JP2003122780A - Device and method for retrieving information and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently retrieve a Web page having electronic information which a user desires. SOLUTION: An information retrieving device 100 obtains a retrieval character string for retrieving electronic information which the user desires from a user terminal 20. A plurality of keywords for retrieving the Web page having electronic information is extracted from the obtained retrieval character string by referring to an index file 21. Then the information retrieving device 100 transmits a retrieval screen by which the user performs designation among the extracted keywords to the user terminal 20 via the Internet 30, generates a retrieval result list indicating the retrieval result of the obtained keyword when the keyword designated by the user is obtained from the user terminal 20 and, then, supplies the generated retrieval result list to the user terminal 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information retrieval device that assists a user in retrieving a Web page having electronic information desired by the user.

[0002]

2. Description of the Related Art In recent years, with the spread of the Internet, the Web as electronic information has passed through the Internet.
Pages are becoming easy to obtain. The user can obtain the desired Web page by
After inputting a search character string for designating a Web page on the search screen, the input search character string is transmitted to the search site. The search site searches for a candidate web page based on the received search character string and searches the searched web page.
Generate a list of pages (hereinafter referred to as a search result list) and provide it to the user. The user acquires a desired web page by referring to the search result list displayed on the user terminal and designating an arbitrary web page. By the way, W that has the desired electronic information using the search site
The method for searching the eb page includes (1) a search method using a search character string including a plurality of keywords (hereinafter referred to as a search character string), and (2) ANDing a large number of keywords selected by the user. There is a search method that combines the conditions.

(1) In the case of a search method using a search character string containing a plurality of keywords In the case of this search method, keywords are defined in advance, and a management number of a Web page containing the keywords in defined keyword units. And an index file that stores index data in which a URL (Uniform Resource Locator) for accessing the Web page is associated with each other is stored in advance in the information search device installed at the search site. When receiving the search character string from the user terminal, the information search device performs keyword analysis on the received search character string and automatically identifies the keyword. After that, the information search device refers to the index file for the specified keyword, and the We including the keyword
Generate a list of search results for page b.

(2) In the case of a search method in which a large number of keywords selected by the user are combined under an AND condition In the case of this search method, the information search device installed at the search site is used in the case of (1). It has the same index file as the search method. When receiving a large number of keywords selected by the user from the user terminal, the information search device refers to the index file and generates a search result list of Web pages including all of the received large numbers of keywords.

[0005]

[Problems to be Solved by the Invention] However, (1)
In the case of the search method, since the information search device installed at the search site causes the Web page that the user does not want to be displayed in the search result list, the user has the desired electronic information from the search result list. When browsing the Web page, there is a problem that the browsing efficiency is inevitable because the browsing action is unnecessary. In the search method in the case of (2), the information search device installed at the search site includes W including all of the keywords selected by the user.
Since the search result list of the eb page is displayed, there is an advantage that the search result list does not include a web page that the user does not want, but a web page having electronic information desired by the user is not displayed in the search result list. There was a problem.

In view of the above-mentioned problems, it is an object of the present invention to provide an information search device and the like which can efficiently search a Web page having electronic information desired by a user.

[0007]

An information retrieval apparatus according to a first aspect of the present invention is a retrieval character string obtaining means for obtaining a retrieval character string for retrieving electronic information desired by a user, and the retrieval character string. Keyword presenting means for presenting to the user the keyword extracting means for extracting a plurality of keywords for searching the electronic information from the search character string acquired by the column acquiring means, and the plurality of keywords extracted by the keyword extracting means Means, a keyword acquiring means for acquiring a keyword selected by the user among the keywords presented to the user, and a search instructing means for instructing a search by the keyword acquired by the keyword acquiring means. .

With such a configuration, a Web page having electronic information desired by the user can be efficiently searched.

[0009] A search result list generating means for generating a search result list showing a search result for a keyword designated by the search instructing means, and a search for providing the user with the search result list generated by the search result list generating means. Result providing means may be provided.

It is further characterized in that it further comprises a keyword registration means for registering the keyword, and the keyword extraction means extracts the keyword registered in the keyword registration means from the search character string.

The search data registration means for registering search data in which the keyword, the access information for accessing the electronic information of the keyword, and the information indicating the degree of coincidence of the electronic information are registered is provided, and the search is performed. The result list generation means is a read means for reading the search data for the keyword acquired by the keyword acquisition means from the search data registration means, and a search match based on the search data read by the read means. Generating means for generating the search result list displayed in descending order of frequency;
It may be provided.

In the information retrieval method according to the second aspect of the present invention, a retrieval character string for retrieving electronic information desired by a user is acquired, and the electronic information is retrieved from the acquired retrieval character string. Extracting a plurality of keywords for performing, presenting the plurality of extracted keywords to the user, acquiring a keyword selected by the user from the keywords presented to the user, and instructing a search by the acquired keyword , Is characterized.

With such a configuration, it is possible to efficiently search the Web page having the electronic information desired by the user.

It is also possible to generate a search result list showing search results for the designated keyword and provide the generated search result list to the user.

A keyword registered in advance may be extracted from the search character string.

The program according to the third aspect is a procedure for acquiring a search character string for searching electronic information desired by a user on a computer, and searching the electronic information from the acquired search character string. For extracting a plurality of keywords for, a procedure for presenting the extracted plurality of keywords to the user, a procedure for acquiring a keyword selected by the user among the keywords presented to the user, and a search by the acquired keyword. Perform the procedure to instruct.

With such a configuration, it is possible to efficiently search the Web page having the electronic information desired by the user.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. <First Embodiment> FIG. 1 is a block diagram showing the arrangement of an information retrieval apparatus according to the first embodiment of the present invention. As shown in FIG. 1, the information search device 10 according to this embodiment.
Reference numeral 0 is composed of a search processing device 1 and an external storage device 2, and these devices are connected to each other by a bus 3. The search processing device 1 includes a CPU 11, a storage unit 12,
The display unit 13, the input unit 14, and the transmission control unit 15 are provided, and these respective components are connected to the internal bus 16. The external storage device 2 includes an index file 21 and
And a search data file 22.

The CPU 11 constituting the search processing device 1 is
A search process described later is executed according to a control program including a WWW (Word Wide Web) program, an operation system (OS) program, various application programs for information retrieval, and the like.

The storage unit 12 includes a hard disk device and RA.
An M (Random Access Memory) is provided to store the control program. The storage unit 12 also includes a work area for temporarily storing the data generated by the CPU 11. The storage unit 12 also stores a search character string input to search for a web page desired by the user.
The storage unit 12 also searches for a keyword obtained by analyzing the search character string and the We searched for by this keyword.
A search result list showing search results for page b is stored.

The display unit 13 is a CRT (Cathode Ray Tub).
e) A liquid crystal display device is provided to display, for example, the operating state of the information search device of this embodiment. The input unit 14 includes a keyboard including input keys, and outputs, for example, an input signal for setting the operating state of the information search device of this embodiment to the CPU 11. The transmission control unit 15 includes the CPU 1
According to the control of No. 1, the data communication transmitted to and received from the user terminal 20 is controlled.

Index file 2 of external storage device 2
1 stores the keyword extracted from the search character string.
As shown in FIG. 1, the search data file 22 includes a keyword, a headline of a web page including the keyword, a URL for accessing the web page,
The search data associated with the score indicating the degree of coincidence of the Web page is stored. The score is the number of times a keyword appears TF (Term Frequency) in a web page and the number of times a web page containing this keyword appears DF.
It is a value calculated from (Document Frequency) using the following mathematical expression, and the higher the numerical value, the higher the matching degree of the Web pages.

## EQU1 ## SCORE = {1.0 + log ₁₀ (T
F)} × Log ₁₀ (NDOC / DF) Here, the “NDOC” is the number of Web pages to be searched.

The user terminal 20 comprises a CPU, an input unit, a display unit, a storage unit and a transmission control unit. The CPU executes processing according to the control program. The input unit includes a keyboard including input keys and the like, and outputs an input signal input by the key to the CPU 11.

The display unit displays the We received from the information retrieval device.
Display a display screen composed of page b. On the display screen, as shown in FIG. 2A, a search screen 200 for inputting a search character string desired to be searched, and as shown in FIG. 2B, a search screen 250 for selecting a keyword, As shown in FIG. 3, a search screen 30 displaying a list of search results
There is 0.

The search screen 200 is provided with a search character string input field 201 for inputting a search character string to be searched, and an "OK" button 202. The search screen 250 has a search character string display field 251 for displaying the input search character string.
And buttons 252 and 253 for designating the keywords “NTT data” and “NTT” extracted by the information search apparatus 100, an “OK” button 254, and a “cancel” button 255. Search screen 3 above
00 is a search character string display field 301 that displays the input search character string, and display fields 302 and 303 that indicate that the keywords “NTT data” and “NTT” extracted by the information search apparatus 100 have been designated. "OK" button 30
4, "Cancel" button 305, and search result list 3
It is equipped with 06. The search result list 306 is a list of Web pages including the keyword selected by the user from the plurality of keywords extracted by the information search device. The search result list 306 includes a headline display field 306A for the keyword selected by the user. The headline display column 306A includes a column 306a for displaying the keyword selected by the user, a column 306b for displaying the outline content of the Web page to be searched, and a column 306c for displaying the hit rate of this Web page.

The storage section stores the control program and also stores the Web pages constituting the search screens 200, 250, 300. The transmission control unit controls communication for sending and receiving data to and from the information search device.

Next, the information search device 100 of this embodiment.
The operation will be described with reference to the flowchart shown in FIG. In response to a user operation, the user terminal 20 sends an instruction to the information search device 100 to send a web page that forms a search screen for inputting a search character string.

When the information retrieval apparatus 100 receives an instruction from the user terminal 20 to transmit the Web page, the We configuring the retrieval screen 200 shown in FIG.
The page b is generated (may be generated in advance), and the generated web page is transmitted to the user terminal 20 (step S1).

When the user terminal 20 receives the web page, the user terminal 20 displays the search screen 200 including the web page on the display unit. When an arbitrary character string for specifying the Web page to be searched is input in the search character string input field 201 in the search screen 200 by the operation of the user, and then the "OK" button 202 is clicked, The user terminal 20 transmits the search character string input to the search character input box 201 to the information search device 100 via the Internet 30. In this example, the user
"T data" is input.

Upon receiving the search character string, the information search device 100 analyzes the keyword of the received search character example,
Index file 21 included in the search string
Extract the keywords stored in (step S
2). As mentioned above, the search string is "NTT data".
Then, as a keyword in the index file 21,
If "NTT" and "NTT data" are registered, the information search apparatus 100 will search for "NTT data" and "N" as keywords in the search character string "NTT data".
"TT". In addition, "NT", "data",
The presence of these characters is also detected if "," or the like is stored as a keyword in the index file 21.

The information search apparatus 100 generates a Web page that constitutes a search screen for designating the detected keyword, that is, the keyword extracted from the search character string,
The search character string is transmitted to the user terminal 20 that has transmitted it via the Internet 30 (step S3). In this example, the information search apparatus 100 is a Web forming a search screen 250 including buttons 252 and 253 for selecting one of the keywords “NTT data” and “NTT” as shown in FIG. 2B. A page is generated and the generated Web page is transmitted to the user terminal 20.

Upon receiving the Web page, the user terminal 20 displays the search screen 250 on the display unit. Search screen 2 displayed on the display unit by the user's operation
Button 25 for selecting keywords displayed in 50
When any of 2, 2, 253 is clicked and the “OK” button 254 is clicked, the user terminal 20 transmits to the information retrieval device 100 that the keyword selected by the clicked button has been designated. In this example, "N
Since the button 252 for designating “TT data” has been clicked and the “OK” 254 has been clicked, the user terminal 20 transmits to the information retrieval device 100 that “NTT data” has been designated. In addition, "Cancel" button 25
When 5 is clicked, the user terminal 20 retrieves information indicating that there has been no processing up to now, from the information retrieval device 10
Send to 0.

When the information retrieval apparatus 100 receives the keyword selected from the user terminal 20 via the Internet 30, the information retrieval apparatus 100 sequentially reads out all the retrieval data for the Web page including the received keyword from the retrieval data file 22, The search data of is stored in the work area of the storage unit 12 (step S4). In this example, the keyword “NT” is extracted from the search data file 22.
All search data for Web pages including "T data" are sequentially read, and these full-text search data are stored in the storage unit 1.
Store in 2.

Next, the information retrieval device 100 includes the storage unit 12
The full-text search data stored in the work area is sorted in descending order by score (step S5).

Subsequently, the information search apparatus 100 sequentially reads the search data sorted in descending order by the score, and forms the search screen 300 showing the search result list shown in FIG.
eb page is generated (step S6), and the generated Web
The page is transmitted to the user terminal 20 via the Internet (step S7).

The user terminal 20 receives the Web page and displays the search screen 300 shown in FIG. 3 on the display unit.
When the user terminal 20 clicks the heading column in the search result list displayed on the display unit by the user's operation, the Web page stored in the location designated by the URL linked to this heading column is displayed. The read web page is displayed on the display unit. In this example,
The user terminal 20 displays the index display column 30 of the score “95%” in the search result list displayed on the search screen in FIG.
When 6A is clicked by the user, the Web page of the clicked headline display field 306A is displayed on the display unit.

When the previously searched Web page is not desired by the user, the user reads the Web page having the desired electronic information by clicking in a different heading and clicking again.

According to the information retrieval apparatus 100 of this embodiment, the keyword registered in the index file 21 is referred to, and the retrieval character string received from the user
Since a plurality of keywords are extracted and the user specifies one keyword for search from the extracted keywords,
A web page having electronic information that the user does not want is not displayed in the search result list, and a web page having electronic information that the user desires can be efficiently searched.

<Second Embodiment> Although not shown, the information retrieval apparatus of the second embodiment has the same configuration as that of the information retrieval apparatus of the first embodiment. However, the information search device of this embodiment is different from the information search device of the first embodiment in that, of the plurality of keywords extracted from the search character string received from the user terminal 20, a plurality of keywords are designated by the user, Moreover, the search result list obtained by combining a plurality of designated keywords with AND or OR is transmitted to the user terminal 20.

For example, the information retrieval apparatus of this embodiment is
As shown in FIG. 5, as keywords extracted from the search character string “Western honeybee”, from the “Western”, “Dense”, and “Mitsumachi”, the keywords “Western” and “Mitsumachi” are displayed from the user terminal 20. Is selected, and when the user terminal 20 receives an instruction to display a search result list of Web pages combined with "AND" for the selected keywords "Western" and "Mitsubachi",
A web forming a search screen 400 displaying a search result list 407A in which “West” and “mitsubachi” are AND-combined.
The page is transmitted to the user terminal 20.

Information Retrieval Device 1 of First and Second Embodiments
In 00, the keyword analysis is performed by referring to the index file in which the keywords are registered in advance, but in addition to this, the search character string received from the user terminal 20 is registered in the dictionary file, for example. The words may be decomposed into the defined words and the decomposed words may be used as keywords.

[0042]

As described above, according to the present invention, a Web page having desired electronic information can be efficiently searched.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an information search device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a search screen displayed on a user terminal.

FIG. 3 is a diagram showing a search screen displayed on a user terminal.

FIG. 4 is a flowchart showing an operation of the information search device according to the first embodiment.

FIG. 5 is a diagram showing an example of a search screen generated by the information search device according to the second embodiment.

[Explanation of symbols]

100 information retrieval device 1 Search processing device 11 CPU 12 Memory 13 Display 14 Input section 15 Transmission control unit 2 External storage device 21 Index File 22 Search data file 20 user terminals 30 Internet

Claims (8)

[Claims] 1. A search character string acquiring unit for acquiring a search character string for searching electronic information desired by a user, and searching the electronic information from the search character string acquired by the search character string acquiring unit. For extracting a plurality of keywords for, a plurality of keywords extracted by the keyword extraction means, a keyword presenting means for presenting to the user, among the keywords presented to the user, the keyword selected by the user An information search apparatus comprising: a keyword acquisition unit that acquires the keyword; and a search instruction unit that instructs a search by the keyword acquired by the keyword acquisition unit. 2. A search result list generation means for generating a search result list showing a search result for a keyword designated by the search designation means, and a user are provided with the search result list generated by the search result list generation means. The information retrieval device according to claim 1, further comprising: 3. A keyword registration unit for registering the keyword is further provided, and the keyword extraction unit extracts the keyword registered in the keyword registration unit from the search character string. Alternatively, the information search device described in 2. 4. A search data registration means for registering search data in which the keyword, access information for accessing electronic information of the keyword, and information indicating a degree of coincidence of the electronic information are registered. The search result list generation means, based on the search data read by the read means for reading the search data for the keyword acquired by the keyword acquisition means from the search data registration means, based on the search data read by the read means 4. The information search device according to claim 2, further comprising: a generation unit that generates the search result list displayed in descending order of matching degree. 5. A search character string for searching electronic information desired by a user is acquired, a plurality of keywords for searching the electronic information is extracted from the acquired search character string, and a plurality of extracted keywords The information retrieval method, wherein the keyword is presented to the user, the keyword selected by the user is acquired from the keywords presented to the user, and a search by the acquired keyword is instructed. 6. The information search method according to claim 5, wherein a search result list showing search results for the designated keyword is generated, and the generated search result list is provided to the user. 7. The keyword registration means for registering the keyword is further provided, and the keyword extraction means extracts the keyword registered in the keyword registration means from the search character string. Alternatively, the information search method described in item 6. 8. A procedure for acquiring a search character string for searching electronic information desired by a user on a computer, and a procedure for extracting a plurality of keywords for searching the electronic information from the acquired search character string. A program for executing a procedure of presenting the extracted plurality of keywords to the user, a procedure of acquiring a keyword selected by the user among the keywords presented to the user, and a procedure of instructing a search by the acquired keywords.