JP3444592B2 - Document search device, query output device, document search method, query output method, and recording medium - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document search apparatus suitable for searching a document by giving a parameter to a search, obtaining a related word corresponding to the parameter from a keyword, and generating a query using these. Device, document search method,
The present invention relates to a query output method and a computer-readable recording medium in which a program for realizing these is recorded.

[0002]

2. Description of the Related Art With the development of WWW (World Wide Web) technology, a document search technology for searching a desired document from a large number of documents is becoming more and more important.

In such document retrieval, the following methods have been conventionally used. That is, the user specifies a keyword for searching for a desired document, or inputs a query specifying a condition for searching for a document in more detail.

Then, the document search engine obtains the number of times the keyword is included in the document and the matching degree between the document and the condition specified by the query by the vector space method.
The score of the document is calculated based on these.

Finally, documents with high scores are presented to the user in order as search results.

In the vector space method, a method of appropriately weighting a search keyword (hereinafter referred to as "term") included in a query, and a document included in a search range of a document search engine Each term extracted from the document (hereinafter referred to as "search term")
There is also proposed a method for accelerating score calculation by separately storing.

[0007]

However, if the specified keyword is not a prepared search term, there is a possibility that no significant result will be obtained as a search result.

On the other hand, it is troublesome for a general user to research such a search term in advance by himself, and there is also a possibility that an appropriate search term cannot be selected.

It is strongly desired that such a search term is automatically selected from keywords specified by general users.

A problem to be solved by the present invention is to give a parameter to a search, obtain a related word corresponding to the parameter from a keyword, generate a query by using these, and search a document.

[0011]

In order to solve the above-mentioned problems, a document search device according to a first aspect of the present invention includes a character string input receiving unit, a search parameter input receiving unit, a thesaurus unit, and a related word. It is configured to include an acquisition unit and a document search unit.

Here, the character string input receiving unit receives the input of the character string.

On the other hand, the search parameter input receiving unit receives the input of the search parameter.

Further, the thesaurus unit stores, for each of the plurality of character strings, one or more related character strings in association with the search parameter.

Then, the related word acquisition unit acquires, from the thesaurus unit, the related character string stored in association with the received character string with the received search parameter.

On the other hand, the document retrieving section retrieves a document from the received character string and the acquired related character string.

According to the present invention, a predetermined search term can be automatically acquired by a simple parameter specified by a general user, and a document can be searched appropriately by using these.

A query output device according to a second aspect of the present invention is a query given to a document search engine that obtains a document having a score obtained by applying a query including a term to a document within a predetermined range. Is output, a character string input reception unit, a term extraction unit, a search parameter input reception unit, a thesaurus unit, a related word acquisition unit, a query generation output unit,
To be provided.

Here, the character string input receiving unit receives the input of the character string.

On the other hand, the term extracting unit morphologically analyzes the received character string and extracts terms included in this.

Further, the search parameter input receiving section receives the input of the search parameter.

Then, the thesaurus section stores one or more related terms for each of the plurality of terms in association with the search parameters.

On the other hand, the related term acquiring unit acquires, from the thesaurus unit, the related terms stored in association with the received search parameters for each of the extracted terms.

Further, the query generation / output unit generates and outputs a query including the extracted terms and the acquired related terms for each of them.

According to the present invention, a query for automatically obtaining a predetermined search term from an ordinary sentence input by a general user with a simple parameter specified by the general user and performing a document search. Can be appropriately generated and output.

In the query output device of the present invention,
The generated query may be configured to weight the extracted term and the acquired related term by a predetermined weight associated with the received search parameter.

According to the present invention, each of predetermined search terms is weighted based on a parameter specified by a general user, and a query for searching a document in a range desired by the general user is appropriately generated. Can be output.

In the query output device of the present invention,
In the generated query, the weighting weight for the extracted term and the weighting weight for the acquired related term may be different from each other.

According to the present invention, when a search term is included in an ordinary text for search input by a general user, a query is made such that the weight of the search term is increased and the weight of the related terms is decreased. It can be generated and output appropriately.

A document retrieval device according to a third aspect of the present invention comprises the above query output device, a document retrieval engine section,
To be provided.

Here, the query output device outputs a query.

On the other hand, the document search engine unit acquires and outputs a document in which the score obtained by applying the output query to the document is within a predetermined range.

According to the present invention, a predetermined search term is automatically acquired from a normal text for search input by a general user by a simple parameter specified by the general user, and a document is searched by these. It can be done properly.

A document search method according to a fourth aspect of the present invention is configured to include a character string input reception step, a search parameter input reception step, a related word acquisition step, and a document search step.

Here, in the character string input receiving step, the input of the character string is received.

On the other hand, in the search parameter input receiving step,
Accept search parameter input.

Further, in the related word acquisition step, the received character string is received from the one or more related character strings stored in association with the search parameter for each of the plurality of character strings. The related character string stored in association with the search parameter is acquired.

Then, in the document search step, a document is searched by the received character string and the acquired related character string.

A query output method according to a fifth aspect of the present invention is a query given to a document search engine that obtains a document whose score obtained by applying a query including a term to a document falls within a predetermined range. And a character string input receiving step, a term extracting step, a search parameter input receiving step, a related word acquiring step, and a query generating and outputting step.

Here, in the character string input receiving step, the input of the character string is received.

On the other hand, in the term extracting step, the received character string is subjected to morphological analysis to extract the terms contained therein.

Further, in the search parameter input receiving step, the input of the search parameter is received.

Then, in the related word acquisition step, the received term is received for each of the extracted terms from one or more related terms stored in association with the search parameter for each of the plurality of terms. The related term stored in association with the search parameter is acquired.

On the other hand, in the query generation / output step, a query including the extracted terms and the acquired related terms is generated and output.

In the query output method of the present invention,
The generated query may be configured to weight the extracted term and the acquired related term by a predetermined weight associated with the received search parameter.

In the query output method of the present invention,
In the generated query, the weighting weight for the extracted term and the weighting weight for the acquired related term may be different from each other.

A document search method according to a sixth aspect of the present invention comprises a query output step and a document search engine step.

Here, in the query output step, the query is output using the above query output method.

On the other hand, in the document search engine process, a document having a score obtained by applying the output query to a document within a predetermined range is acquired and output.

A computer-readable recording medium according to a seventh aspect of the present invention causes a computer to function as a character string input reception unit, a search parameter input reception unit, a thesaurus unit, a related word acquisition unit, and a document search unit. It is configured to record the program to be performed.

Here, the character string input receiving unit receives the input of the character string.

On the other hand, the search parameter input receiving section receives the input of the search parameter.

Further, the thesaurus section stores one or more related character strings in association with the search parameters for each of the plurality of character strings.

Then, the related word acquiring unit acquires, from the thesaurus unit, the related character string stored in association with the received character string, in association with the received search parameter.

On the other hand, the document retrieving unit retrieves a document from the received character string and the acquired related character string.

A computer-readable recording medium according to an eighth aspect of the present invention obtains a document in which a score obtained by applying a query including a term to a document by a computer is within a predetermined range. It is configured to record a program that functions as a query output device that outputs a query given to the document search engine.

Here, the program causes the computer to function as a character string input reception unit, a term extraction unit, a search parameter input reception unit, a thesaurus unit, a related word acquisition unit, and a query generation output unit.

Here, the character string input receiving unit receives the input of the character string.

On the other hand, the term extracting unit morphologically analyzes the received character string and extracts terms included in this.

Further, the search parameter input receiving section receives the input of the search parameter.

Then, the thesaurus section stores, for each of the plurality of terms, one or more related terms in association with the search parameters.

On the other hand, the related term acquisition unit acquires, from the thesaurus unit, the related terms stored in association with the received search parameters for each of the extracted terms.

Further, the query generation / output unit generates and outputs a query including the extracted terms and the acquired related terms for each of them.

Further, the program recorded in the computer-readable recording medium of the present invention is, in the computer, the generated query is associated with the accepted search parameter by a predetermined weight, The extracted terms and the retrieved related terms may be configured to function to be weighted.

Further, the program recorded in the computer-readable recording medium of the present invention is, in the computer, in the generated query, weighting weight for the extracted term, and for the acquired related term. The weighting weights can be configured to function differently.

The program recorded on the computer-readable recording medium according to the ninth aspect of the present invention causes a computer to function as the above-described query output device and document search engine unit.

Here, the query output device outputs a query.

On the other hand, the document search engine unit acquires and outputs a document in which the score obtained by applying the output query to the document is within a predetermined range.

[0069]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Outline Configuration) FIG. 1 shows a typical information processing device (including a general-purpose computer, various terminals, mobile terminals, mobile phones, game machines, and other dedicated equipment) that functions as a query output device of the present invention. It is a schematic diagram which shows a schematic structure. Hereinafter, description will be given with reference to this figure.

The information processing apparatus 101 has a CPU (Central
Processing Unit (Central Processing Unit) 102. When the information processing apparatus 101 is powered on,
The CPU 102 has an IPL (Initial Program) stored in a ROM (Read Only Memory) 103.
Loader; initial program loader) is executed.

The IPL is the hard disk 104, FD
(Floppy Disk; FD, CD-ROM (Compac)
CD-ROM installed in the drive 111
OS (Operating System) stored in a recording medium such as
Operating system) A program that reads and executes a program.

After booting the OS, the CPU 102 is stored in the hard disk or the like according to the user's instruction input through the keyboard 105 or the mouse 106 or according to the contents of the setting file previously described in the hard disk or the like. Run the application program.

In a small-scale information processing device such as a mobile terminal, an embodiment in which the IPL itself functions as an OS and an application program can be adopted.

The CPU 102 uses a RAM (Random Access Memory) 107 as a temporary work storage area when executing a program. In addition, a register and a cache (not shown) provided in the CPU 102 are used as a temporary work storage area.

In order to report the result to the user and show the progress along with the execution of the program, the CPU 102
Can display the information on a display device 108 such as a liquid crystal display or a CRT (Cathode Ray Tube). In the instruction operation by the mouse 106, the cursor displayed on the screen is moved by moving the mouse 106, and the menu item pointed by the cursor can be selected by clicking the mouse 106.

The information processing apparatus 101 has a NIC (Network
Interface card, interface such as modem 10
9 can communicate with a computer communication network such as the Internet. It is possible to send a query to another server computer (document search engine) through the interface 109 and receive a search result sent as a response. It is also possible to execute the program received via the interface 109.

FIG. 2 is a schematic diagram showing a schematic configuration of each function when the information processing apparatus 101 functions as the query output apparatus and the document search apparatus of the present invention. Hereinafter, description will be given with reference to this figure.

The query output device 201 includes a character string input reception unit 202, a search parameter input reception unit 203, a thesaurus unit 204, a related word acquisition unit 205, and a query generation output unit 206.

Further, in the present embodiment, in order to allow the user to input a search keyword in an ordinary sentence,
A term extraction unit 207 is prepared. Note that in an embodiment in which the user inputs keywords in units of words or phrases,
It is not necessary to prepare the term extraction unit 207.

Further, in the present embodiment, the document search engine unit 208 for actually searching for a document by the query generated and output is prepared.

The character string input receiving unit 202 receives input of a character string representing a natural sentence for retrieval from the user. Therefore, the input device such as the keyboard 105 and the mouse 106 functions as the character string input receiving unit 202.

The term extraction unit 207 morphologically analyzes the given character string and extracts terms included in this. Therefore, the CPU 102 functions as the term extracting unit 207.

The search parameter input acceptance unit 203 indicates the result selected by the user as one of the five search parameters, such as "very loose search-slow search-normal search-tight search-very tight search". Accept input. Therefore, the input device such as the keyboard 105 or the mouse 106 is equivalent to the search parameter input acceptance unit 2
Function as 03.

The thesaurus unit 204 stores, for each term, one or more related related terms in association with each of the search parameters. Therefore, the ROM 103, the hard disk 104, the FDD 11
The FD installed in 0, the CD-ROM installed in the CD-ROM drive 111, and another computer connected via the interface 109 are the thesaurus section 204.
Function as.

The related word acquiring unit 205 receives, from the thesaurus unit 204, each of the terms obtained as a result of the morphological analysis based on the current search parameters.
Get related terms. Therefore, the CPU 102
It functions as the related word acquisition unit 205.

The query generation unit 206 includes a term extraction unit 20.
A query including the term extracted by 7 and the related term acquired by the related word acquisition unit 20 is generated and output. Therefore, the CPU 102 functions as the query generation output unit 206.

The document search engine unit 208 searches for a document by the generated and output query. Therefore, CP
U102 is a ROM 103 for storing these documents, a hard disk 104, an FD mounted on the FDD 110,
CD-ROM installed in the CD-ROM drive 111
It functions as the document search engine unit 208 in cooperation with.

Further, another computer connected through the interface 109, such as a WWW search server, functions as the document search engine unit 208. In this case, the parts other than the document search engine unit 208 function as the query output device 201.

As described above, the document search engine unit 208
And the query output device 201 are the same information processing device 10
It is possible to configure them on one or different information processing devices 101. However, from the viewpoint of load distribution and centralized management of the document database, it is desirable to separate them.

In addition, the hard disk 104, the FD installed in the FD drive 110, the CD-ROM installed in the CD-ROM drive 111, the ROM 103, and the RA
A CPU 102 is equivalent to the computer-readable information storage device such as M107 and another computer connected via the interface 109.
By recording the program executed in step 1, the program functions as the recording medium of the present invention.

As described above, the information processing apparatus 1 shown in FIG.
01 functions as the document search device 211 and the query output device 201 of the present invention shown in FIG. This is the query output device 201 and the document search device 2 of the present invention.
11 is an exemplary embodiment.

On the other hand, when the document search device 211 and the query output device 201 of the present invention are realized by a portable terminal or the like, a non-volatile semiconductor memory (flash memory card) or a battery backup is used as an external storage device. RAM can be used. In this case, the hard disk 104, FD drive 110, CD-R
The OM drive 111 or the like is not necessary.

(Document Retrieval Processing) FIG. 3 is a flowchart showing the procedure of the document retrieval processing when the information processing apparatus 101 shown in FIG. 1 is made to function as the document retrieval apparatus 211 of the present invention. Hereinafter, description will be given with reference to this figure.

First, the CPU 102 receives an input of a sentence indicating a search condition for specifying a document to be searched from the user (step S301). The user can input a natural sentence such as “Japanese-Chinese joint venture” as a search condition.

At this time, input of search parameters is also accepted (step S302). In the present embodiment, it is possible to input the ease of search to the tightness in five steps.

FIG. 4 is a display example of an input form that accepts both such text input and search parameter input.

The input form 401 is used for the information processing device 10.
No. 1 display device 108 is displayed. The user inputs a sentence to be used for the search in the sentence input field 402, and inputs the degree of looseness to the tightness of the search using the parameter slider 403. After inputting these, a search execution button 404 is used to instruct generation of a query and execution of document search.

Next, the CPU 102 morphologically analyzes the input character string and extracts terms included in this (step S303). In the case of the above input example, the result of the morphological analysis of terms is morphologically analyzed as "Japan / and / China / of / joint venture / company". Here, “/” indicates a morpheme delimiter. From this, "Japan", "China", and "joint venture / company" are extracted as terms.

If the term includes other terms, these terms are also extracted (step S304). Terms included in other terms are called "subterms". For example, the sub-terms of “joint venture / company” are “joint venture” and “company”.

Furthermore, related terms such as synonyms and synonyms of these terms and sub-terms (hereinafter referred to as "related terms")
Say. ) Is acquired using the thesaurus unit 204 (step S305). The thesaurus unit 204 stores various related terms according to how loose or tight the search parameters are.

In this embodiment, information on a certain term and related terms is stored in advance in the hard disk 104.
Etc. For example, as a related term of "Japan", for tight search, "Japan""Nippon"
"Japan", "Japan", etc. are stored. For the loose search, "East Asia", "Hokkaido", "Kyushu", "Shikoku", "Honshu", etc. are stored.

Further, the CPU 102 generates and outputs a query from the term, the part-of-speech information and the dependency information of the term obtained by the morphological analysis, and the search parameter (step S306).

The query generated here includes the following information. ·term. Includes sub-terms and related terms. -The weight of the term. It is used when calculating the score of a document by the vector space method.・ Required term information. Indicates whether the term is an essential term.

The method of determining the weight of terms and the essential term information will be described later.

The output destination is, for example, a RAM.
107 can be adopted.

Further, using the output query, an inquiry is made to the document search engine unit 208 (step S30
7) Then, this process ends. The details will be described later. In the present embodiment, the query output device 201 and the document search engine unit 208 are realized on the same information processing device 101 as described above, but they may be arranged on different information processing devices 101. Good.

(Example of Term) For example, when the user inputs “Japanese-Chinese joint venture”, the states of terms extracted or acquired are shown below.

When "tight search" is selected, a query is generated from the following extracted terms and related terms.・ Japan ・ Japan, Japan, Nippon ("Japan" related terms) ・ China ・ China, China ("China" related terms) ・ Joint venture

When "loose search" is selected, a query is generated from the following extracted terms and related terms.・ Japan ・ Japan, Japan, Japan (related terms of "Japan") ・ Hokkaido, Honshu, Kyushu, Shikoku (related terms of "Japan") ・ China (related terms of "China") ・ China (China) Related terms) ・ Guangzhou, Hong Kong, Macao ("China" related terms) ・ Joint ventures ・ Joint ventures ("Joint ventures" sub-terms) ・ Companies ("joint ventures" sub-terms)

As described above, by generating the search query using different terms based on the difference in the search parameters, it becomes easy to obtain the documents in the range desired by the user as the search results.

(Inquiry Processing) FIG. 5 is a flow chart showing the flow of inquiry processing for making an inquiry to the document search engine unit 208 arranged on a different information processing apparatus 101 using the output query.

The CPU 102 transmits the query output to the RAM 107 in step S307 to the document search engine unit 208 via the interface 109 (step S601).

The document search engine unit 208 receives the query (step S602), calculates the score of each document based on the query (step S603), and obtains a predetermined number of high-order documents (step S603). (S604), these are transmitted as a search result (step S605).

The CPU 102 has an interface 109.
The document of the search result is received via (step S60
6) display the document on the display device 108, or
The data is output to a storage device such as the RAM 107 or the hard disk 104 (step S607), and this processing ends.

As described above, the user can specify the search condition by inputting a natural sentence, and can obtain the search result included in the desired range by inputting the search parameter. .

(Determination of Weight) In the query generation unit 206 and step S306, a query is generated from a term, part-of-speech information or dependency information of the term obtained by morphological analysis, and a search parameter. To do.
Hereinafter, an example of a method for determining the term weight in this query will be described.

In Japanese, since the relation between nouns and compound nouns are often used, it is necessary to consider them also in the document search. Therefore, these are categorized as follows from the tendency of the search result, and the weight of each term is determined.

The first type is a concatenation of general nouns and general nouns (including a case where particles are continuous with a particle "no" in between. The same applies hereinafter).
This is the case. In this case, the common noun placed before is often the subject. For example, "meal / therapy"
In the case of “meal / no / therapy”, “golf / tournament”, and “golf / no / tournament”, the main subjects are “meal” and “golf”, respectively. Therefore, the weight of terms placed before these subjects are increased.

The second type is the case of terms containing subterms. When the meanings of subterms and terms are significantly different, the weight of the subterm is lowered and the weight of the entire term is raised. For example, "Regional / Bank""Job /
In the “Agreement,” the overall weight of these is increased, and the weight of “regional,” “bank,” “employment,” and “agreement” is lowered.

In the present embodiment, these weight determining methods are adopted, but heuristics for determining other weights can be adopted according to the results of research by natural language. Further, similar processing can be performed for other languages.

(Determination of Required Term Information) Query Generation Unit 2
In 06 and step S306, a query is generated from the term, the part-of-speech information and the dependency information of the term obtained by the morphological analysis, and the search parameter. Below, an example of a method of determining the essential term information in this query will be described.

Whether or not a required term is related to whether or not the term is a subject. Therefore, in the above type of weight determination, the term “increasing weight” can be made an essential term.

In the second type, the query may be created without using the sub-terms “region”, “bank”, “employment”, and “agreement”.

(Adjustment by Search Parameter) In this embodiment, the weight of the term and the essential term information are determined according to the search parameter input by the user. In the input form 401 shown in FIG. 4, a slider 403 can be used to input search parameters from "tight search" to "loose search" as values in several stages.

In the case of "tight search", the difference in height between weights is increased, or the proportion of essential terms is increased. on the other hand,
In the case of "loose search", reduce the difference in weight level,
Alternatively, reduce the proportion of mandatory terms.

For example, for “cheap / travel” (when the term placed later is the subject), “loose search”
The information included in the query is listed in order from to "tight search".・ "Cheap" is light weight, "Travel" is light weight ・ "Cheap" is light weight, "Travel" is heavy weight ・ "Cheap" is light weight, "Travel" is heavy weight and mandatory ・ "Cheap" is heavy weight Large, "Travel" is heavy and essential ・ "Cheap" is heavy and essential, "Travel" is heavy and essential

Further, in this embodiment, "tight search" is performed.
In the case of, the one stored as the related term for the tight search is adopted for each extracted term, and in the case of "loose search", the one stored as the related term for the loose search is adopted. To do. These can be weighted in the same manner as above. Further, the weight may be stored in the thesaurus unit 204 in advance.

The relationship between these search parameters and the generated query can be modified as appropriate, and modified embodiments are also included in the scope of the present invention.

[0130]

According to the present invention, a parameter is given to a search, a related word corresponding to the parameter is obtained from a keyword,
A document search device, a query output device, a document search method, a query output method suitable for generating a query by these and searching for a document, and a computer-readable recording medium recording a program for realizing these. Can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating a schematic configuration of a document search device of the present invention and a typical information processing device that functions as a query output device.

FIG. 2 is a schematic diagram showing a schematic configuration of each function of a document search device and a query output device of the present invention.

FIG. 3 is a flowchart showing a procedure of document search processing according to the present invention.

FIG. 4 is an explanatory diagram showing a display example of an input form.

FIG. 5 is a flowchart showing a procedure of inquiry processing according to the present invention.

[Explanation of symbols]

101 Information processing device 102 CPU 103 ROM 104 hard disk 105 keyboard 106 mice 107 RAM 108 display device 109 interface 110 FD drive 111 CD-ROM drive 201 query output device 202 Character string input reception part 203 Search parameter input acceptance section 204 Thesaurus 205 Related word acquisition unit 206 Query generation output unit 207 Term extractor 208 Document Search Engine Section 211 Document Retrieval Device 401 input form 402 text input field 403 Parameter slider 404 Search execution button

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-204978 (JP, A) JP-A-11-31156 (JP, A) JP-A-63-261424 (JP, A) JP-A-5- 324728 (JP, A) JP 10-26981 (JP, A) JP 2-245971 (JP, A) JP 2000-200281 (JP, A) Patent 3023943 (JP, B2) (58) Field (Int.Cl. ⁷ , DB name) G06F 17/30-17/30 419

Claims (15)

(57) [Claims] 1. A query output device for outputting a query to a document search engine that obtains a document whose score obtained by applying a query including a term to a document is a character string. A character string input accepting unit that accepts an input, a term extracting unit that morphologically analyzes the accepted character string and extracts terms included in the character string, a search parameter input accepting unit that accepts input of a search parameter, and a plurality of For each of the terms, a thesaurus unit that stores at least one related term in association with the search parameter; and from the thesaurus unit, associates with the accepted search parameter for each of the extracted terms. Related term acquisition unit for acquiring the related terms stored by the above, the extracted terms, and the acquisition for each of them. And a query generation output unit that generates and outputs a query including the related term, and the query generation output unit has a plurality of the extracted terms, and is related to a certain term and another term. If there is a relationship, or if one term contains another term,
The weights of these terms and the associated terms associated with each of them are assigned to the corresponding terms.
The dependency relationship or the term relates to another term
It is determined based on the relationship that includes
A query output device which is characterized by adjusting a search parameter to generate a query. 2. The query generation output unit, when there is a dependency relation between a certain term and another term, if the accepted search parameter is a predetermined value, the term with a larger weight is regarded as an essential term. The query output device according to claim 1, wherein the query is generated. 3. The query generation output unit, when a certain term includes another term, generates the query without including the other term if the accepted search parameter has a predetermined value. Claim 1 characterized by the above.
The query output device described in 1. 4. The query generation output unit generates a query using a value stored in advance in the thesaurus unit as a weight of the acquired related term. The query output device according to item. 5. The query output device according to claim 1, which outputs a query, and a score obtained by applying the output query to a document is included in a predetermined range. And a document search engine section for acquiring and outputting a document to be output. 6. A query output method for outputting a query given to a document search engine which obtains a document whose score obtained by applying a query including a term to a document, the character string. A character string input accepting step for accepting an input, a morphological analysis of the accepted character string, a term extracting step for extracting terms included in the character string, a search parameter input accepting step for accepting a search parameter input, From one or more related terms stored for each of the terms in association with the search parameter, the related terms stored for each of the extracted terms in association with the accepted search parameter are stored. A related word acquisition step of acquiring, the extracted terms, and the acquired related terms for each of them. A query generation output step of generating and outputting a query, wherein in the query generation output step, there are a plurality of the extracted terms, and there is a dependency relationship between a certain term and another term, or there is If the term contains other terms, the weights of these terms and their associated terms are
The dependency relationship or the term
It is decided based on the relationship including the
A query output method , which comprises adjusting the search parameters to generate a query. 7. In the query generation and output step, when a certain term and another term have a dependency relationship, if the accepted search parameter is a predetermined value, the term with a larger weight is regarded as an essential term. The query output method according to claim 6, wherein the query is generated. 8. In the query generating and outputting step, when a certain term includes another term, if the accepted search parameter has a predetermined value, the query is generated without including the other term. The query output method according to claim 6, wherein: 9. A query is generated in the query generation and output step, using a value stored in advance for each of the acquired related terms as its weight, to generate a query. Query output method described in. 10. A query output step of outputting a query using the query output method according to claim 6, and a query output step obtained by applying the output query to a document. And a document search engine step of acquiring and outputting a document whose score is included in a predetermined range. 11. A computer is operated as a query output device that outputs a query to a document search engine that obtains a document in which a score obtained by applying a query including a term to a document is within a predetermined range. A program, wherein the program causes the computer to perform a character string input acceptance unit that accepts a character string input, a term extraction unit that morphologically analyzes the accepted character string and extracts terms included in the character string, and a search parameter. A search parameter input receiving unit that receives an input of, a thesaurus unit that stores, for each of a plurality of terms, one or more related terms in association with a search parameter, for each of the extracted terms from the thesaurus unit. Related terms stored in association with the received search parameters are retrieved. And a related word acquisition unit that functions as a query generation output unit that generates and outputs a query including the extracted terms and the acquired related terms for each of the terms. Is a case where there are a plurality of the extracted terms and there is a dependency relationship between one term and another term, or when one term includes another term,
The weights of these terms and the associated terms associated with each of them are assigned to the corresponding terms.
The dependency relationship or the term relates to another term
It is determined based on the relationship that includes
A computer-readable recording medium on which a program is recorded, which is adjusted by a search parameter and is made to function so as to generate a query. 12. The computer-readable storage medium according to claim 12, wherein, in the computer, when the query generation output unit has a dependency relationship between a certain term and another term, if the received search parameter has a predetermined value, a weight is given. The recording medium according to claim 11, wherein the recording medium is made to function so as to generate the query, with an increased term as an essential term. 13. The program in the computer according to claim 13, wherein the query generation output unit includes another term if the accepted search parameter has a predetermined value when the term includes another term. The recording medium according to claim 11, wherein the recording medium is caused to function so as to generate the query. 14. The program in the computer, wherein the query generation output unit causes a function stored in the thesaurus unit to generate a query by using a value stored in advance in the thesaurus unit as a weight of the acquired related term. The recording medium according to any one of claims 11 to 13, which is characterized. 15. The query output device according to claim 1, wherein the computer outputs a query, and a score obtained by applying the output query to a document is predetermined. A computer-readable recording medium having a program recorded thereon, which is characterized by causing it to function as a document search engine unit for acquiring and outputting documents included in the range.