JP2010225035A - Device, method, and program for searching information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve search to precisely, appropriately and surely search for service information that a user wants to obtain from a prescribed information group as the object of search without selecting a search method. <P>SOLUTION: An information search device 10 accepts input of a search keyword for searching service information, extracts the service information by referring to a search information storage part F11 based on the accepted search keyword, specifies a word recommended as a search keyword for narrow-down search from among words included in the specified service information, determines the specified word as a recommended search keyword (recommended word), accepts the selection of the recommended search keyword to be used as the search keyword for narrow-down search from among the determined recommended search keywords, specifies and extract the service information by referring to a search information storage part F11 based on the search keyword and the recommended search keyword, and outputs the extracted service information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an information search apparatus, an information search method, and an information search program for searching service information such as a facility corresponding to a specified search keyword from a predetermined information group to be searched.

  Conventionally, an information search device that searches for and displays store information such as gasoline stunts, convenience stores, ramen stores, hotels and inns, POI (Point Of Interest) information such as famous facility information and resort information, etc. is known. ing. There is also known a car navigation device (hereinafter referred to as “car navigation”) that has this information search device function and displays the information together with an electronic map.

  Such an information search device includes an address search to search based on the address of the search object, a telephone number search to search based on the phone number of the search object, a genre search to search based on the type and purpose of the search object, and a search There are various search functions such as a 50-sound search for searching based on the name of an object, and a search for surroundings to search for a search object from the surroundings using latitude and longitude as search keys.

  Therefore, when searching for desired service information from a predetermined information group (search data) to be searched, it is necessary for the user to select (specify) a search method as appropriate from various search functions and perform a search.

  However, in recent years, the types and purposes of search objects have been diversified and subdivided, and there are cases where it is not known by which search method desired service information can be efficiently and appropriately searched. Therefore, the search method selected by the user may not be able to find desired service information accurately and appropriately.

  Also, in such an information retrieval device, for example, it is specified by inputting a character string (keyword) that matches the attribute representing the characteristics of the service information, and is specified by sequentially scanning the contents of a plurality of text files. The desired service information is found out by cutting out the character string. Therefore, if the input character string does not match, the desired service information cannot be found, and the search result intended by the user may not be obtained.

  In view of this, several means have been proposed for appropriately searching for desired service information with high accuracy. For example, in setting a destination, a database in which one or more keywords are associated in advance for each genre is provided, and a genre corresponding to a specified keyword is searched based on the database and displayed as candidates. There is a means for setting a selected facility as a destination (see Patent Document 1).

  In addition, there is provided means for previously storing a keyword group related to the map name, and when a map name is input, the keyword group related to the input map name is selected and displayed, and a desired keyword is selected therefrom. There is also a means that enables searching for information related to the input map name by selecting (see Patent Document 2).

  Furthermore, the search condition of the facility is set based on the input from the user, and by setting the search history of the set search condition, the search condition is set based on the setting history of the search condition registered in the past, There is also means for searching for facilities that meet the set search conditions (see Patent Document 3).

JP 2002-297028 A JP-A-2005-84291 JP 2006-194817 A

  However, in any of the techniques described in Patent Documents 1 to 3, the user is burdened with an operation of appropriately selecting a search method from various search functions, and the search method is selected. Therefore, it is not possible to find desired service information accurately and appropriately.

  On the other hand, there is something that narrows down by adding search keywords sequentially without requiring an operation such as selecting a search method, but there is a possibility that there is no search result depending on the combination, which is also desirable The service information cannot be accurately and appropriately searched.

  At present, there has not been proposed a search means that can accurately and reliably find service information desired to be acquired without giving the user a load in an operation of selecting a search method.

  In order to solve the above problem, the present invention can perform a search for accurately and appropriately searching for service information desired to be acquired from a predetermined information group to be searched without selecting a search method. The purpose is to be able to.

  The information search device of the present invention is an information search device for searching service information such as a facility corresponding to a specified search keyword from a predetermined information group to be searched, and stores the service information. Means, a search keyword receiving means for receiving an input of a search keyword for searching for the service information, and identifying service information with reference to the service information storage means based on the search keyword received by the search keyword receiving means. The first search means to be extracted and the word recommended as the search keyword for the narrowing search are specified from the words included in the service information specified by the first search means, and the specified word is recommended. Recommended search keyword determination means for determining a keyword and the recommended search keyword determination means Recommended search keyword selection receiving means for receiving selection of a recommended search keyword to be used as a search keyword for a refined search from among the recommended search keywords determined by the search keyword, the search keyword received by the search keyword receiving means, Based on the recommended search keyword accepted by the recommended search keyword selection accepting means, the service information storage means is referred to identify and extract service information, and the service information extracted by the second search means Service information output means for outputting.

  Since it comprised as mentioned above, it becomes possible to perform the search which searches the service information which it wants to acquire accurately and appropriately and reliably from the predetermined information group used as a search object, without selecting a search method. .

  The recommended search keyword determination means may be configured to identify a word recommended as a search keyword for a narrow search according to a predetermined recommended search keyword search rule.

  The recommended search keyword determination means is configured to specify words used in a predetermined number or more of service information among the service information specified by the first search means as words recommended as search keywords for narrowing search. It may be.

  The recommended search keyword determination unit may be configured to specify a word that is used a predetermined number of times or more in the service information specified by the first search unit as a word recommended as a search keyword for a narrow search. .

  The information search method of the present invention is an information search method for searching service information such as a facility corresponding to a specified search keyword from a predetermined information group to be searched for searching for the service information. A search keyword receiving process for receiving the search keyword input, and a service information storage means for storing the service information based on the search keyword received in the search keyword receiving process to identify and extract service information One search process and a word recommended as a search keyword for a refined search are identified from the words included in the service information identified in the first search process, and the identified word is determined as a recommended search keyword Recommended search keyword determination process to be performed and the recommended search keyword determined in the recommended search keyword determination process From among the recommended search keyword selection acceptance process for accepting selection of a recommended search keyword to be used as a search keyword for a refined search, the search keyword accepted in the search keyword acceptance process, and the recommended search keyword selection acceptance process Based on the received recommended search keyword, the service information storage means is referred to identify and extract the service information, and the service information output that outputs the service information extracted in the second search process Processing.

  The information search program of the present invention is an information search program for searching service information such as a facility corresponding to a specified search keyword from a predetermined information group to be searched, and the computer stores the service information. A search keyword receiving process for receiving an input of a search keyword for searching, and based on the search keyword received in the search keyword receiving process, service information is identified with reference to service information storage means for storing the service information, From the first search process to be extracted and the words included in the service information specified in the first search process, a word recommended as a search keyword for narrowing search is specified, and the specified word is recommended search Recommended search keyword determination processing to be determined as a keyword, and recommended search keyword determination processing The recommended search keyword selection acceptance process for accepting selection of the recommended search keyword to be used as the search keyword for the refined search, the search keyword accepted in the search keyword acceptance process, and the recommendation Based on the recommended search keyword received in the search keyword selection receiving process, the service information storage means is referred to identify and extract service information, and the service extracted in the second search process This is for executing service information output processing for outputting information.

  According to the present invention, it is possible to perform a search for accurately and appropriately searching service information desired to be acquired from a predetermined information group to be searched without selecting a search method.

It is a block diagram showing an example of composition of an information search system using an information search device in an embodiment of the present invention. It is the schematic which shows the navigation apparatus implement | achieved by using the information search device in embodiment of this invention for an information search system. It is a block diagram which shows the example of a structure of the information search device in embodiment of this invention. It is explanatory drawing which shows the example of the service information memorize | stored in the memory | storage part with which the information search device which concerns on this invention is provided. It is a flowchart which shows the example of an information search process. It is explanatory drawing which shows the example of a search result screen. It is explanatory drawing which shows the example of a search result screen. It is explanatory drawing which shows the example of a recommendation word selection screen. It is explanatory drawing which shows the example of a search result screen.

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

  FIG. 1 is a block diagram illustrating an example of an information search system. As shown in FIG. 1, the information search system of this example includes an information search device 10, a display unit 20, and an input unit 30. The information search device 10 is a device that searches for service information such as a facility corresponding to a specified character string from a predetermined information group to be searched. The display unit 20 is a display (monitor) that outputs and displays a search result obtained by the information search apparatus 10. The input unit 30 is a command input button for giving various instructions to the information search apparatus 10, and includes a character input button 31, a search execution button 32, and the like as shown in FIG.

  FIG. 2 is a schematic diagram showing a navigation device 1 realized by using this system. In FIG. 2, the input unit 30 (31, 32) is stacked on the screen of the display unit 20. The character input button 31 performs a process of transmitting character input information for searching for relevant information. As the character input button 31, for example, a GUI (Graphic User Interface) screen simulating a Hiragana keyboard is displayed on the display unit 20, and the user selects the Hiragana one character at a time with the cursor or finger on the GUI screen. A desired character string can be input.

  In FIG. 2, a character input button 31 is a button for inputting various characters of “A”, “KA”, “SA”..., A button for inputting a punctuation mark “.”, A button for inputting a reading “,”, It is composed of buttons for inputting “−”.

  The display unit 20 displays a display column 21 for outputting and displaying character information input from the character input button 31. In FIG. 2, a character string such as “soup curry” is displayed in the display field 21.

  Further, the display unit 20 is switched to a “katakana” button for inputting a katakana character, an “ABC” button for inputting a Roman character, a lowercase character input, and a muddy point “” or a semi-voiced point “°” is inputted. A “small” button for inputting numbers, a “123” button for inputting numbers, and the like are provided.

  The search execution button 32 performs a process of transmitting search execution instruction information for requesting a search execution based on a character string composed of received character information. In FIG. 2, the search execution button 32 includes a “search” button.

  In addition, the present system may include a positioning device 40 in order to specify the current position. The positioning device 40 performs processing for measuring the current position. The position can be measured by a GPS receiver, for example. A GPS receiver receives GPS signals emitted from GPS satellites, measures the distance (pseudorange) between the GPS satellites and the GPS receiver itself, and receives GPS signals simultaneously by receiving GPS signals from multiple satellites. The current position (GPS positioning solution) of the aircraft itself is calculated.

  FIG. 3 is a block configuration diagram illustrating an example of the information search apparatus 10. As shown in FIG. 3, the information search device 10 includes a search information storage unit F <b> 11, a search keyword receiving unit 11, a search unit 12, a recommended word determination unit 13, and a control unit 14. Reference numeral 15 in the figure is a bus for transmitting control signals, data, and the like in the information retrieval apparatus 10.

  The information search apparatus 10 may be an information processing apparatus, and is realized by, for example, a mobile personal computer, a PND (Personal Navigation Device), a dedicated device, a mobile phone, or the like. Although not shown, the information search device 10 includes a CPU (Central Processing Unit), a program storage unit, an input device such as a key button, an output device such as a display, an OS (Operating System), and the like.

  Although not shown, the information search device 10 includes a CPU (Central Processing Unit), a program storage unit, an input device such as a mouse, keyboard, or key button, an output device such as a display, an OS (Operating System), and the like. .

  The CPU is means for controlling and controlling each component of the information search apparatus 10 according to a computer program stored in the program storage unit and executing program processing. The program storage unit is constituted by a ROM (Read Only Memory), a RAM (Random Access Memory), or the like, and is a means for storing various computer programs (such as an information search program) used by the information search apparatus 10.

  The search information storage unit F11 is a storage medium that stores service information to be searched. "Service information" refers to POI (Point Of Interest) information such as store information such as gasoline stunts, convenience stores, ramen stores, hotels and inns, famous facility information, and resort information. Specifically, the “service information” includes, for example, as shown in FIG. 4, the name of a search target such as a store or a facility, how to read the name, and the genre to which the search target belongs (gourmet, Asian, curry, etc.) , Location information (latitude / longitude) indicating the position of the search object, coordinate accuracy, telephone number, address, traffic guide to the search object, business period, business hours, closed days, store The information includes the price of menus and services provided by the facility, the presence / absence of a parking lot, the number of parking lots that can be accommodated, the parking fee, and articles describing the search target profile.

  The search keyword receiving unit 11 performs a process of receiving an input of a search keyword (character string) for searching for service information. When the search keyword is received, the search keyword receiving unit 11 transmits the received search keyword to the search unit 12.

  The search unit 12 performs various types of search processing such as processing for identifying and extracting service information based on the search keyword received by the search keyword receiving unit 11. The search unit 12 performs a process of extracting the POI corresponding to the search keyword and outputting the extracted service information.

  The recommended word determination unit 13 performs a process of determining a recommended word according to an instruction from the user, using the search result in the search unit 12. “Recommended word” means a search keyword for performing a combined search together with a search keyword specified by the user.

  The control unit 14 includes a CPU, a ROM, a RAM, and the like, and controls and controls each component of the information search apparatus 10 according to a program stored in the program storage unit, and executes a program process. The control unit 14 performs control to output the service information searched by the search unit 12 and display the service information on the display 20. When the service information output by the search unit 12 is text data or image data, this is displayed on the display 20.

Next, the operation of the information search apparatus 10 of this example will be described.
FIG. 5 is a flowchart illustrating an example of information search processing executed by the information search apparatus 10. Here, a case where the user X searches for a soup curry store using a recommended word will be described as an example. Note that detailed descriptions of processes not particularly related to the present invention may be omitted.

  In the information search process, the search keyword receiving unit 11 first determines whether or not an input of a search keyword for searching for service information has been received (step S10). Here, it is assumed that “soup curry” is accepted as a search keyword.

  When the input of the search keyword is received by the search keyword receiving unit 11 (Y in Step S10), the search unit 12 searches the search information stored in the search information storage unit 11 based on the received search keyword ( With reference to FIG. 4, the service information including the search keyword is specified, and the title (for example, name) of the specified service information is extracted (step S11). That is, in step S11, the search process is executed by specifying service information in which one of the items of the service information includes the search keyword “soup curry” among the service information in the search information. The

  And the control part 14 performs the process which displays the search result screen containing the title of the service information extracted by the search part 12 on the display 20 with which the information search device 10 was equipped (step S12). FIG. 6 is an explanatory diagram illustrating an example of a search result screen. The search result screen includes a display area for displaying the search keyword, a display area 101 for displaying the title of the extracted service information that is the search result, and a change button 102 for changing the display content in the display area 101. A narrow-down button 103 that is pressed when performing a narrow-down search is provided.

  Here, as shown in FIG. 6, it is assumed that 22 pieces of service information are retrieved, and the titles of three pieces of service information such as “Soup Curry Northern Country” are displayed so as to be changeable. When the control unit 14 accepts a narrowing selection, for example, when the user X presses the narrowing down button 103 with the finger P on the search result screen (Y in step S13), the control unit 14 determines whether or not to use the recommended word on the search result screen. Confirm with X (step S14). Specifically, in step S14, for example, as shown in FIG. 7, the control unit 14 is pressed when a keyword addition button 104 that is pressed when a search keyword is additionally input and when a recommended word is used. A recommended word button 105 is displayed on the search result screen.

  Next, when the recommended word button 105 is pressed (Y in step S15), the recommended word determination unit 13 is identified in step S11 in the search information (see FIG. 4) stored in the search information storage unit 11. With reference to the service information, a word that matches a predetermined recommended word search rule is searched from words used in the service information, and the searched word is determined as a recommended word (step S16).

  The “recommended word search rule” is, for example, a word used in service information of a predetermined number (for example, 2, 5, etc.) or more out of the service information specified in step S11 as a recommended word. It is a rule. The “recommended word search rule” is a rule that, for example, a word that has been used a predetermined number of times (for example, 5 times, 10 times, etc.) in the service information specified in step S11 is used as a recommended word. May be. Furthermore, the “recommended word search rule” may be a rule that the genre name in the service information specified in step S11 is a recommended word.

  In addition to the above, the nearest station may be identified from the current position measured by the positioning device 40, and the nearest station name may be used as the recommended word. Furthermore, a place name around the current position measured by the positioning device 40 may be specified, and the area name may be used as a recommended word. In addition, when the route is being guided, the region name around the destination and the region name around the waypoint may be used as the recommended word. In addition, according to the genre of the search keyword specified first, “Recommended word” may include “average budget”, distance from the current position (for example, 1 km around), “pet allowed”, “parking available”, etc. Also good.

  When the recommended word is determined, the control unit 14 performs a process of displaying a recommended word selection screen on which the recommended word determined by the recommended word determining unit 13 is displayed on the display 20 provided in the information search device 10. (Step S17). FIG. 8 is an explanatory diagram illustrating an example of a recommended word selection screen. The recommended word selection screen is provided with a display area 106 for displaying recommended words and a change button 107 for changing display contents in the display area 101.

  Here, as shown in FIG. 8, it is assumed that 32 words are determined as recommended words, and 14 words such as “handmade” are displayed in a changeable manner. When the control unit 14 accepts selection of a recommended word by the user X pressing one of the recommended words with the finger P on the recommended word selection screen (step S18), the control unit 14 adds the selected recommended word to the search keyword. Processing is performed (step S19). Here, it is assumed that the recommended word “matrix” is selected and the “matrix” is added to the search keyword.

  When the selected recommended word is added to the search keyword, the search unit 12 is based on the search keyword (for example, “soup curry”) accepted in step S10 and the added search keyword (for example, “matrix”). Referring to the search information stored in the search information storage unit 11 (see FIG. 4), the service information is specified by complex search, and the title (for example, name) of the specified service information is extracted (step S20). That is, in step S20, by specifying service information in which each of the items of the service information includes both the search keywords “soup curry” and “matrix” among the service information in the search information, Search processing is executed.

  And the control part 14 performs the process which displays the search result screen containing the title of the service information extracted by the search part 12 on the display 20 with which the information search device 10 was equipped (step S21). FIG. 9 is an explanatory diagram illustrating an example of a search result screen. In the search result screen, a display area for displaying the search keyword used in the combined search, a display area 101 for displaying the title of the extracted service information as the search result, and a display content in the display area 101 are changed. Change button 102 and a narrow-down button 103 that is pressed when a narrow-down search is performed.

  Here, as shown in FIG. 9, it is assumed that two pieces of service information are retrieved and the titles of two pieces of service information such as “Magic Curry” are displayed. When the control unit 14 receives a browsing selection by the user X pressing the title of the service information with the finger P on the search result screen, for example, the control unit 14 displays the service information browsing screen (see FIG. 4) including the service information (see FIG. 4) of the selected title. (Not shown) is displayed on the display 20 provided in the information search apparatus 10 (step S22).

  When the service information browsing screen is displayed, a series of operations in the information search device 10 is completed. Note that these series of processes are executed under the control of the control unit 14.

  As described above, the information search apparatus 10 that searches for service information such as a facility corresponding to a search keyword specified from a predetermined information group to be searched includes a search information storage unit F11 that stores service information. The input of a search keyword for searching service information is received, the service information is identified and extracted with reference to the search information storage unit F11 based on the received search keyword, and the word included in the specified service information The recommended word as a search keyword for refined search is identified from among the words, the identified word is determined as the recommended search keyword (recommended word), and the search for refined search is determined from the determined recommended search keywords. Accept selection of recommended search keywords to use as keywords, search keywords and recommended search keys The service information is specified and extracted based on the search information storage unit F11, and the extracted service information is output. Therefore, a predetermined search target is selected without selecting a search method. From the information group, it is possible to perform a search for accurately and appropriately searching for service information desired to be acquired.

  That is, after the service information is specified by referring to the search information storage unit F11 based on the search keyword specified by the user, the recommended search keyword (recommended for narrowing search) from the words included in the specified service information Since the service information is specified and extracted based on the search keyword and the recommended search keyword, the user selects the recommended search keyword for the refined search after specifying the search keyword. This makes it possible to search for service information accurately and appropriately. In particular, since the recommended search keyword (recommended word) is determined from the words included in the service information specified by the search using the search keyword specified by the user, the search keyword, the recommended search keyword, As a result, it is possible to always obtain the result of the composite search based on the service information (the search is not disabled), and the service information can be searched accurately and appropriately.

  In the above-described embodiment, the information search device 10 refers to the search information storage unit F11 based on the search keyword specified by the user, specifies the service information, and then includes the word included in the specified service information. It is determined as a recommended search keyword (recommended word) for refinement search from the list, and the user is asked which one of the recommended search keywords is used, and a combined search is performed by adding the recommended search keyword selected by the user. Because it is configured, even if the search keyword for refinement does not come up for the user, it can be selected from the recommended search keyword that has been proposed, and the service information can be searched accurately and appropriately. Will be able to. In addition, since it is not necessary to input any search keyword for narrowing down (it is not necessary to input even one character), it is possible to save time for inputting and to prevent erroneous input.

  In the above-described embodiment, the information search apparatus 10 is configured to identify a word recommended as a search keyword for a refinement search according to a predetermined recommended search keyword search rule (recommended word search rule). , It is possible to identify an appropriate recommended search keyword (recommended word) according to the rules.

  Further, in the above-described embodiment, the search keyword for narrowing down search for the words used in the service information of a predetermined number or more out of the service information specified by the information search device 10 based on the search keyword specified by the user. When the recommended word is specified as a recommended word, it is possible to use a recommended search keyword that suggests words used in various types of service information to the user, and the service information is accurately and appropriately selected. You can expect to find out.

  In the above-described embodiment, the word recommended by the information search device 10 as a search keyword for narrowing search is a word that is used a predetermined number of times or more in the service information specified based on the search keyword specified by the user. In this configuration, it is possible to use recommended search keywords that are proposed to the user for words that are frequently used in service information, and it can be expected that service information will be searched for accurately and appropriately.

  In addition, the information search device 10 may be a device having a navigation function. In this case, although not shown, the information search apparatus 10 further includes means for storing map information, position identification information for identifying an area or service on the map, and means for storing service information in association with each other. At this time, the map information can be stored in a storage medium such as a CD-ROM or a DVD-ROM.

  As a result, the location information is identified based on the service information, the corresponding road map information is identified and extracted based on the identified location information, and the service information and the road are displayed so that the service information is displayed on the road map. The map information can be superimposed and output.

  INDUSTRIAL APPLICABILITY The present invention is industrially useful in an industry that handles devices that can search for service information requested by a user from a predetermined information group, and can display desired POI information on an electronic map by searching. It is also useful in the electrical appliance market such as navigation devices.

DESCRIPTION OF SYMBOLS 10 Information search apparatus 11 Search keyword reception part 12 Search part 13 Recommended keyword determination part 14 Control part F11 Search information storage part 20 Display part 30 Input part 40 Positioning apparatus

Claims (12)

An information search device for searching service information such as a facility corresponding to a specified search keyword from a predetermined information group to be searched,
Service information storage means for storing the service information;
Search keyword receiving means for receiving an input of a search keyword for searching for the service information;
First search means for identifying and extracting service information with reference to the service information storage means based on the search keyword received by the search keyword receiving means;
A recommended search keyword determination unit that specifies a word recommended as a search keyword for a narrow-down search from the words included in the service information specified by the first search unit, and determines the specified word as a recommended search keyword. When,
A recommended search keyword selection accepting means for accepting selection of a recommended search keyword to be used as a search keyword for the refined search from the recommended search keywords determined by the recommended search keyword determining means;
Second search means for identifying and extracting service information with reference to the service information storage means based on the search keyword accepted by the search keyword accepting means and the recommended search keyword accepted by the recommended search keyword selection accepting means When,
An information search apparatus comprising: service information output means for outputting the service information extracted by the second search means. The information search device according to claim 1, wherein the recommended search keyword determination unit specifies a word recommended as a search keyword for a refined search according to a predetermined recommended search keyword search rule. The recommended search keyword determination unit specifies a word used in a predetermined number or more of service information among the service information specified by the first search unit as a word recommended as a search keyword for a narrow search. The information retrieval device described. 3. The information search according to claim 2, wherein the recommended search keyword determination unit specifies a word that is used a predetermined number of times or more in the service information specified by the first search unit as a word recommended as a search keyword for a refinement search. apparatus. An information search method for searching service information such as a facility corresponding to a specified search keyword from a predetermined information group to be searched,
A search keyword reception process for receiving an input of a search keyword for searching for the service information;
A first search process for identifying and extracting service information with reference to service information storage means for storing the service information based on the search keyword received in the search keyword receiving process;
Determination of recommended search keyword that specifies a word recommended as a search keyword for a refined search from the words included in the service information specified in the first search process, and determines the specified word as a recommended search keyword Processing,
A recommended search keyword selection accepting process for accepting selection of a recommended search keyword to be used as a search keyword for a refined search from the recommended search keywords determined in the recommended search keyword determining process;
Based on the search keyword received in the search keyword reception process and the recommended search keyword received in the recommended search keyword selection reception process, service information is identified and extracted with reference to the service information storage means. The search process,
And a service information output process for outputting the service information extracted in the second search process. The information search method according to claim 5, wherein in the recommended search keyword determination process, a word recommended as a search keyword for a narrow search is specified according to a predetermined recommended search keyword search rule. The recommended search keyword determination process specifies words used in a predetermined number or more of service information among the service information specified in the first search process as words recommended as search keywords for a narrow search. 6. The information search method according to 6. The information according to claim 6, wherein in the recommended search keyword determination process, a word that has been used a predetermined number of times or more in the service information specified in the first search process is specified as a word recommended as a search keyword for a refined search. retrieval method. An information search program for searching service information such as a facility corresponding to a specified search keyword from a predetermined information group to be searched,
On the computer,
A search keyword reception process for receiving an input of a search keyword for searching for the service information;
A first search process for identifying and extracting service information with reference to service information storage means for storing the service information based on the search keyword received in the search keyword receiving process;
Determination of recommended search keyword that specifies a word recommended as a search keyword for a refined search from the words included in the service information specified in the first search process, and determines the specified word as a recommended search keyword Processing,
A recommended search keyword selection accepting process for accepting selection of a recommended search keyword to be used as a search keyword for a refined search from the recommended search keywords determined in the recommended search keyword determining process;
Based on the search keyword received in the search keyword reception process and the recommended search keyword received in the recommended search keyword selection reception process, service information is identified and extracted with reference to the service information storage means. The search process,
An information search program for executing a service information output process for outputting the service information extracted in the second search process. The information search program according to claim 9, wherein in the recommended search keyword determination process, the computer executes a process of specifying a word recommended as a search keyword for a refined search according to a predetermined recommended search keyword search rule. In the recommended search keyword determination process, the word used in the service information of a predetermined number or more of the service information specified in the first search process is selected as a search keyword recommended as a search keyword for the search. The information search program according to claim 10, wherein the information specifying program is executed. In the recommended search keyword determination process in the computer, a process of specifying a word that is used a predetermined number of times or more in the service information specified in the first search process as a recommended word as a search keyword for a narrowing search. The information search program according to claim 10 to be executed.

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