JP5068338B2 - Search server, system and method - Google Patents

Description

  The present invention relates to a search server, a system, and a method.

  When a search server having an index database or an archive database of web pages responds to the terminal that sent the query, the search server performs a search process such as an index search or a full-text search, A plurality of high Web pages are specified, and a list of the specified Web pages is returned to the terminal. The list of Web pages is accompanied by a summary sentence (hereinafter referred to as “snippet”) composed of an outline of the Web page, a sentence fragment including the hit query, and the title and URL of each Web page. Is done. As a result, even if it is not sufficient to display only the title or URL when guessing which Web page contains the information that the user wants to obtain, the text, phrase, or image of the snippet is displayed. It can be supplemented by browsing thumbnails.

  Conventionally, when generating a snippet, there is a method of uniformly extracting a specific number of characters from the top of a Web page specified by a search server. However, since there are many cases where the outline cannot be grasped only by the description at the beginning of the sentence, the user can obtain sufficient information even if the snippet is presented to the user only by extracting the sentences uniformly from the top of the Web page. There may not be.

  As a technique for solving such a problem, it has been proposed to classify snippets into four types and generate snippets of appropriately selected types according to user operations (see, for example, Non-Patent Document 1). . According to this method, even if the web page specified by the server is the same, the expression of the snippet can be made different depending on the type of snippet selected by the user. Therefore, unlike the snippet generated by a uniform method, There are cases where the user can use different types of snippets depending on the purpose of the search.

  As an application example of the technique shown in Non-Patent Document 1 described above, a user inputs a query “Kyoto” and “Yudofu” and the search server specifies a Web page corresponding to these “Kyoto” and “Yudofu”. explain. For example, the user can independently use information obtained from each Web page specified by the search server by hitting the query, and type I of four types, and only a fragment including the query. A case where the types to be aggregated are selected will be described. In this case, for each Web page specified by the search server itself, the search server will say “If you eat yudofu in Kyoto, XX is recommended” or “In Kyoto xx, you will find Arimayama's □□. Generate a snippet that summarizes the surrounding information including the query entered as a clue, such as “Tofu at the store”. On the other hand, when the user selects type III among four types, that is, a type that uses information obtained from a set of a plurality of Web pages specified by the search server and aggregates only fragments including a query. explain. In this case, the search server generates, for the same Web page, a snippet that extracts a fragment including a characteristic part that does not exist in other Web pages, such as “Only our shop can eat XX in Kyoto”. . As a result, the user can approach the desired information more efficiently by using different snippet generation methods according to the purpose of the search.

Journal of the Database Society of Japan, Japan, Database Society of Japan, Vol. 6, No. 2, 33-36, September 28, 2007

  However, this technique has a problem that the user has to select the type by himself. Therefore, it is required to provide a search server that can estimate the user's search intention and automatically switch the snippet generation method without relying on the user's selection operation.

  An object of the present invention is to provide a search server, a system, and a method capable of estimating a user's search intention and automatically switching a snippet generation method without depending on a user's selection operation.

  The present invention provides the following solutions.

  (1) Query receiving means for receiving a query from a terminal, search means for searching and specifying a Web page having a high degree of association with the query, and contents of the Web page specified by the search means, If the number of the same words, synonyms or synonyms included in the number of Web pages in common is determined to be fixed when the number is equal to or greater than the upper limit reference number, and the determination means determines that the number is fixed Snippet generation means for generating a snippet by reducing the number of lists of snippets displayed at a time as a search result as compared to a case where the list is not determined to be fixed and increasing the number of characters per snippet constituting the list And a snippet transmission that transmits the snippet generated by the snippet generation means to the terminal together with the list Search server and a stage.

  According to the invention described in (1), the determination unit refers to the content of the Web page specified by the search unit, and the number of identical phrases, synonym phrases, or synonym phrases that are commonly included in a predetermined number of Web pages. Is determined to be fixed when the number is equal to or greater than the upper reference number, and the snippet generation means determines the number of snippet lists to be displayed at once as a search result when the determination means determines that it is fixed. The snippet is generated by decreasing the number of characters per snippet constituting the list and increasing the number of characters. Then, the snippet transmission means transmits the snippet generated by the snippet generation means together with the list to the terminal. Thereby, although the number of lists is small on the display screen of the user terminal, the information amount of each snippet can be made rich. Therefore, by browsing a snippet with a large amount of information, the user is not only more likely to reach a desired web page more accurately, but also only by browsing the snippet without referring to the web page in the end. It can also be expected that desired information can be obtained. In this way, it is possible to provide a search server that can estimate the user's search intention and automatically switch the snippet generation method without depending on the user's selection operation.

  In addition, when the user can obtain desired information only by the page displaying the snippet, the page displaying the snippet may be browsed for a longer time than before, and the printing frequency of the page is increased. there is a possibility. In such a case, there is also an effect that the value of the advertisement attached to the page displaying the snippet is increased.

  (2) The server according to (1), wherein the determination unit further has a number of identical phrases, synonyms or synonyms included in the predetermined number of Web pages in common not more than a lower limit reference number. The snippet generation means increases the number of snippet lists to be displayed at a time and decreases the number of characters per snippet constituting the list. The same phrase, synonym phrase, or synonym phrase that is commonly included in the Web pages included in the list increased in number is extracted only once from the top, and the characteristic words of the Web page included in the list are further extracted. A search server that extracts more than the case where it is not determined to be variable and generates a snippet using these extracted phrases.

  According to the invention described in (2), the search server allows the user who browsed the snippet to browse the phrase included in the web page included in the list increased in number only once, and further, the web You can browse the feature words of the page. Therefore, when a query that hits various topics is input, the user can obtain a wide range of information just by looking at the snippet while suppressing the possibility of browsing the same phrase or topic multiple times. As a result, the user who viewed the snippet may be able to grasp the outline of the desired information without directly viewing the contents of the linked web page, in which case the user clicks on the link destination. There is no need to browse. In this way, it is possible to provide a search server that can estimate the user's search intention and automatically switch the snippet generation method without depending on the user's selection operation.

  (3) A system including a terminal that transmits a query and a search server that responds to the query, wherein the terminal includes query transmission means for transmitting a query, and the search server includes: A query receiving means for receiving the query, a search means for searching and specifying a Web page having a high degree of association with the query, and a predetermined number of Web pages by referring to the content of the Web page specified by the search means Determining means that determines that the number of the same phrase, synonym phrase, or synonym phrase that is included in common is greater than or equal to the upper limit reference number, and if the determination means determines that the number is fixed, Compared to the case where it is not determined, the number of snippet lists displayed as search results at one time is reduced, and the snippets constituting the list are A snippet generating means for generating a snippet by increasing the number of characters of the snippet, and a snippet transmitting means for transmitting the snippet generated by the snippet generating means together with the list to the terminal. A system further comprising snippet display means for displaying the transmitted snippet together with the list.

  (4) A method in which a search server responds to a terminal that has transmitted a query, wherein the search server searches for a Web page that has a high degree of relevance between the query receiving step of receiving a query from the terminal and the query. The number of the same words, synonyms or synonyms included in a predetermined number of Web pages is greater than or equal to the upper limit reference number with reference to the search step specified and the content of the Web page specified in the search step. If the determination step is determined to be fixed, and the determination step determines that it is fixed, the number of snippet lists displayed as search results at a time is reduced as compared to the case where the determination is not fixed. In addition, a snippet generation process for generating a snippet by increasing the number of characters per snippet constituting the list, and the snippet generation process Methods including snippets transmission step of transmitting to the terminal a pet with said list.

  According to the system described in (3), the same effect as in (1) can be expected by implementing the invention relating to the system. According to the method described in (4), the same effect as in (1) can be expected by implementing the invention according to the method.

  According to the present invention, it is possible to provide a search server, a system, and a method that can estimate a user's search intention and automatically switch a snippet generation method without depending on a user's selection operation.

It is a figure which shows the whole structure for demonstrating the system 1 which concerns on this embodiment. It is a figure which shows index DB31 concerning this embodiment. It is a figure which shows archive DB32 which concerns on this embodiment. It is a flowchart of the search server 3 which concerns on this embodiment. It is a flowchart of the fixed / variation determination process by the search server 3 according to the present embodiment. It is a flowchart of the snippet production | generation process by the search server 3 which concerns on this embodiment. It is a figure which shows the example of a display of a snippet when a query is "XX tower." It is a figure which shows the example of a display of a snippet in case a query is "what is a three square theorem." It is a figure which shows the example of a display of a snippet when a query is "XX office news".

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[overall structure]
FIG. 1 is a diagram showing an overall configuration for explaining a system 1 and a search server 3 according to the present embodiment. The system 1 includes a terminal 2 that transmits a query and a search server 3 that responds to a query received from the terminal 2.

  First, the configuration of the search server 3 will be described. The search server 3 includes a control unit 20 and a storage unit 30. The control unit 20 is a part that comprehensively controls each function related to the search server 3, and includes a query reception unit 21, a search unit 22, a determination unit 23, a snippet generation unit 24, and a snippet transmission unit. On the other hand, the storage unit 30 is a part that stores various programs (not shown) and a database (hereinafter referred to as “DB”) for functioning as the search server 3, and includes an index DB 31 and an archive DB 32.

  The query receiving unit 21 is a part that receives a query from the terminal 2 and functions as a query receiving unit.

  The search unit 22 refers to the index DB 31 in which the contents of the Web site are stored in advance, and searches for and specifies a Web page having a high degree of association with the query received by the query receiving unit 21, and functions as a search unit. To do.

  For example, as described in International Publication No. 2002/044946, the index DB 31 is a database constructed by extracting URLs and keywords of Web pages acquired by a patrol robot called a crawler. The crawler refers to a program that collects Web pages stored in any Web server in the world in order to create the index DB 31. The index DB 31 is exemplified in FIG. 2 and includes a “URL” field indicating a URL for connecting to a website accessed by the crawler and an “index keyword” field indicating a keyword extracted from the website.

  Returning to FIG. 1, the determination unit 23 refers to the content of the Web page specified by the search unit 22, and the search result is determined according to the number of identical phrases, synonyms or synonyms included in a predetermined number of Web pages. This is a part for determining whether it is fixed, variable, or intermediate, and functions as a determination means. The “predetermined number” is the number of snippet lists to be displayed on the terminal 2 at once (for example, on one page) as a search result when the search result is intermediate. In the present embodiment, the “predetermined number” is “10”, but is not limited thereto.

  The determination unit 23 determines that the number is the same when the number of the same phrase, synonym phrase, or synonym phrase that is commonly included in the predetermined number of Web pages is equal to or greater than the upper limit reference number. In the present embodiment, the upper limit reference number is “20”, but is not limited to this.

  The determination unit 23 determines that the number of the same words, synonyms or synonyms included in a predetermined number of Web pages in common is not more than the lower limit reference number. In the present embodiment, the lower limit reference number is “5”, but is not limited to this.

  And the determination part 23 determines as intermediate | middle, when the number of the same phrase, synonym phrase, or synonym phrase contained in common in a predetermined number of Web pages is not more than an upper limit reference number, and is not less than a lower limit reference number. . Note that the upper limit reference number and the lower limit reference number are not prevented from being the same, and in that case, the determination unit 23 determines whether the number is variable or fixed.

  The determination unit 23 determines whether the search result is fixed, variable, or intermediate with reference to the archive DB 32.

  The archive DB 32 is a database that stores Web page contents received by executing a program called a crawler or a feeder. A feeder refers to a program that inputs data of a Web page that does not need to be collected by a crawler to the archive DB 32, such as a Web server that is operated by itself or a Web server that is operated by a partner. The archive DB 32 is exemplified in FIG. 3 and includes a “URL” field indicating a URL for connecting to a Web site and a “content” field indicating the content of the Web site.

  Returning to FIG. 1, if the determination unit 23 determines that the determination unit 23 is fixed, the snippet generation unit 24 sets the number of snippet lists to be displayed on the terminal 2 as a search result at one time (for example, on one page) from “10”. The snippet is generated by decreasing the number to “3” and increasing the number of characters per snippet constituting the list from “100” to “300”. Further, when the determination unit 23 determines that the snippet generation unit 24 is variable, the snippet generation unit 24 changes the number of snippet lists to be displayed on the terminal 2 at once (for example, on one page) as a search result from “10” to “20”. In addition, the number of characters per snippet constituting the list is decreased from “100” to “50”, and the number is increased to “20”, and the same phrase included in the Web pages included in the list The synonym phrase or synonym phrase is extracted only once from the top, and more characteristic words of the Web page included in the list are extracted than when not determined to be variable, and these extracted phrases are used. Generate a snippet. The snippet generator 24 functions as a snippet generator.

  The snippet transmission unit 25 transmits the snippet generated by the snippet generation unit 24 to the terminal 2 together with the list. The snippet transmission unit 25 functions as a snippet transmission unit.

  The control unit 10 of the terminal 2 includes a snippet display unit 12 that displays the snippet transmitted by the snippet generation unit 24 together with a list. The snippet display unit 12 functions as a snippet display unit.

[Hardware and Software Configuration of this Embodiment]
The hardware and software configurations of this embodiment will be described. The hardware of the terminal 2 and the search server 3 includes a storage device (storage unit), a communication device (communication unit), a display device (display unit), and an input device (input unit) in addition to a CPU as a control device (control unit). ) Is included. Examples of the storage device (storage unit) include a memory (RAM, ROM, etc.), a hard disk drive (HDD), an optical disk (CD, DVD, etc.) drive, and the like. Examples of the communication device (communication unit) include various wired or wireless interface devices. Examples of the display device (display unit) include various displays such as a liquid crystal display or a plasma display. Examples of the input device (input unit) include a keyboard, a pointing device (such as a mouse), a remote control device, and the like.

  The software of the terminal 2 and the search server 3 includes programs and data for controlling the hardware. Programs and data are stored in a storage device (storage unit), and are appropriately executed and referenced by a control device (control unit). Further, the computer program and data can be distributed by an electromagnetic method, or can be recorded and distributed on a computer-readable medium such as a CD-ROM.

[flowchart]
4 to 6 are flowcharts of the search server 3 according to the present embodiment.

  In step S <b> 1, the query receiving unit 21 executes a query receiving process for receiving a query from the terminal 2. In step S <b> 2, the search unit 22 refers to the index DB 31 in which the index keywords of the Web site are stored in advance, and searches for and specifies a Web page having a high degree of association with the query received by the query receiving unit 21. Execute.

  In step S3, the determination unit 23 executes a fixing / variation determination process which will be described later with reference to FIG. In step S4, the snippet generator 24 executes a snippet generation process which will be described later with reference to FIG. In step S5, the snippet transmission unit 25 executes a snippet transmission process in which the snippet generation unit 24 transmits the snippet generated by executing the snippet generation process together with the snippet list to the terminal 2, and ends the series of processes.

  FIG. 5 is a flowchart of fixed / variation determination processing according to the present embodiment.

  In step S <b> 11, the determination unit 23 refers to the archive DB 32 and counts the number of the same words / synonyms / synonyms / phrases included in common in the 10 Web pages specified by the search unit 22.

  In step S12, the determination unit 23 determines whether the number counted in step S11 is 20 or more. When this determination is YES, the determination unit 23 moves the process to step S13, and when NO, the determination unit 23 moves the process to step S14. In step S13, the determination unit 23 determines that the search result is fixed, and ends the fixed / variation determination process.

  In step S14, the determination unit 23 determines whether or not the number counted in step S11 is 5 or less. When this determination is YES, the determination unit 23 moves the process to step S15, and when NO, the determination unit 23 moves the process to step S16. In step S15, the determination unit 23 determines that the search result is variable, and ends the fixing / variation determination process. In step S16, the determination unit 23 determines that the search result is intermediate, and ends the fixing / variation determination process.

  FIG. 6 is a flowchart of snippet generation processing according to the present embodiment.

  In step S <b> 21, the snippet generation unit 24 determines whether the determination unit 23 determines that it is fixed. When this determination is YES, the snippet generation unit 24 moves the process to step S22, and when NO, the snippet generation unit 24 moves the process to step S24.

  In step S22, the snippet generation unit 24 decreases the number of snippet lists to be displayed on the terminal 2 as a search result at once (for example, on one page) from “10” to “3”. In step S23, the snippet generation unit 24 increases the number of characters per snippet constituting the list from “100” to “300”.

  In step S24, the snippet generator 24 determines whether or not the determination unit 23 has determined that it is variable. When this determination is YES, the snippet generation unit 24 moves the process to step S25, and when NO, the snippet generation unit 24 moves the process to step S29.

  In step S25, the snippet generation unit 24 increases the number of snippet lists to be displayed on the terminal 2 as a search result at once (for example, on one page) from “10” to “20”. In step S26, the snippet generation unit 24 reduces the number of characters per snippet constituting the list from “100” to “50”. In step S27, the snippet generation unit 24 extracts the same phrase, synonym phrase, or synonym phrase included in common in the Web pages included in the list whose number is increased to “20” from the top only once. In step S28, the snippet generation unit 24 extracts more feature words of the Web page included in these 20 lists than when it is not determined to be variable.

  In step S29, the snippet generation unit 24 generates a snippet and ends the snippet generation process.

[Example of system 1 according to this embodiment]
7-9 is a figure which shows the example of a display on the screen 40 of the terminal 2 when the system 1, the search server 3, and method which concern on this embodiment are implemented. More specifically, FIG. 7 is a diagram illustrating a display example of a snippet when the query is “XX tower”. FIG. 8 is a diagram illustrating a display example of a snippet when the query is “What is the three-square theorem”? FIG. 9 is a diagram illustrating a display example of a snippet when the query is “XX office news”.

  Hereinafter, FIGS. 7 to 9 will be described in detail.

  First, FIG. 7 will be described. The query receiving unit 21 receives a query “XX tower” from the terminal 2. Then, the search unit 22 refers to the index DB 31 illustrated in FIG. 2, searches for a Web page having a high degree of association with the query “XX tower” received by the query reception unit 21, and reads “http: www.jkl”. ... ”,“ Http: www.mno .... ”,“ http: www.pqr. Subsequently, the determination unit 23 stores the web pages “http: www.jkl....”, “Http: www.mno....”, Which are stored in the archive DB 32 illustrated in FIG. . ”,“ Http: www.pqr .... ”, etc., whether the search result is fixed depending on the number of the same phrases, synonyms or synonyms included in 10 Web pages in common Determine if it is variable or intermediate. When the query is “XX tower”, “XX tower”, “sightseeing” and the like correspond to the same phrase, synonym phrase or synonym phrase. Here, the determination unit 23 does not have the number of the same words, synonyms or synonyms included in the predetermined number of Web pages in common not more than 20 which is the upper limit reference number and not less than 5 which is the lower limit reference number. The description will be made assuming that it is determined as intermediate.

  Since the determination unit 23 determines that the determination unit 23 is intermediate, the snippet generation unit 24 sets the number of snippet lists to be displayed on the terminal 2 as a search result at once (for example, on one page) as “10”, and the list is displayed. A snippet is generated by setting the number of characters per snippet to be “100”. Then, the snippet transmission unit 25 transmits the snippet generated by the snippet generation unit 24 to the terminal 2 together with the list.

  FIG. 7 is a display example on the screen 40 at this time. A query input unit 41 for inputting a query is provided at the upper left of the screen 40, and the query input unit 41 displays “XX Tower”. And below the query input part 41, “Web search result” is displayed, the search condition is “XX tower”, about 1 million results were obtained under this search condition, the search result The number of snippets displayed on the terminal 2 at one time (for example, on one page) is “10”. Each search result shows a snippet of 100 characters that summarizes the contents of the archive DB 32.

  Next, FIG. 8 will be described. The query receiving unit 21 receives a query “What is the three-square theorem” from the terminal 2. Then, the search unit 22 refers to the index DB 31 illustrated in FIG. 2 and searches for a Web page having a high degree of association with the query “What is the three-square theorem” received by the query reception unit 21. "www.abc ....", "http: www.def ....", "http: www.ghi ....", etc. Subsequently, the determination unit 23 stores the web pages “http: www.abc....”, “Http: www.def ....” specified by the search unit 22, which are stored in the archive DB 32 illustrated in FIG. . ”,“ Http: www.ghi .... ”, etc., whether the search result is fixed depending on the number of the same phrases, synonyms or synonyms included in 10 Web pages in common Determine if it is variable or intermediate. When the query is “what is the three-square theorem”, “right triangle”, “three-square theorem”, “Pythagoras”, etc. are equivalent phrases, synonyms or synonyms. Here, it is assumed that the determination unit 23 determines that the number of identical phrases, synonym phrases, or synonym phrases that are commonly included in a predetermined number of Web pages is 20 or more that is the upper limit reference number, and that the search result is fixed. explain.

  Since the determination unit 23 determines that the snippet generation unit 24 is fixed, the number of snippet lists to be displayed on the terminal 2 as a search result at once (for example, on one page) is set to “3”. A snippet is generated by setting the number of characters per snippet to be “300”. Then, the snippet transmission unit 25 transmits the snippet generated by the snippet generation unit 24 to the terminal 2 together with the list.

  FIG. 8 is a display example on the screen 40 at this time. The query input unit 41 displays “What is the three-square theorem?”. As the “web search result”, the search condition is “what is the three-square theorem”, about 150,000 results are obtained under this search condition, and the search result is sent to the terminal 2 at once (for example, This indicates that the number of snippet lists to be displayed is “3” on one page. Each search result includes a 300-character snippet that summarizes the contents of the archive DB 32.

  Next, FIG. 9 will be described. The query receiving unit 21 receives a query “XX office news” from the terminal 2. Then, the search unit 22 refers to the index DB 31 illustrated in FIG. 2, searches for a Web page having a high degree of association with the query “XX office news” received by the query reception unit 21, and reads “http: www .Stu .... "," http: www.vwx .... "," http: www.yz .... ", etc. Subsequently, the determination unit 23 stores the web pages “http: www.stu....”, “Http: www.vwx....”, “Http: www.vwx....”, Which are stored in the archive DB 32 illustrated in FIG. . ”,“ Http: www.yz.... ”, Etc., and whether the search result is fixed depending on the number of the same phrases, synonyms or synonyms included in 10 Web pages in common Determine if it is variable or intermediate. When the query is “XX office news”, “XX office”, “news” and the like correspond to the same phrase, synonym phrase or synonym phrase. Here, it is assumed that the determination unit 23 determines that the number of identical phrases, synonym phrases, or synonym phrases that are commonly included in a predetermined number of Web pages is five or less, which is the lower limit reference number, and that the search result is variable. explain.

  Since the determination unit 23 determines that the snippet generation unit 24 is variable, the number of snippet lists displayed on the terminal 2 as a search result at once (for example, on one page) is set to “20”, and the list is displayed. The number of characters per snippet is set to “50”, the same phrase, synonym phrase or synonym phrase included in common in the Web page included in the list is extracted only once from the top, and the Web page included in the list is extracted. More feature words are extracted than when not determined to be variable, and a snippet is generated using these extracted words. Then, the snippet transmission unit 25 transmits the snippet generated by the snippet generation unit 24 to the terminal 2 together with the list.

  FIG. 9 is a display example on the screen 40 at this time. The query input unit 41 displays “XX office news”. Then, as the “web search result”, the search condition is “XX office news”, about 500,000 results are obtained under this search condition, and the search result is sent to the terminal 2 at once (for example, This indicates that the number of snippet lists to be displayed is “20” on one page. Each search result includes a 50-character snippet that summarizes the contents of the archive DB 32.

  According to this embodiment, the determination unit 23 refers to the content of the Web page specified by the search unit 22, and the number of identical phrases, synonym phrases, or synonym phrases that are commonly included in a predetermined number of Web pages is the upper limit criterion. If the number is more than the number, it is determined to be fixed, and the snippet generation unit 24 displays the search result at a time (for example, on one page) when the determination unit 23 determines that the number is fixed, compared to the case where it is not. A snippet is generated by reducing the number of snippet lists and increasing the number of characters per snippet constituting the list. Then, the snippet transmission unit 25 transmits the snippet generated by the snippet generation unit 24 to the terminal 2 together with the list. Thereby, although the number of lists is small on the display screen of the user's terminal 2, the information amount of each snippet can be made rich. Therefore, by browsing a snippet with a large amount of information, the user is not only more likely to reach a desired web page more accurately, but also only by browsing the snippet without referring to the web page in the end. It can also be expected that desired information can be obtained. In this way, it is possible to provide the search server 3 capable of estimating the user's search intention and automatically switching the snippet generation method without depending on the user's selection operation.

  In addition, when the user can obtain desired information only by the page displaying the snippet, the page displaying the snippet may be browsed for a longer time than before, and the printing frequency of the page is increased. there is a possibility. In such a case, there is also an effect that the value of the advertisement attached to the page displaying the snippet is increased.

  Further, according to the present embodiment, the determination unit 23 determines that the number of identical words, synonyms or synonyms included in a predetermined number of Web pages in common is less than or equal to the lower limit reference number, and the snippet When it is determined that the variable is variable, the generation unit 24 increases the number of lists of snippets to be displayed at one time (for example, on one page), and decreases the number of characters per snippet constituting the list. The same phrase, synonym phrase, or synonym phrase that is commonly included in the Web pages included in the list in which the list is increased is extracted only once from the top, and the characteristic words of the Web page included in the list are extracted as the variable More than the case where it is not determined, a snippet is generated using these extracted words. Thereby, the search server 3 allows the user who browsed the snippet to browse the phrase included in the web page included in the list increased in number only once, and further browse the characteristic words of the web page. be able to. Therefore, when a query that hits various topics is input, the user can obtain a wide range of information just by looking at the snippet while suppressing the possibility of browsing the same phrase or topic multiple times. As a result, the user who viewed the snippet may be able to grasp the outline of the desired information without directly viewing the contents of the linked web page, in which case the user clicks on the link destination. There is no need to browse. In this way, it is possible to provide the search server 3 capable of estimating the user's search intention and automatically switching the snippet generation method without depending on the user's selection operation.

  In addition, the effect described in this embodiment only enumerated the most suitable effect which arises from this invention, and the effect by this invention is not limited to what was described in this embodiment.

DESCRIPTION OF SYMBOLS 1 System 2 Terminal 3 Search server 10 Terminal control part 11 Query transmission part 12 Snippet display part 20 Search server control part 21 Query reception part 22 Search part 23 Judgment part 24 Snippet generation part 25 Snippet transmission part 30 Search server control part 31 Index DB
32 Archive DB

Claims (4)

Query receiving means for receiving a query from a terminal;
A search means for searching and specifying a Web page having a high degree of association with the query;
The content of the Web page specified by the search means is referred to, and when the number of the same words, synonyms or synonyms included in a predetermined number of Web pages is equal to or more than the upper limit reference number, it is determined to be fixed A determination means;
When the determination means determines that the list is fixed, the number of snippets displayed at a time as a search result is reduced as compared to the case where the determination is not fixed, and the number of snippets constituting the list is reduced. Snippet generation means for generating a snippet by increasing the number of characters,
A search server comprising snippet transmission means for transmitting the snippet generated by the snippet generation means together with the list to the terminal. The server according to claim 1,
The determination means further determines that the number of the same phrase, synonym phrase, or synonym phrase that is commonly included in the predetermined number of Web pages is less than or equal to the lower limit reference number, and is variable.
The snippet generation means increases the number of snippet lists to be displayed at a time and decreases the number of characters per snippet constituting the list and increases the number when determined to be variable. The same phrase, synonym phrase, or synonym phrase that is commonly included in the Web pages included in the list is extracted only once from the top, and the characteristic words of the Web page included in the list are not determined to be variable. A search server that extracts more than the case and generates snippets using these extracted phrases. A system comprising a terminal that transmits a query and a search server that responds to the query,
The terminal has query transmission means for transmitting a query,
The search server
Query receiving means for receiving the query from the terminal;
A search means for searching and specifying a Web page having a high degree of association with the query;
The content of the Web page specified by the search means is referred to, and when the number of the same words, synonyms or synonyms included in a predetermined number of Web pages is equal to or more than the upper limit reference number, it is determined to be fixed A determination means;
When the determination means determines that the list is fixed, the number of snippets displayed at a time as a search result is reduced as compared to the case where the determination is not fixed, and the number of snippets constituting the list is reduced. Snippet generation means for generating a snippet by increasing the number of characters,
Snippet transmission means for transmitting the snippet generated by the snippet generation means to the terminal together with the list;
The terminal further includes snippet display means for displaying the snippet transmitted by the snippet generation means together with the list. The search server responds to the terminal that sent the query,
The search server
A query receiving step of receiving a query from the terminal;
A search step for searching and specifying a Web page having a high degree of association with the query;
Judgment that refers to the content of the Web page specified in the search step, and determines that it is fixed when the number of the same phrase, synonym phrase, or synonym phrase that is commonly included in a predetermined number of Web pages is equal to or greater than the upper limit reference number Process,
When it is determined that the determination is fixed, the number of snippet lists displayed at a time as a search result is reduced as compared to the case where the determination is not fixed, and the number of characters per snippet constituting the list is reduced. A snippet generation process for generating a snippet by increasing
A snippet transmission step of transmitting the snippet generated in the snippet generation step together with the list to the terminal.

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