JP2006268771A - Retrieval result providing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retrieval result providing device, for enabling a user to efficiently acquire information in acquisition of information from Web pages based on their update information. <P>SOLUTION: This device comprises an input information determination part 12 accepting input of a retrieval keyword and rearrangement instruction from a user; a retrieval part 13 retrieving Web pages disclosed on a network with the retrieval keyword; a page content acquisition part 24 acquiring identification information for identifying Web pages; a page update date acquisition part 25 acquiring update information for the Web pages; a retrieval result storage part 26 storing result information composed of pairs of identification information of Web pages and update information of the Web pages; a rearrangement part 14 rearranging, based on the rearrangement instruction, result information stored in the retrieval result storage part 26 in descending order or ascending order of update information; and a retrieval result list transmission part 15 transmitting the result information rearranged by the rearrangement part 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a search result providing apparatus that searches a web page and provides a search result to a user.

  In recent years, with the spread of personal computers (PCs) and the development of networks, it has become common for many network users (hereinafter referred to as “users”) to use a large number of information resources distributed on the network.

  For example, on the Internet, texts that are released using a WWW (World Wide Web) system called a web page exist in a distributed manner, and a wide variety of information is released by these web pages.

  Many users normally use a client device such as a PC connected to the Internet, browse a web page by executing a browser program, and use the information obtained there in various aspects of social life. ing.

  Here, the number of web pages published on the Internet is enormous, and many of them have not been updated for a long time and have lost their effectiveness and usefulness. . Therefore, in order to obtain information useful for the user efficiently from the Internet, the user must efficiently select from the enormous number of web pages and determine a web page to be accessed.

  The reference when the user performs selection and determines the web page to be accessed is the type of information obtained by browsing the web page and the time when the information is updated. The time when this information was updated can be known from the date when the web page was updated.

  In other words, when a user tries to obtain useful information for himself / herself from the Internet, he / she wants to select and access a web page on which a desired type of information is posted and which is included in a certain period of time with an update date. Although the criteria of the update date of the web page considered that the information posted is useful are considered, it is determined by the user and the type of information.

  For example, a user who wants to know the latest trends in computer technology may say “from 3 months ago to today”, and a user who wants to read a paper published on a theory of mathematics “from 5 years ago to last year”. There is also a case.

  Basically, you can access, browse, and check the content of any web page to determine if the content on it is useful to you, The number of web pages is enormous, and it is impossible to access and confirm all of the web pages on which some kind of information is posted.

  That is, it is very important for a user to know when a web page has been updated before accessing it in order to determine whether the web page is useful to him and to obtain information efficiently. It is an important matter.

  Therefore, a search site that can be searched by the update date and can be sorted by the update date is also disclosed (for example, Non-Patent Document 1).

  In this search site, a user can search a web page by a keyword and an update date. The search results are displayed in a list format, that is, as a search result list, and the user can sort the search result list according to the update date of the web page.

The user selects a web page to be accessed from the search result list sorted according to the update date, and clicks a link (hereinafter simply referred to as “link”) for accessing the web page. You can get information by browsing the contents posted on the website.
"Infoseek (R)", [online], Internet <URL: http://www.infoseek.co.jp/>

  However, in the conventional search site, when sorting by the update date, the keyword search is performed again, and the search result is sorted by the update date. In other words, while the user only requests the sorting of the search results by the update date, it is necessary to perform a keyword search for the web page again.

  For this reason, when a lot of users request reordering by update date, the load on resources such as servers for search sites increases. As a result, the response of the entire search site is lowered, and there is a problem that the user cannot perform an efficient search.

  In view of the above problems, the present invention provides a search result providing apparatus for allowing a user to efficiently acquire information when the user acquires information from a web page based on the update information. Objective.

  In order to achieve the above object, a search result providing apparatus according to the present invention is a search result providing apparatus for searching a web page and providing a search result, wherein a search keyword input from a user and a sorting instruction are provided. Accepting means for receiving; search means for searching a web page published on a network using the search keyword as a search condition; identification information acquiring means for acquiring identification information for identifying the web page; and the web page Update information acquisition means for acquiring the update information, result storage means for storing result information as a set of identification information of the web page corresponding to the search by the search means and update information of the web page, and the reception Based on the rearrangement instruction received by the means, the result information stored in the result storage means is changed to the update information. A rearranging means for rearranging in descending or ascending order, characterized in that it comprises a result information sending means for sending the sorted by the sorting unit result information.

  As a result, the user can search the web page on which the desired information is posted by performing a keyword search for the web page, and also knows the update information of the web page corresponding to the search as the search result. Can do. Further, when an instruction is given to rearrange the search results in descending order or ascending order for the update information, the search results stored in the result storage means are rearranged and transmitted. Therefore, the search is not executed again, and the user can efficiently acquire information from the web page based on the update information.

  Note that the present invention can be realized as a search result providing method using characteristic means provided in the search result providing apparatus of the present invention as steps, or as a program for causing a computer to execute these steps. The program can be distributed via a storage medium such as a CD-ROM or a transmission medium such as the Internet.

  The present invention can provide a search result providing apparatus for allowing a user to efficiently acquire information when the user acquires information from a web page based on the update information.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
First, the configuration of a search result providing system according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is an overview diagram showing a configuration of a search result providing system. The search result providing system 1 is a system that performs a search for a web page (hereinafter also simply referred to as “page”) and provides the search result. The server apparatus 10, client apparatuses 201 and 202, And a network 200 for connecting them to each other. The server device 10 is a device that performs a search for a web page and provides the search results to the client devices 201 and 202. The client devices 201 and 202 are devices that execute a browser program, access the server device 10, input a search instruction, and display the search result.

FIG. 2 is a functional block diagram illustrating a functional configuration of the server apparatus 10.
The server device 10 is a device that performs a search for a web page as described above and provides the search results to the client devices 201 and 202. The server device 10 includes a collected page information storage unit 30, a page content information storage unit 40, , Page update date information storage unit 50, public I / F (interface) unit 11, input information determination unit 12, search unit 13, search result storage unit 26, rearrangement unit 14, and search result list A sending unit 15, a collection I / F unit 21, a collection / analysis unit 22, a page comparison unit 23, a page content acquisition unit 24, and a page update date acquisition unit 25 are provided.

  The public I / F unit 11 is a processing unit for exchanging information with the client device 201 (202) via the network 200.

  The collected page information storage unit 30 is a storage device that stores collected page information 31 for recording various information such as web page contents and update dates. The collected page information 31 will be described later with reference to FIG.

  The page content information storage unit 40 is a storage device that stores page content information 41 for recording information about the content of a web page. The page content information 41 will be described later with reference to FIG.

  The page update date information storage unit 50 is a storage device that stores page update date information 51 for recording information about the update date of a web page. The page update date information 51 will be described later with reference to FIG.

  The input information determination unit 12 receives information such as a search condition input from the client device 201 (202) by the user, an instruction to the server device 10 and a selection related to a display item of the search result, and determines the instruction or selection. The processing unit transmits the received information to the search unit 13 or the rearrangement unit 14 according to the determination result.

  The search result storage unit 26 is an example of a result storage unit in the search result providing device of the present invention, and is a storage device that temporarily stores the search result performed by the search unit 13.

  The search unit 13 receives the page content information 41 stored in the page content information storage unit 40 and the page update date information 51 stored in the page update date information storage unit 50 from the input information determination unit 12. It is a processing unit that performs a search according to a search condition.

  The sorting unit 14 sorts the search results performed by the search unit 13 into a predetermined sort order, or the search results stored in the search result storage unit 26 based on an instruction received from the input information determination unit 12. It is a processing part which rearranges. The search result list sending unit 15 is a processing unit that sends the search results received from the sorting unit to the client device 201 (202) via the public I / F unit 11.

  The collection I / F unit 21 is a processing unit for exchanging information with other server devices that publish web pages via the network 200.

  The collection / analysis unit 22 transmits a header request to all URLs recorded in the collection page information 31 stored in the collection page information storage unit 30, collects and analyzes response headers, and according to the result , A processing unit for acquiring the web page of the URL.

  The page comparison unit 23 compares the web page or response header collected by the collection / analysis unit 22 with the web page information recorded in the collected page information 31 stored in the collected page information storage unit 30, The processing unit determines whether to update the page and instructs the collection / analysis unit 22 to acquire a web page and updates the collected page information 31 according to the determination.

  The page content acquisition unit 24 extracts, from the web page information received from the page comparison unit 23, the URL of the web page, the title, the keyword that characterizes the web page, and the display text to be displayed as a search result. The processing unit updates the page content information 41 stored in the page content information storage unit 40.

  The page update date acquisition unit 25 extracts the URL and update date of each web page from the web page information received from the page comparison unit 23, and the page update date information stored in the page update date information storage unit 50. 51 is a processing unit for updating 51.

  FIG. 3 is a diagram illustrating an example of the collected page information 31 stored in the collected page information storage unit 30.

  As shown in FIG. 3, the collected page information 31 is data of a table structure in which web page information collected by the collection / analysis unit 22 is recorded for each web page, and includes a page URL, a last update date, , Title and text. The “text” of the item refers to text data such as characters and symbols displayed to the user when the user browses the web page with a browser program, URLs to other pages existing in the web page Are not recorded, and data such as HTML (Hyper Text Markup Language) tags and scripts that are not displayed are not included.

  Here, each line of the collected page information 31 shown in FIG. 3 is “individual page information”. In this example, the page URL is a unique value, and the individual page information is identified by the page URL.

  FIG. 4 is a diagram illustrating an example of the page content information 41 stored in the page content information storage unit 40.

  As shown in FIG. 4, the page content information 41 is data having a table structure in which information such as a URL and a keyword for each web page acquired by the page content acquisition unit 24 is recorded. , The title and the display text. Note that the display text is extracted by a predetermined number of characters from the top of the text in the individual page information described in FIG.

  Here, each line of the page content information 41 shown in FIG. 4 is “individual content information”. In this example, the page URL is a unique value, and the individual content information is identified by the page URL.

  FIG. 5 is a diagram illustrating an example of the page update date information 51 stored in the page update date information storage unit 50.

  As shown in FIG. 5, the page update date information 51 is data having a table structure in which the URL and update date for each web page acquired by the page update date acquisition unit 25 is recorded. It consists of an item called day.

  Here, each line of the page update date information 51 shown in FIG. 5 is “individual update date information”. In this example, the page URL is a unique value, and the individual update date information is identified by the page URL.

Next, the operation of the search result providing system 1 configured as described above will be described.
First, the search and processing related to the search result performed by the search result providing system 1 will be described below.

  FIG. 6 shows a flow of operations when the server device 10 receives an instruction from the user and sends the processing result to the client device 201 (202), and is a display example of the screen described below. This will be described together with the description of FIGS.

  FIG. 7 is a display example of a screen for receiving a search from the user, which is sent from the server device 10 to the client device 201 (202), and the search reception screen 100 is displayed.

  A keyword input field 101 in the search reception screen 100 is an input field for inputting a keyword that is freely determined by the user. In this example, “science” is input as a search keyword.

  The update date display radio button 102 is a button for the user to select whether to display each update date of the web page corresponding to the search in the search result. Is selected.

  The start date input field 103 and the end date input field 104 are input fields for inputting the start date and the end date of the restriction when the restriction is also made by the update date of the web page to be searched at the time of executing the search. In the case of this example, nothing is input, that is, there is no restriction by the update date when executing the search.

  The search execution button 105 is a button for transmitting “search”, which is an instruction for requesting execution of search to the server device 10 when the user clicks after inputting a search condition such as a keyword.

  When the search execution button 105 is clicked in a state where “Science” is input in the above search condition, that is, the keyword input field 101 and “display” is selected by the update date display radio button 102, input information determination is performed. The unit 12 receives display selection “display”, which is data related to display date selection, and execution instruction “search”, which is data related to execution instruction contents, and a keyword “science” (S1), Since the execution instruction is “search” (search in S2), the display selection “display” and the keyword “science” are transmitted to the search unit 13 (S3).

  Since the display selection received from the input information determination unit 12 is “display” (required in S4), the search unit 13 stores the page content information 41 stored in the page content information storage unit 40 and the page update date information storage. The page update date information 51 stored in the unit 50 is combined with the page URL as a key to generate search combination information (S6).

  The search combination information includes all of the page content information 41 and the page update date information 51.

  The case where the display selection received from the input information determination unit 12 is “not display” (not required in S4) will be described later.

  In the case of the example in FIG. 7, since the restriction by the update date is not performed (there is no restriction at S7), the search by the update date is not performed, and the search is performed only with the keyword “science” for the search combination information. Then, each web page corresponding to the search is ranked based on a predetermined ranking criterion that takes into account the importance of the keyword “science”, etc., rank data is added to the search result, and the result is transmitted to the sorting unit 14. (S8).

  Here, the keyword which is an item of the page content information 41 shown in FIG. 4 characterizes the web page, and a plurality of words are arranged in descending order of importance by the page content acquisition unit 24 described later. . For example, if a web page with “Science” at the top of the sequence is searched with the keyword “Science”, the above ranking is performed, and the result is displayed at the top of the search result list. .

  The search result includes the page URL of the web page corresponding to the search result extracted from the search combination information, the title, the display text, the last update date, and the rank data. Further, the case of performing the restriction by the update date at the time of executing the search will be described later with reference to FIGS.

  The sorting unit 14 receives the search result from the search unit 13, generates a search ID that is an identifier for specifying the search result, and stores the search ID and the search result in association with each other in the search result storage unit 26. . Further, the search results are rearranged based on the rank data (S11), search result list creation data is generated, and sent to the search result list sending unit 15 together with the search ID.

  The search result list sending unit 15 uses the search result list creation data received from the sorting unit 14 to create a search result list including the update date of each web page. The created search result list, the search ID received from the rearrangement unit 14, and the number corresponding to the search are sent to the client device 201 (202) (S12).

  FIG. 8 is a display example of a screen on the client device 201 (202) after executing the search according to the above-described operation flow.

  On the search result display screen 110, a search status display column 111 for displaying the search condition and the number of search results is displayed. As a result of executing the search with the keyword “science”, 2312 hits are indicated.

  Although not displayed on the screen, the search ID is included in the HTML tag constituting the search result display screen 110, and when the user gives an instruction to sort the search results, the search ID is displayed. It is transmitted to the server device 10 together with a rearrangement instruction. The sorting of search results will be described later.

  In the search result display area 112, a list of information on web pages corresponding to the search (hereinafter referred to as “search result list”) is displayed, and each web page sent from the search result list sending unit 15 is displayed. A title, a display text, and a page URL are displayed, and the user can open the web page by clicking the title or the page URL.

  Further, the search result display area 112 is provided with an update date display column 113, which displays the update date of each web page corresponding to the search. The user can determine the usefulness of the web page with reference to this update date before actually accessing it, and can efficiently acquire information.

  Here, the order of the search result list is the order determined by the search unit 13 based on the ranking criteria described above, but when the descending order button 114 is clicked, the update date is in descending order. When the ascending order button 115 is clicked, the search result list is displayed from the top of the search result list in order from the oldest date. This process is realized as a result of the following process.

  When the descending order button 114 is clicked, an execution instruction “descending order” and a search ID are transmitted from the client apparatus 201 (202) to the server apparatus 10. Since the received execution instruction is “descending order” (descending order or ascending order in S2), the input information determination unit 12 transmits the execution instruction “descending order” and the search ID to the sorting unit 14.

  The rearrangement unit 14 extracts a search result corresponding to the received search ID from the search result storage unit 26 (S10). Furthermore, since the received execution instruction is “descending order”, the extracted search results are rearranged in descending order with respect to the update date of the web page (S11) and re-sent to the terminal device of the user (S12). Here, when the execution instruction is “ascending order”, the same processing is performed, the web page update date is rearranged in ascending order and re-sent to the user terminal device (S12).

  FIG. 9 is a display example of the screen when the descending order button 114 is clicked on the search result display screen 110 of FIG. There is no change in the display of the search status display column 111, and the order of the search result list displayed in the search result display region 112 is in descending order with respect to the update date displayed in the update date display column 113.

  By arranging in this order, users who think that the usefulness of a web page and the newness of its update date are proportional to each other in the criteria for determining the web page to access should access from the top. , Increase convenience.

  Similarly, a user who wants to know the transition of a matter in time series can access the search result list in order from the top by clicking the ascending order button 115.

  The rearrangement based on the update date is performed on the search result stored in the search result storage unit 26. That is, the search is not performed again, and the search result that has been efficiently sorted can be provided to the user.

  The search results stored in the search result storage unit 26 are deleted after a predetermined time has elapsed (for example, 30 minutes).

  FIG. 10 is a display example of a search acceptance screen when the search condition performed in the description of FIG. 8 is further added with a page update date restriction. In the search reception screen 100, “2004.3.1” is newly input in the start date input field 103, and “2004.4.20” is input in the end date input field 104.

  That is, on the search reception screen 100 shown in FIG. 10, the search execution button 105 is clicked to search for the keyword “science” and “update date from March 1, 2004 to April 30, 2004”. It is shown that the search for the web page as a condition is performed, and the update date of the web page corresponding to the search is also displayed in the search result.

  When the search execution button 105 is clicked on the search reception screen 100 shown in FIG. 10, the input information determination unit 12 displays the display selection “display”, the execution instruction “search”, the keyword “science”, and the update date. The restriction start date “2004.3.1” and the end date “2004.4.20” are received (S1).

  Also, since the execution instruction is “search” (search in S2), the display selection “display”, the keyword “science”, the start date “2004.3.1” of the update date restriction, and the end date “ 2004.30 "is transmitted to the search unit 13 (S3).

  Since the display selection received from the input information determination unit 12 is “display” (required in S4), the search unit 13 stores the page content information 41 stored in the page content information storage unit 40 and the page update date information storage. The page update date information 51 stored in the unit 50 is combined with the page URL as a key to generate search combination information (S6). The search combination information includes all of the page content information 41 and the page update date information 51.

  Here, in the example of FIG. 10, since the restriction is based on the update date (there is a restriction in S7), the keyword “Science” and the last update date of the search combination information are targeted for the search combination information. The search is executed under the condition “after March 1, 2004 and before April 30, 2004”, the above-mentioned rank data is added to the search result, and the result is transmitted to the rearrangement unit 14 (S9).

  The search result includes the page URL of the web page corresponding to the search result extracted from the search combination information, the title, the display text, the last update date, and the rank data.

  Thereafter, the server device 10 performs the same processing as the rearrangement processing (S11) and search result list transmission processing (S12) described with reference to FIG. 8, and the search results are displayed on the client device 201 (202). .

  FIG. 11 is a display example of a screen on the client device 201 (202) after execution of a search that is limited by the update date of the web page, according to the above-described operation flow.

  On the search result display screen 110, a search status display column 111 for displaying the search condition and the number of search results is displayed. The keyword “science” and the update date “from March 1, 2004 to April 30, 2004” are displayed. As a result of executing the search under the search condition “”, it is shown that three cases are applicable.

  A search result list is displayed in the search result display area 112, and an update date of the web page corresponding to the search is displayed in the update date display column 113. The search condition “2004 3” is displayed. This corresponds to the condition “from January 1 to April 30, 2004”.

  As described above, since the search condition can be limited by the update date of the web page, a user who can limit the update date of the web page to be searched in advance to a certain period can be used in the search result. Display can be omitted, and useful information can be efficiently acquired.

  In particular, when a user searches for desired information, when a keyword that is suitable for the search but is not optimal is used as a search condition, the update date is limited and the update date is not limited. As a result, search results are narrowed down, and useful information can be efficiently acquired.

  For example, a user who wants to know a theory in the field of mathematics and knows the field and the year in which it was published, but does not know the formal name of the theory. By performing the search up to December 31 and performing a search, the search result can be narrowed down and the time until the information can be accessed can be shortened.

  Here, the search result list in the search result display area 112 shown in FIG. 11 can be rearranged in descending order or ascending order with respect to the update date by clicking the descending order button 114 and the ascending order button 115 described above. is there.

  In the above description, if the display selection received by the search unit 13 from the input information determination unit 12 is “not display” (not required in S4), the search unit 13 is stored in the page content information storage unit 40. The keyword search for only the page content information 41 is performed, the above-mentioned rank data is added to the search result not including the last update date, and the result is transmitted to the sorting unit 14 (S5).

  The rearrangement unit 14 performs rearrangement based on the received rank data (S11), and transmits the result to the search result list transmission unit 15. The search result list sending unit 15 sends a search result list not including the update date of the web page corresponding to the search to the client device 201 (202) (S12).

  Next, processing related to collection of web page information performed by the search result providing system 1 will be described below.

  FIG. 12 shows a flow of operations when the server apparatus 10 accesses another server apparatus that publishes a web page via the network 200 and collects information on the web page. The collection of the web page information is periodically performed at predetermined intervals, and the web page information collected here is a target of the search performed by the user.

  The collection / analysis unit 22 collects the page URLs of all the individual page information of the collection page information 31 stored in the collection page information storage unit 30 and the URLs of web pages other than the page URL in the text. The URL is extracted as a URL (S21), and the following processing is sequentially performed on each URL to be collected.

  As described above, the URL extracted from the text is also set as the collection target URL, so that it is possible to collect the web page in which the individual page information does not exist in the collection page information 31, and the individual page is included in the collection page information 31. It is possible to collect a page related to the web page on which the information exists.

  As a result, by repeating the collection of the web pages, the number of web pages to be searched can be increased, and convenience for the user is increased.

  The collection / analysis unit 22 transmits an HTTP (Hypertext Transfer Protocol) header request to one of the collection target URLs (hereinafter referred to as “target URL”), and the request is sent from the server device indicated by the target URL. The response header is transmitted as a response to the response message, and includes a response header in which various information of the web page at the location indicated by the URL is described (S22).

  The response header includes information on whether or not the web page exists in the target URL. If the web page exists and can be acquired (YES in S23), the last in which the update date of the web page is recorded from the response header. Check whether the modified field can be acquired. If it can be acquired (YES in S24), the response header and the target URL are transmitted to the page comparison unit 23. Here, if the web page cannot be acquired (NO in S23), the process for the target URL is terminated. A case where the Last-modified field cannot be acquired (NO in S24) will be described later.

  The page comparison unit 23 updates the date (hereinafter referred to as “acquisition update date”) described in the Last-modified field from the response header (hereinafter referred to as “acquisition response header”) received from the collection / analysis unit 22. To extract. Further, the target URL and the page URL recorded in the collected page information 31 are compared and contrasted, and the last update date of the specified individual page information (hereinafter referred to as “specific individual page information”), the acquisition update date, Are compared (S25).

  Here, when there is no specific individual page information, the acquisition update date is always newer than the last update date by setting the last update date for the above comparison to “January 1, 0” ( Web page acquisition (S27) described below is performed, and web page information is newly added to the collected page information 31, the page content information 41, and the page update date information 51. (S28)

  When the acquisition update date is newer than the last update date (YES in S26), that is, when individual page information is not recorded in the collected page information 31, or when a web page recorded as individual page information is updated The page comparison unit 23 transmits the target URL to the collection / analysis unit 22.

  If the acquisition update date is older than the last update date (NO in S26), the process for the target URL ends.

  The collection / analysis unit 22 acquires a web page by transmitting an HTTP get request to the target URL received from the page comparison unit 23, and transmits the web page to the page comparison unit 23 (S27).

  The page comparison unit 23 extracts the title and the text from the web page received from the collection / analysis unit 22. When the specific individual page information exists in the collection page information 31, the page comparison unit 23 is each item of the specific individual page information. Then, the last update date, the title and the text are updated to the previously acquired acquisition update date and the extracted title and text, respectively (S28).

  Further, when there is no specific individual page information, the target URL and the acquisition update date are set as the page URL and the last update date, respectively, and the page URL, the last update date, the extracted title, and the text are a set of individual page information. And is written in the collected page information 31. That is, the individual page information is newly added to the collected page information 31 (S28).

  Further, the page comparison unit 23 transmits the target URL and the extracted title and text to the page content acquisition unit 24 regardless of whether or not the specific individual page information exists in the collected page information 31, and the target URL The acquisition update date is transmitted to the page update date acquisition unit 25 (S29).

  The page content acquisition unit 24 analyzes the text received from the page comparison unit 23, extracts a plurality of keywords that are words characterizing the text from the appearance frequency of each word in the text, and the keywords in the title and text. The importance of keywords is determined from the number of appearances for each, and the keywords are arranged in descending order of importance. In addition, the display body is extracted by discarding a predetermined number of characters from the beginning of the body.

  Further, there is individual content information (hereinafter referred to as “specific individual content information”) specified by comparing and comparing the target URL received from the page comparison unit 23 with the page URL recorded in the page content information 41. Updates the keywords, titles, and display text, which are the items of the specific individual content information, respectively, to the arranged keywords, the title received from the page comparison unit 23, and the extracted display text. Perform (S30).

  When the specific individual content information does not exist, the target URL received from the page comparison unit 23 is set as the page URL, and the page URL, the title received from the page comparison unit 23, the arranged keyword, and the display text are a set. Is written in the page content information 41. That is, the individual content information is newly added to the page content information 41 (S30).

  The page update date acquisition unit 25 compares and contrasts the page URL received from the page comparison unit 23 with the page URL recorded in the page update date information 51, and specifies individual update date information (hereinafter referred to as “specific individual update date”). If the information is referred to as “information”), update is performed with the last update date of the specific individual update date information as the acquisition update date received from the page comparison unit 23 (S30).

  When the specific individual update date information does not exist, the target URL received from the page comparison unit 23 and the acquired update date are set as a set of individual update date information including the page URL and the last update date, respectively. 51 is written. That is, the individual update date information is newly added to the page update date information 51 (S30).

  Further, when the collection-analysis unit 22 cannot acquire the Last-modified field from the acquired response header (NO in S24), the Web page is acquired by sending a get request to the target URL, and the target URL and The web page and the date (acquisition date) when the web page was acquired are transmitted to the page comparison unit 23 (S31).

  The page comparison unit 23 extracts the title and text from the web page received from the collection / analysis unit 22.

  Further, the target URL and the page URL recorded in the collected page information 31 are compared and contrasted. When the specific individual page information exists (YES in S32), the text of the specific individual page information and the extracted text described above are included. (Hereinafter referred to as “acquired text”) (S33).

  If there is a difference between the text of the specific individual page information and the acquired text (YES in S34), it is considered that the web page recorded as the individual page information in the collected page information 31 has been updated, and the specific individual page information The last update date, the title, and the text, which are the items, are updated to the acquisition date, the extracted title, and the acquired text received from the collection / analysis unit 22, respectively (S28).

  If there is no difference between the text of the specific individual page information and the acquired text (NO in S34), the web page recorded as the individual page information in the collected page information 31 has not been updated. Therefore, the process for the target URL is terminated.

  If the specific individual page information does not exist (NO in S32), the target URL, the acquisition date received from the collection / analysis unit 22, the extracted title, and the acquisition text are respectively the page URL and the last update date. And the title and the text as a set of individual page information are written in the collected page information 31 (S28). That is, the individual page information is newly added to the collected page information 31.

  That is, if the Last-modified field cannot be acquired from the acquired response header (NO in S24), the update date of the web page existing in the target URL cannot be acquired, but the acquired web page If there is a difference between the previously obtained text and the previously obtained text, it is considered that the text has been updated, and the date when the web page was acquired is set as the update date.

  In this way, the user can be informed of the update date as a guide for determining the usefulness of the web page.

  Further, the page comparison unit 23 transmits the target URL and the extracted title and text to the page content acquisition unit 24 regardless of whether or not the specific individual page information exists in the collected page information 31, and the target URL And the acquisition date are transmitted to the page update date acquisition unit 25 (S29).

  Thereafter, the page content acquisition unit 24 and the page update date acquisition unit 25 update the page content information 41 and the page update date information described above (S30).

  As described above, the search result providing system, which is an embodiment of the present invention, can accept a keyword search targeting the contents of a web page from a user, and the web page corresponding to the search as a search result. The update date of can also be displayed.

  Therefore, by referring to the displayed update date, the user can determine the usefulness of the content of the web page before actually accessing the web page, and efficiently information desired by the user. Can be accessed.

  In addition, since the search result list can be sorted in descending order or ascending order with respect to the update date, if the user thinks that the newer the update date of the web page is, the higher the usefulness for himself / herself, On the other hand, if you want to know the transition of a certain matter in chronological order, you can access it sequentially from the top web page of the search result list by ascending order. It is possible to provide highly-relevant search results.

  The above-described sorting of the search results is performed on the search results stored in the search result storage unit 26. Therefore, it is possible to provide a search result that is efficiently sorted to the user without performing a search again.

  Furthermore, since the update date of the web page can also be a search target, if the user knows the time when the desired information was announced or occurred, a specific period including that time, By designating the update date of the web page as a target search condition, useless search results can be omitted, and the time required to access information desired by the user can be shortened.

  In particular, when a user searches for information desired by the user, it is useful for the user because it plays a role of narrowing the search results when a keyword that is suitable for the search but not optimal is used as a search condition. It is effective as one of means for efficiently obtaining information.

  The search result providing system, which is an embodiment of the present invention, has been described above, but the present invention is not limited to the above embodiment.

  In the search result display screen described with reference to FIGS. 8, 9, and 11, there may be a column for receiving a search condition and an execution instruction from the user. FIG.

  The search result display screen 120 shown in FIG. 13 is an example of a screen displayed on the client device 201 (202) after executing a search under the conditions entered and selected in the search acceptance screen 100 shown in FIG. It is.

  A search condition input field 121 and a search result list display area 112 are displayed. The search condition input field 121 includes a keyword input field 101, an update date display radio button 102, a start date input field 103, and an end date. An input field 104 and a search execution button 105 are included.

  The keyword input field 101 displays the keyword “science” as a search condition, and “display” is selected for the update date display radio button 102. That is, the input and selection made by the user on the search reception screen 100 shown in FIG. 7 are taken over, and the search conditions that are the basis of the search results displayed in the search result list display area 112 are displayed.

  As described above, the search result display screen 110 can also input, select and execute the search condition, so that the next search can be performed immediately without returning to the search reception screen 100 after the search is executed. Convenience increases.

  For example, when a user performs a search for only keywords and feels that there are too many search results, the search keyword is added to the keyword input field, and the dates to the start date input field 103 and the end date input field 104 Can be narrowed down by the keyword to which the search result has been added or the update date of the web page.

  In other words, after seeing the search results by keyword, you can decide whether to add keywords or restrict by update date, and you can narrow down the search results immediately, which increases convenience for users. Become.

  In addition, in the start date input field 103 and the end date input field 104 shown in FIGS. 7, 10, and 13, a date such as “2004.4.30” is accepted. Alternatively, an input of only the year and month such as “2004. 4” may be accepted.

  In this case, for example, when the input information determination unit 12 has a certain standard and “2004” is input to the start date input field 103, the input information determination unit 12 sets “2004.1.1”. If the date is input to the end date input field 104, for example, “2004. 4” is input, the input information determination unit 12 adds “2004.4.30” to the date. The search unit 13 may be transmitted.

  Further, only the start date input field 103 or the end date input field 104 may be accepted. For example, when “20033.4” is input only in the start date input field 103, the input information determination is performed. The unit 12 supplements the date “2003.4.1” and transmits it to the search unit 13, and the search unit 13 may perform a search under the search condition “after April 1, 2003”.

  By doing so, when the user thinks that the restriction on the update date of the web page may be rough, the labor related to the user's input can be reduced.

  Further, supplementation of the month and day by the input information determination unit 12 may be performed by the search unit 13.

  In addition, a search acceptance screen may be provided in which a user displays only one field for inputting a date for restriction of the update date, instead of two fields of a start date input field 103 and an end date input field 104. Often, FIG. 14 is a display example of a search acceptance screen in which only one field for inputting a date for limiting the update date is displayed.

  As shown in FIG. 10, a keyword input field 101 and an update date display radio button 102 are displayed on the search reception screen 100 shown in FIG. 14, and a date that serves as a reference for restriction (hereinafter referred to as “reference date”). .) Can be set in four ways: “Limited to the following”, “Limited to the previous”, “Exclude the following”, and “Exclude the previous”. A restriction type radio button 107 is displayed.

  That is, as shown in FIG. 14, when “2003.12.1” is entered in the reference date input field 106 and the restriction type radio button 107 is selected as “Previous” and “Omit”, the update date is set. The restriction period means "Omit dates before December 1, 2003", and the result after the search is executed is a web page whose update date is a date after December 2, 2003 It will be limited to.

  In this way, the date can be input with only one reference date, and since the user can explicitly set the limit period, when limiting the renewal date, This is an easy-to-use search acceptance screen for a user who wants to decide only before or after a certain reference date.

  In the reference date input field 106, it is also possible to accept input of only the year, such as “2004”, or only the year and month, such as “2004.4”, and supplement the month and day as described above. The input information determination unit 12 or the search unit 13 may perform this.

  Further, the collected web page information is recorded in the collected page information 31, the page content information 41, and the page update date information 51. These are retrieved and retrieved by a relation using the page URL as a key. As long as the data necessary for sending the data can be extracted or written, it may be divided into four or more files and recorded, or may be integrated into one file.

  In addition, in the operation in which the server apparatus 10 described with reference to FIG. 12 collects web page information, if the Last-modified field does not exist in the response header, the update date of the web page is determined. As a method, the existence of a difference between the acquired web page and the body text of the same web page previously acquired is detected, and if there is a difference, it is considered that there is an update and the acquisition date of the web page is updated. The technique of taking the day is taken.

  This is only for the purpose of providing the user with a guideline for the update date of the web page, so the comparison target may be a part of the text, for example, the comparison target is a predetermined number of characters from the beginning of the text, Alternatively, the number of characters at the beginning and end may be set, or only the number of characters in the body may be compared.

  In addition, the target for detecting the presence of the difference is not limited to the body of the web page. For example, to identify the Content-Length field that is information on the file size of the web page in the response header and the identity of the web page. A method of comparing the Etag field, which is the ID of, with a previously acquired one may be used. In this case, the above-described fields may be stored in the collection page information 31.

  The above-described method for determining whether or not a web page has been updated by comparing a part of the text or comparing each field in the response header is a comparison of the number of characters smaller than that of the text, and thus is performed by the server device 10. The processing load related to web page collection can be reduced, and the processing speed of the entire server apparatus 10 can be improved.

  In addition, a plurality of methods for discriminating the update date may be combined, and in that case, the reliability of the update date can be improved.

  The search result providing apparatus according to the present invention can be applied to a server apparatus or the like of a search site for a web page published on the Internet.

It is a general-view figure which shows the structure of the search result provision system of embodiment. It is a functional block diagram which shows the functional structure of a server apparatus. It is a figure which shows an example of the collection page information stored in the collection page information storage part. It is a figure which shows an example of the page content information stored in the page content information storage part. It is a figure which shows an example of the page update date information stored in the page update date information storage part. It is a flowchart of the process regarding the search and rearrangement which the server apparatus 10 performs. It is a figure which shows an example of a search reception screen. It is a figure which shows an example of a search result display screen. It is a figure which shows an example of the search result display screen which rearranged the search result about the update date in descending order. It is a figure which shows an example of the search reception screen into which the search condition which restrict | limits an update date was input. It is a figure which shows an example of the search result display screen where the update date was restrict | limited. It is a flowchart of the process regarding the collection of the information of the web page which the server apparatus 10 performs. It is a figure which shows an example at the time of providing the search condition input column in the search result display screen. It is a figure which shows another example of a search reception screen.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Search result provision apparatus 10 Server apparatus 11 Public I / F part 12 Input information judgment part 13 Search part 14 Rearrangement part 15 Search result list transmission part 21 Collection I / F part 22 Collection / analysis part 23 Page comparison part 24 Page content acquisition unit 25 Page update date acquisition unit 26 Search result storage unit 30 Collected page information storage unit 31 Collected page information 40 Page content information storage unit 41 Page content information 50 Page update date information storage unit 51 Page update date information 100 Search acceptance Screen 101 Keyword input field 102 Update date display radio button 103 Start date input field 104 End date input field 105 Search execution button 106 Reference date input field 107 Restriction type radio button 110, 120 Search result display screen 111 Search status display field 112 Search result Display area 113 Update date display Field 114 Descending button 115 Ascending button 121 Search condition input field

Claims (10)

A search result providing device for searching a web page and providing a search result,
A receiving means for receiving a search keyword input and a sorting instruction from a user;
Search means for searching a web page published on the network using the search keyword as a search condition;
Identification information acquisition means for acquiring identification information for identifying the web page;
Update information acquisition means for acquiring update information of the web page;
A result storage means for storing result information including a set of identification information of the web page corresponding to the search by the search means and update information of the web page;
Reordering means for reordering the result information stored in the result storage means in descending or ascending order with respect to the update information based on the reordering instruction accepted by the accepting means;
A search result providing apparatus comprising: result information sending means for sending the result information sorted by the sorting means. The update information is an update date of the web page, or a date considered to be updated,
The accepting means further accepts an input of time limit information for restricting the web page searched by the searching means with the update information,
2. The search according to claim 1, wherein the search means further searches the web page using the search keyword and the limit period information as a search condition when the limit period information is input. Result providing device. The search result providing apparatus further includes web page information collecting means for collecting web page information including contents of a web page published on a network and update information of the web page,
The search means searches the web page information collected by the web page information collection means by the search keyword,
The identification information acquisition means acquires identification information from the web page information collected by the web page information collection means,
The search result providing apparatus according to claim 1, wherein the update information acquisition unit acquires update information from the web page information collected by the web page information collection unit. The update information is an update date of the web page, or a date considered to be updated,
The accepting means further accepts an input of time limit information for restricting the web page searched by the searching means by the update information,
The search result providing apparatus according to claim 3, wherein the search means searches the web page information collected by the web page information collection means using the search keyword and the limited period information as search conditions. The search result providing apparatus further includes:
Web page information storage means for storing the web page information;
The update information acquisition unit compares the update information of the web page acquired from the web page information with the update information included in the past web page information of the web page stored in the web page information storage unit, The search result according to claim 3, further comprising: a comparison unit that rewrites the past web page information with new web page information of the web page when update information of the web page is new. Providing device. The comparison means further specifies the web page information of the web page collected by the web page information collection means when the update information acquisition means cannot obtain the update information of the web page from the web page information. A part and a specific part of the past web page information of the web page stored in the web page storage means, and if there is a difference, the web page is regarded as updated, and the web page The date when the web page information was collected last is the update date of the web page, and the web page information of the web page stored in the web page information storage means is rewritten with new web page information of the web page. The search result providing apparatus according to claim 5, wherein: The search result providing apparatus according to claim 6, wherein the specific part is a part or all of the web page information. Each identification information of the result information is given a rank in advance,
The search result providing apparatus according to claim 1, wherein the rearranging unit rearranges the result information based on a rank assigned to each identification information. A search result providing method for searching a web page and providing a search result,
A reception step for receiving a search keyword input and a sorting instruction from a user;
A search step of searching a web page published on the network using the search keyword as a search condition;
An identification information acquisition step of acquiring identification information for identifying the web page;
An update information acquisition step of acquiring update information of the web page;
A storage step of storing, in a storage unit, result information including a set of identification information of the web page corresponding to the search by the search unit and update information of the web page;
Based on the rearrangement instruction received in the reception step, the rearrangement step of rearranging the result information stored in the storage unit in descending or ascending order with respect to the update information;
And a result information sending step of sending the result information sorted in the sorting step. A program for searching web pages and providing search results,
A reception step for receiving a search keyword input and a sorting instruction from a user;
A search step of searching a web page published on the network using the search keyword as a search condition;
An identification information acquisition step of acquiring identification information for identifying the web page;
An update information acquisition step of acquiring update information of the web page;
A storage step of storing, in a storage unit, result information including a set of identification information of the web page corresponding to the search by the search unit and update information of the web page;
Based on the rearrangement instruction received in the reception step, the rearrangement step of rearranging the result information stored in the storage unit in descending or ascending order with respect to the update information;
A program for causing a computer to execute a result information sending step for sending the result information sorted in the sorting step.

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