JP2004264927A - Web site retrieval method and device, web site retrieval program, and storage medium recording the program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a retrieving person to know whether or not information in a Web site is significantly updated and select a result fitted to a purpose. <P>SOLUTION: A site retrieval engine 1 collects Web pages and divides them to sites. A site retrieval device or site manager information management server 4 having the site retrieval engine 1 and a site retrieval result generation part 2 calculates update amount of each site and stores it in a site DB 3 in advance. The site retrieval engine 1 performs a site retrieval according to a retrieval request from the retrieving person to acquire a hit page and a site ID to which the page belongs, also calculates the retrieval score of each site followed by sorting in descending order, and delivers site retrieval information to the site retrieval result generation part 2. The site retrieval result generation part 2 acquires the update amounts of the sites included in the site retrieval information from the site DB 3 followed by sorting in descending order of update amount to generate a site retrieval result, and presents the result to the retrieving person. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a Web information search method and apparatus for providing Web information on a WWW (World Wide Web) to searchers on a site-by-site basis, and in particular, a function of ranking site search results based on an update amount. And a Web site search method and apparatus having the same.
[0002]
[Prior art]
The WWW stores a set of Web pages as hypermedia information having a link relation, and a searcher reaches a Web server defined by a URL (Universal Resource Locator), searches for a Web page, and searches for the Web page and its link relation. , The information of the target Web page set can be obtained.
[0003]
As a system for providing Web information when the URL is unknown or when the search range is expanded, there is a service using a search engine. The search engine uses a robot-type search engine that automatically collects WWW pages, collects a large number of Web pages while following hypertext links, divides the sites into sites, builds a database, and provides Web site information to searchers. providing.
[0004]
If there is no indication as to whether or not the content has been updated on the Web site provided by the Web information providing system, the searcher searches once, and determines whether the content of the referred site has been updated since the previous visit. Without knowing, they lose their willingness to visit again. In this case, there is a problem that the effect of providing information does not increase in the operation of the site, and a searcher misses an effective information acquisition opportunity.
[0005]
In contrast to such a system, there is a system that attempts to present the update time of Web information. As an example, there is a fresheye shown in Non-Patent Document 1 below. Freshkey has a function of viewing the time stamp of a file and displaying the results in that order. It also has a new arrival search function that searches only information that has been updated relatively recently.
[0006]
[Non-patent document 1]
freshkey (Internet URL: http://www.freshkey.co.jp/), Internet search January 7, 2003
[0007]
[Problems to be solved by the invention]
However, since those functions of freshkey only look at the time stamp information of the file, there is a problem that it is not possible to indicate how large the update to the file is. In addition, there is a problem that it is not possible to know how much update has been made in the entire site by the method using those functions.
[0008]
The present invention has been made to solve the above-described problem of the related art. In a site search, a searcher knows from a search result whether or not there has been a large update in site information, and selects a result suitable for the purpose. The challenge is to provide a site search technology that can be used.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a process of collecting Web pages in advance, dividing them into sites, calculating an update amount of each site for each site, storing the updated amount in a site database, and searching for a searcher. Performing a page search in response to a search request from a site search terminal device based on the request, performing a site search on a site database for a hit page, and acquiring site search information including a plurality of sites; Acquiring the update amounts of a plurality of sites included in the information from the site database, sorting the site search information in descending order of the update amount of the acquired sites, and setting the site based on the sorted site search information. Generating a search result and transmitting the search result to the site search terminal device. The means of its resolution.
[0010]
Alternatively, in the above-mentioned website search method, in the process of calculating the update amount of the site and storing the updated amount in the site database, the file name lists in the site before and after the update are compared, and the list of the file names appearing in both lists is compared. Calculates the amount of site update by dividing the number of files to be updated by the number of updated files, or by dividing the number of files in the updated site whose update flag is 1 by the total number of files. A Web site search method characterized in that the search is performed as means for solving the problem.
[0011]
Alternatively, in the Web site search method, in the step of acquiring the site search information, a search score indicating a degree of suitability for the site search is calculated and included in the site search information. In the case where a plurality of identical sites exist, a Web site search method which sorts based on the search score or outputs site search information already sorted based on the search score is solved. Means.
[0012]
Alternatively, in the Web site search method described above, a Web site search method characterized in that in the sorting step, the update amount of each site is presented together with the site search result, as a means for solving the problem.
[0013]
Alternatively, a Web page collected in advance is divided into sites, and a site database that stores an update amount of the site calculated for each site, and a search request from a site search terminal device based on a search request of a searcher, A page search is performed, a site search is performed on the site database for the hit page, and a site search engine that acquires site search information including a plurality of sites, and an update amount of the plurality of sites included in the site search information is determined. Means for acquiring from the site database, means for sorting the site search information in descending order of the amount of update of the acquired site, and generating a site search result based on the sorted site search information, the site search terminal And a means for outputting to a device. And of means.
[0014]
Alternatively, in the Web site search device, the update amount of the site is determined by comparing a list of file names in the site before and after the update, and dividing the number of files appearing in both lists by the number of files after the update. A Web site search device characterized in that the value is a value calculated by the number of files updated in the site, or by the number obtained by dividing the number of files whose update flag is 1 by the total number of files in the updated site. Means of solution.
[0015]
Alternatively, in the above-described Web site search device, when a plurality of sites having the same update amount exist, the sorting unit may include a search score indicating a degree of conformity to a site search calculated by a site search engine, or a site search. Sorting based on the search score indicating the degree of matching to the site search calculated by the terminal device, or sorting the site search information sorted by the search score indicating the degree of matching to the site search calculated by the site search engine A Web site search device characterized by output is used as a means for solving the problem.
[0016]
Alternatively, in the above-described Web site search device, the sorting unit presents the sorted search results together with the update amount of each site, and the Web site search device is a solution to the problem. And
[0017]
Alternatively, a Web site search program characterized by using a program for causing a computer to execute the process in the above Web site search method is used as a means for solving the problem.
[0018]
Alternatively, a recording medium storing a Web site search program, wherein the program in the above-described Web site search method is recorded on a computer-readable recording medium as a program for causing a computer to execute the process, is recorded. , As a means of solving the problem.
[0019]
In the present invention, the Web pages collected in advance are divided into sites, the update amount of each site is calculated and stored, and the site search device acquires the update amount of the site included in the site search result, and performs the site search. Sorting the results in the order of the site with the largest update amount and presenting it to the searcher allows the searcher to know from the site search results whether there has been a major update to the site information, and the searcher has no To select the results.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
FIG. 1 shows a configuration of a Web site search system according to this embodiment. The system includes a site search engine 1, a site search result generation unit 2, and a site database (hereinafter, the database is referred to as DB) 3 as main components of the site search device, and a site operator information management server. 4 is provided.
[0022]
The site search engine 1 performs a page search in response to a search request from a site search terminal device (not shown), performs a site search on the site DB 3 for a hit page, and stores a plurality of hit pages including the hit page ID and the site ID of the page. Is passed to the site search result generation unit 2.
[0023]
The site search result generation unit 2 receives a site search information including a plurality of site IDs obtained by the site search from the site search engine 1, and performs a site search from the site DB 3 in which an update amount is calculated in advance for each site ID and stored. Means for acquiring the update amounts of a plurality of site IDs included in the information, means for sorting the site IDs for which the site search information has been acquired in descending order of update amount, and means for generating a site search result from the sorted site search information And means for transmitting the generated search result to the site search terminal device that has issued the site search request.
[0024]
As the site search terminal device, means for making a search request to the site search engine 1 based on a search request of a searcher, and a display device which receives the site search result generated by the site search result generation unit 2 and Output means for outputting to an output device such as
[0025]
The site DB 3 divides web pages collected in advance into sites, stores the update amount of the site calculated for each site ID, and updates the site in response to a request from the site search result generation unit 2. Provide information. The calculation and storage of the update amount may be performed by the site search engine 1 or the site operator information management server 4 by acquiring necessary data, but may be performed by another device.
[0026]
The site operator information management server 4 manages the creation and update of the web page provided by the site operator, notifies the site search engine 1 of the presence or absence of the update of the web page, and updates the site DB 3 to the site DB 3 as necessary. Is calculated and stored.
[0027]
Next, a processing procedure of the Web site search method according to the present embodiment, which is executed by the present system, will be described.
[0028]
The method includes pre-processing and processing at the time of site search. Hereinafter, each processing procedure will be described with reference to FIG.
[0029]
<Pre-processing>
FIG. 2 is a flowchart showing a processing procedure of the entire pre-processing in the Web site search method according to the embodiment. S11 to S14 represent processing steps. The pre-processing is performed independently before the processing at the time of site search.
[0030]
First, a large amount of Web pages are collected by a device such as a server that performs pre-processing (S11). In this example, it is assumed that the site search device performs the pre-processing as a device such as a server.
[0031]
The site search device divides the collected Web pages by site (S12). In this site division, a top page of a Web site is estimated from a large number of Web page sets, and a page set including the estimated top page and pages linked to the estimated top page is determined as a site.
[0032]
For the top page estimation and site determination, for example, technologies (for example, Japanese Patent Application Nos. 2001-38947 and 2001-389448) already proposed by the present applicant can be used.
[0033]
In order to estimate the top page of the site, the searched Web pages are classified for each server, a page classification tree obtained by extracting a page class from the meta information and the page type is obtained, and the page type of each page is obtained based on the classification tree. Is extracted, and for pages belonging to the same server, the page whose directory hierarchy is located at 0 is estimated as the top page with the highest priority. If there is no top page at hierarchy 0, the top page type Determine the directory hierarchy in which the top page exists based on the classification likelihood, and rank the top page that belongs to this directory hierarchy, has files in the lower hierarchy, and has the maximum classification likelihood for the page type or more than the threshold. Estimate as a page.
[0034]
The site is determined by using meta information and a link classification tree for each page and link of the searched Web page set to obtain the classification likelihood of each link for each link type, and further obtaining the meta information and the page type. , A page classification tree in which a page class is extracted is acquired, and the classification likelihood of the page type of each page is extracted. Thereafter, for all servers to which the Web page belongs, a Web site is created based on the above classification likelihood. The top page candidate set is obtained and their parent pages are estimated. In this estimation also, the parent page exists in the shallow hierarchy of the directory from the undetermined page set and the sum of the top page, index page, and menu page likelihood is The parent page is estimated with the largest page as the top page candidate, and the estimated parent page and the page linked thereto are estimated. A set and site.
[0035]
Since the site tree structure is estimated from the parent-child relationship of the link of the page of each site by the link from the top page, the estimated site tree structure is stored in, for example, the site DB 3 or the like. This site tree structure is used for calculating a search score.
[0036]
In the site DB 3, a list of file names before and after updating is stored for each site in order to calculate the amount of site updating. Further, an update flag indicating whether or not the file has been updated is provided for each file.
[0037]
Alternatively, a page DB (not shown) is provided to calculate the amount of site updates and to generate site search results. The page DB stores the number of links to multimedia files such as moving images / images, the file size (the amount of text, the number of bytes), the file size excluding tags, and the document vector for all collected pages. . Further, an update flag indicating whether or not the page has been updated is provided for each page, and whether or not all pages have been updated is checked for each site at a fixed cycle or at an appropriate time (S13). The details of this update presence / absence check are shown in FIG. Note that a document vector is defined as a vector dimension where each of a plurality of predetermined words is defined as a vector dimension, and when each word appears in the document, the size is given to each corresponding dimension by the number of appearances and the like, and the document is expressed in a vector. It was done.
[0038]
In FIG. 3, for all pages collected in the site DB 3, first, the number of links to a multimedia file such as an image, the file size (the amount of text, the number of bytes), and the document vector are stored in variables (S21).
[0039]
Next, for each of the pages, the number of links, the file size, and the document vector of the multimedia file such as an image stored in the page DB are obtained, and the difference between these values and the value of the variable obtained in step S21 is separated. (S22). The difference is an integer type for the number of links and the file size, and a dissimilarity (reciprocal of the cosine value of two document vectors) for the document vector.
[0040]
Next, a page update amount U is calculated for each page based on the above difference (S23). The page update amount U is obtained from the following equation from the increase in the number of links, the increase in the file size, and the dissimilarity of the document vector.
[0041]
(Equation 1)
U = αL / A + βM / S + γN
Where L is the increment of the number of links, A is the number of links after the update, M is the increment of the file size, S is the file size after the update, N is the dissimilarity of the document vector, α, β, and γ are 0 or more and 1 The following real numbers and values satisfying α + β + γ = 1 are set. The update amount U of a newly created page is set to 1.
[0042]
Next, it is checked whether or not the page update amount U obtained by the above equation exceeds a certain threshold value (S24), and if it does, "1" is stored in the update flag of the page in the page DB (S25). If not, "0" is stored in the update flag of the page (S26).
[0043]
The above processing is performed for all pages, and whether or not there is a significant update for each page is stored as a flag for each page in the page DB.
[0044]
Subsequently, the update amount of the site is calculated and stored for each site (S14). FIG. 4 shows the details of the site update check process.
[0045]
In FIG. 4, the update amount of each site is first calculated for all the divided sites (S31). This calculation is performed, for example, by comparing the list of file names in the site before and after the update stored in the site DB 3, and dividing the number of files appearing in both lists by the number of updated files (ratio of the number of files). Ask. This calculation method can save the trouble of calculating the update amount for each page. As another example of the calculation method, a value obtained by dividing the number of files whose update flag is 1 by the number of updated files among the files in the site is obtained. Note that the update amount of the new site is 1. The calculated update amount is a value between 0 for a site without update and 1 for a new site. The calculated update amount is stored in the site DB 3 for each site ID (S42).
[0046]
Next, it is checked whether or not the amount of the site update calculated in the above processing S31 exceeds a certain threshold value (S33), and if it exceeds the threshold, "1" is stored in the update flag of the site in the site DB3 (S34). If not, "0" is stored in the update flag of the site (S35). This processing is necessary for generating the site search result, and is not necessary depending on the content of the site search result.
[0047]
The above processing is performed for all sites, and the update amount and a flag indicating whether or not a large update has been performed as necessary are stored in the site DB 3 for each site ID.
[0048]
When there is an update request for a page registered in the site DB 3, the site operator information management server 4 registers the page URL of the update information in the site search engine 1 or the like, and The update information is overwritten on the site DB3. As a result of this page update, the file size data and the like before the update remain in the page DB, the file size and the like of the updated page in the site DB 3 have been changed, and this difference is used for the page update check (S13) and the site update check. At the time of (S14), it is used for determining the presence / absence of update and calculating the update amount of the site.
[0049]
In place of the page update check (S13) and the site update check (S14), when a page update request is issued, the site operator information management server 4 performs the above-described file size increment, file number increment, and link number. It is also possible to check whether or not the page has been updated from the increment or the like, set the flag of the page, or check the update amount or the presence or absence of the update of the site. Further, the dissimilarity of the document vector is managed by the site operator information management server 4, and the presence or absence of the update is notified to the site search engine 1 periodically, or the update information is described in a specific file, and the file is transferred to the robot type. May be collected by a search engine.
[0050]
<Process at the time of site search>
FIG. 5 is a flowchart for explaining processing at the time of site search in the Web site search method according to the embodiment. In the figure, S41 to S49 represent processing steps.
[0051]
First, the site search engine 1 collects hit Web pages in response to a search request from the site search terminal device, and performs a site search on the site DB 3 for each Web page (S41), thereby satisfying the search request. The search information for each site is obtained (S42). For this site search, for example, a technology already proposed by the present applicant (for example, Japanese Patent Application No. 2001-389446) can be used.
[0052]
In this site search, the site DB 3 is searched based on page information that has been hit in the search, and a site ID and a URL of the top page are obtained for each page, and a search score is obtained as a value indicating the degree of conformity to the search request. . The site search information sorted and ranked in the order of higher search scores is transferred to the site search result generator 2. In the calculation example of the search score here, an original score obtained by taking into account the weight of the search keyword for each page and a score calculated based on the site tree structure are added for each site to obtain a search score.
[0053]
Specifically, first, the original score s (p) is calculated by the product of the number of keywords included in the page and the reciprocal of the number of pages including the keyword in the set of pages to be searched (“information search”). And Linguistic Processing, "Takenobu Tokunaga, University of Tokyo Press ISBN 4-13-064055-5, pp. 26-32. Next, the site ID to which each page belongs and the depth d (p) from the root (top page) in the site tree structure are obtained from the site DB 3 or the like for each page. Next, for each page, a score score (p) is calculated as the degree of matching with the keyword by the following formula, and added to each site to obtain a search score.
[0054]
(Equation 2)
score (p) = f (s (p)) × (1 / (α + (d (p))) ² × β))
Here, α and β represent constants larger than 0 and smaller than 1, and f (s (p)) represents an arbitrary function such that when s (p) is high, score (p) also becomes high. In this example, the case where the site search engine 1 calculates the search score has been described, but the original score may be acquired from the site search engine 1 and calculated by the site search result generation unit 2 or another device. .
[0055]
S43 and subsequent steps show a procedure of a process of sorting the site search information based on the update amount in the site search result generation unit 2.
[0056]
First, the site search result generation unit 2 stores the site search information received from the site search engine 1 in a hash variable R (S43). Here, R is a variable by which a search score can be subtracted from a site ID, and R {site ID} is a search score of the site given as search information from the site search engine 1.
[0057]
Next, the update amount of the site is searched from the site DB3 using each site ID as a key, and the obtained update amount is stored in the array variable A together with the site ID (S44).
[0058]
Hereinafter, the array variable A is sorted by repeating the loops 1 and 2 by the update amount of the site (S45).
[0059]
Loop 1 repeats the process for each element An of array variable A. The loop 2 repeats the process for each element Am of m> n in the array variable An.
[0060]
First, in loop 2, a first determination is made as to whether An [1] = Am [1], with An [0] being the site ID and An [1] being the update amount of the site (S46). . If the first determination is Yes, it is determined whether or not R {An [0]} <R {Am [0]}, that is, a second whether or not the search score of the site An is smaller than the search score of the site Am. Is determined (S47). If the second determination is Yes, An and Am are exchanged by swap processing (S48).
[0061]
When the first determination is No or the second determination is No, the processing of Loop 2 is repeated. When the loop 2 is completed for all Am of a certain site An, the process of the loop 1 is repeated to the next site An + 1 by repeating the process of the loop 2 for the next site An + 1. By repeating the above loops 1 and 2, array variables B of the sites sorted by the update amount are generated. However, array variable B stores pointers to each element of array variable A.
[0062]
The array variable B sorted by the update amount is passed to the processing for generating the site search result (S49).
[0063]
Next, FIG. 6 shows a flowchart of a process of generating a site search result in the site search result generation unit 2. In the figure, S51 to S56 are processing steps.
[0064]
The site search result generated by this process also shows the following.
[0065]
1) Top page information representing the site, page information within the site hit by the AND / OR logic of a single search keyword or a plurality of search keywords, and a search score;
2) A link to the update information page (there can be various buttons and the like), but if there is no update information, the link is not displayed. If no update information page has been registered, information indicating "updated" is displayed (text, image, etc.).
[0066]
Here, a process of generating a site search result when the above-described page DB is generated will be described. As the site search result, at least site information sorted and ranked by an update amount and site information of each site are displayed. It is arbitrary as long as the top page URL and the hit site URL exist, and there are processes that become unnecessary according to the URL, so the following processing procedure changes.
[0067]
In addition, since the site search information is sorted by the search score from the site search engine 1 to the site search result generating unit 2, the sites having the same update amount are ranked in the order of the search score without considering the update amount. Site search results are generated. If the site is not ranked by the search score, the search score calculated by the site search engine 1 or the search score calculated by the site search result generation unit 2 is used to search for sites having the same update amount in the sorting process. The sites with the highest scores should be replaced so that they are ranked higher.
[0068]
In FIG. 6, for each site to be displayed as a search result, first, the site DB 3 is searched using the ID of the searched site as a key, and a top page URL representing the site and the presence or absence of update information are indicated. The flag of the site to be executed and the hit page, and the URL of the update information page are obtained (S51).
[0069]
Next, the link to the top page URL of the site and the hit page URL in the site related thereto is output as HTML (S52).
[0070]
Next, the flag of the site is checked (S53). If the flag is "1", it is checked whether or not there is an update information page from the page flag in the site (S54). An image or the like indicating that there is an update is output to the site as HTML (S55), and if there is an update information page, a link (represented by a button or the like) to the update information page is output as HTML (S56).
[0071]
The site search result in FIG. 1 shows a display example at the time of a site search. The search condition is “men's shoes”, and “Shoes shop” and “B shoes store” are searched and displayed as sites meeting these conditions. Then, a hit page is displayed in the “A shoe shop”, and a button such as “New” is displayed when there is a related update information page. When the searcher clicks the button, a page previously selected by "A shoe shop" is displayed.
[0072]
Therefore, a hit page is displayed as a normal search result, but in addition to the search result in the present embodiment, a link to an update information page is displayed for a page with a large update degree, and a page with a small update degree is displayed. Indicates that there has been an update. Similarly, it is also possible to change the display mode for a site with a large update degree and a site with a small update degree. As a result, the site operator can automatically generate own site information that attracts the searcher's interest, and the searcher can easily know a site with a high degree of update from the site search result.
[0073]
The function realizing means of each unit shown in FIG. 1 is constituted by a computer program, or the steps of the processing shown in FIGS. 2 to 6 are constituted by a computer program, and the program is executed by the computer. Needless to say, a computer-readable recording medium, such as a flexible disk or an MO, stores a program for realizing the function of the computer or a program for causing the computer to execute the processing steps. , A ROM, a memory card, a CD, a DVD, a removable disk, or the like, and can be stored or distributed. Further, it is also possible to provide the above program through a network such as the Internet or e-mail. The present invention can be implemented by installing the above-mentioned program in a computer from these recording media, or by installing the above-mentioned program in a computer by downloading from a network.
[0074]
【The invention's effect】
As apparent from the above, according to the present invention, a searcher can know from a search result whether or not there has been a large update in site information, and can select a desired result.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a Web site search system according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a processing procedure of the entire pre-processing in a Web site search method according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating details of a page update check.
FIG. 4 is a flowchart showing details of a site update check.
FIG. 5 is a flowchart illustrating processing at the time of a site search in a Web site search method according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating a process of generating a site search result in a Web site search method according to an embodiment of the present invention.
[Explanation of symbols]
1. Site search engine
2. Site search result generation unit
3. Site DB
4: Site operator information management server

Claims (10)

Collecting web pages in advance, dividing them into sites, calculating the update amount of the sites for each site, and storing the updated amount in the site database;
A process of performing a page search in response to a search request from a site search terminal device based on a search request of a searcher, performing a site search on a site database for a hit page, and obtaining site search information including a plurality of sites; ,
A step of acquiring the update amounts of the plurality of sites included in the site search information from the site database,
Sorting the site search information in descending order of the amount of update of the acquired site;
Generating a site search result based on the sorted site search information and transmitting the result to the site search terminal device. In the process of calculating the update amount of the site and storing it in the site database,
Compare the list of file names in the site before and after the update, and calculate the update flag by dividing the number of files appearing in both lists by the number of files after the update or among the files in the updated site 2. The Web site search method according to claim 1, wherein the update amount of the site is calculated by a number obtained by dividing the number of files by 1 by the total number of files. In the process of obtaining site search information,
A search score that indicates the degree of relevance to site search is calculated and included in the site search information.
In the sorting step,
3. When there are a plurality of sites having the same update amount, the site is sorted based on the search score, or site search information already sorted based on the search score is output. Web site search method described in. In the sorting step,
4. The Web site search method according to claim 1, wherein an update amount of each site is presented together with the site search result. A site database in which Web pages collected in advance are divided into sites, and an update amount of the site calculated for each site is stored;
A site that performs a page search in response to a search request from a site search terminal device based on a search request of a searcher, performs a site search on the site database for a hit page, and obtains site search information including a plurality of sites. Search engine,
Means for obtaining the update amount of the plurality of sites included in the site search information from the site database,
Means for sorting the site search information in the descending order of the update amount of the acquired site,
Means for generating a site search result based on the sorted site search information and outputting the result to the site search terminal device. The update amount of the site,
Compare the list of file names in the site before and after the update, and calculate the update flag by dividing the number of files appearing in both lists by the number of files after the update or among the files in the updated site 6. The Web site search device according to claim 5, wherein a value calculated by dividing the number of files by 1 by the total number of files. The sorting means includes:
When there are a plurality of sites having the same update amount, a search score indicating the degree of conformity to the site search calculated by the site search engine or a search score indicating the degree of conformity to the site search calculated by the site search terminal device 7. The system according to claim 5, wherein the site search information is sorted based on the site search information or the site search information is sorted by a search score indicating a degree of conformity to the site search calculated by the site search engine. Web site search device as described. The sorting means includes:
The Web site search device according to any one of claims 5 to 7, wherein the sorted search result is presented together with the update amount of each site. A Web site search program, wherein the program in the Web site search method according to any one of claims 1 to 4 is executed by a computer. A program for causing a computer to execute the process in the website search method according to any one of claims 1 to 4,
A recording medium recording a Web site search program, wherein the program is recorded on a recording medium readable by the computer.

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