and the search database creation unit has a file type discrimination unit, and performs the search for each file type of the search file. 4. The search data construction system according to claim 3, wherein words are extracted using a delimiter for each file type of the file. 5. A time stamp database for storing a time stamp of a search file each time a word is extracted, wherein the search database creation unit includes a time stamp at the time of creation of the search file read from an input file storage unit and the time stamp. 5. The search data construction system according to claim 3, wherein a word is extracted from only the new search file or the updated search file by comparing the time stamp of the search file read from the time stamp database. 6. A file input process for inputting a search file, a file determination process for determining a file type of the search file, a delimiter input process for inputting a delimiter according to the file type of the input search file, A delimiter search process for searching for a delimiter from the character string of the search file using a delimiter, a word extraction process for extracting words sandwiched by the delimiters, and using the extracted words as a search database for each search file A recording medium on which a program for causing a computer to execute a storage process to be stored is recorded.