JP2004348243A - Information providing system and information providing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily retrieve information about a display object and an exhibition object by using a wireless IC tag. <P>SOLUTION: An information providing system comprises a wireless IC tag 102, attached to a display object or an exhibition object 10 and with an URL including provided information about the object 10 recorded thereon; information providing terminal 103 for receiving to display the information including the URL from the tag 102 when approaching the tag 102, and transmitting a connection request to the URL; and an information providing device 104 for interfacing the connection between the URL and the terminal 103, when the request from the terminal 103 is received, if the URL exists in the own information recording part 107, or exists in external information providing servers 110-1 to 110-n, respectively. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an information providing system and an information providing method for explaining an exhibit such as a work of art, a product, and a product sample, and supporting an advertising activity using a poster such as a poster or a product advertisement.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, notices such as posters and exhibits such as product samples have been media that can be easily understood by humans, and have been indispensable for product descriptions and advertising activities. Also, in art museums, museums, and the like, there is a service in which voice guidance is repeatedly reproduced when an information terminal is carried near an exhibit in order to provide information on the exhibit. In such a service based on voice guidance, the user is always passive, and is a so-called one-way broadcasting service.
[0003]
On the other hand, the information processing device and the recording device that record the information on the learning target communicate with the information terminal at the location where the learning target exists through the communication unit, so that the learning target is A method of providing information on an object has been proposed (for example, see Patent Document 1). According to this method, certain information can be obtained via a network at the request of the user, and a so-called server-client type information service can be realized.
[0004]
In addition, using a signal transmitted from the wireless terminal as a trigger, a radio tag (RFID: Radio Frequency Identification) capable of reading stored information or writing additional information is attached to a notice, and the notice is posted. An information providing method has been proposed in which information recorded in a wireless tag is automatically provided to a wireless terminal when the user approaches the wireless terminal with the wireless terminal (for example, see Patent Document 2). In this method, it is also possible to reserve a specific ticket displayed on a bulletin or the like, and to obtain contact information such as a homepage address and a telephone number. As the needs of users diversify, services that add some information to a visually obtainable information via a communication network are increasing.
[0005]
[Patent Document 1]
JP-A-8-328458 (page 3, FIG. 1)
[Patent Document 2]
JP-A-2002-268593 (page 3, FIG. 1)
[0006]
[Problems to be solved by the invention]
As IT (Information Technology) develops, it is necessary to connect to high-value networks, such as the Internet, to search for information to obtain more information, and to easily buy and sell products by electronic trading. Needs are growing. It is clear that similar needs arise not only for advertisements on the Internet but also for notices and exhibits in real space.
[0007]
The wireless tag, which operates without a power supply and can be attached without being affected by the shape of the object, is an extremely convenient information providing device. However, if information that changes every day, such as a product price, is recorded in the wireless tag one by one, it takes time and effort for management and operation. When searching for information on an object on the Internet or the like, it is necessary to input a keyword. However, when a mobile terminal such as a PDA (mobile information terminal) or a mobile phone is used, a touch panel is basically used. You must type using a software keyboard or buttons. In addition, when purchasing an object or a ticket, a personal authentication function required for credit card settlement or the like is required, but there are few methods that can be managed in conjunction with the provided information.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for providing information using a wireless tag to a user and an information provider by adding a function of allowing a user to easily search for related information and securely performing personal authentication. It is an object of the present invention to provide an information providing system and an information providing method capable of mutually exchanging information safely and easily obtaining information required by a user.
[0009]
[Means for Solving the Problems]
In order to achieve the object, an information providing system according to the first aspect of the present invention includes a wireless tag which is attached to a notice or an exhibit and records a URL on which information on the notice or the exhibit is provided, When approaching the wireless tag, information including a URL is received and displayed from the wireless tag, and an information providing terminal that transmits a connection request with the URL, and when a connection request is received from the information providing terminal, the URL is An information providing device that mediates a connection to a URL to the information providing terminal when the information providing terminal is in its own information recording unit or in an external information providing server.
[0010]
Thus, only by recording a URL having a small information amount in the wireless tag, information required by the user can be provided from the information providing server to the information providing terminal via the network, not only from the information providing apparatus. .
[0011]
The information providing system according to the second aspect of the present invention is a wireless tag that is attached to a notice or an exhibit and records a keyword related to the notice or the exhibit. An information providing terminal that receives and displays information including a keyword from a user, and transmits a search request for the keyword specified by the user. When a search request is received from the information providing terminal, data corresponding to the keyword includes its own information. If it is in the recording unit, it is provided, or a search is made to an external information providing server, a URL list of the search result is returned to the information providing terminal, and a connection request is made from the user by specifying the URL. An information providing device for providing the URL providing information to the information providing terminal.
[0012]
This makes it possible to simplify the search by transferring a keyword for searching for related information using a search engine from an information providing terminal that can be connected to the Internet, and to provide useful information on the Internet other than the information provided by the information provider. The information can be used for the convenience of the user.
[0013]
The information providing system according to the third aspect of the present invention is provided with a wireless tag attached to a notice or an exhibit and recording electronic commerce data on the notice or the exhibit, and when approaching the wireless tag, An information providing terminal that receives e-commerce data from the wireless tag, starts an e-commerce application, displays a purchase setting screen, and encrypts and transmits an e-commerce approval request with an encryption key; An information providing device for decrypting an approval request from a terminal with an encryption key and encrypting a digital certificate and transmitting the encrypted electronic certificate to the information providing terminal when the encryption key matches the personal information registered at the time of lending the information providing terminal; The contents of the electronic commerce and the electronic certificate transmitted from the information providing terminal that received the certificate and encrypted with the encryption key are received and confirmed from the information providing device and confirmed. An electronic commerce system to reply to the information providing terminal results of the electronic commerce via the information providing apparatus, characterized by comprising a.
[0014]
As a result, the information providing device acts as a personal certificate authority and issues an electronic certificate to the user, which can be used to securely carry out electronic commerce of notices and exhibits (including commodities) with wireless tags attached. I can do it.
[0015]
An information providing system according to a fourth aspect of the present invention is characterized in that the information recorded on the wireless tag is compressed or encrypted into information recognizable by the information terminal device.
[0016]
As a result, the amount of information stored in the wireless tag can be increased, and the communication capacity load can be reduced while ensuring the confidentiality of the information transmitted by the wireless medium.
[0017]
Further, the information providing method according to the invention of claim 5 includes, when approaching a wireless tag attached to a notice or an exhibit, a URL in which provided information regarding the notice or the exhibit is posted from the wireless tag. The information providing terminal receiving and displaying the information, and transmitting a connection request with the URL; and receiving the connection request from the information providing terminal, when the URL is in its own information recording unit or when providing external information. And a step in which the information providing apparatus mediates a connection to the URL to the information providing terminal when the information is provided in the server.
[0018]
Thus, necessary information can be easily searched for using the URL of the wireless tag.
[0019]
Further, in the information providing method according to the invention of claim 6, the information providing terminal receives information including a keyword relating to the notice or the exhibit from the wireless tag when approaching the wireless tag attached to the notice or the exhibit. Transmitting the search request for the keyword specified by the user, and, when receiving the search request from the information providing terminal, providing the data corresponding to the keyword if it is present in its own information recording unit. Or the information providing apparatus performs a search on an external information providing server, returns a URL list of the search result to the information providing terminal, specifies the URL from the user, and sends the URL to the information providing terminal that has requested connection. Providing corresponding information.
[0020]
This makes it possible to easily and quickly search for information related to the keyword using the search engine.
[0021]
The information providing method according to the invention of claim 7 is characterized in that, when approaching a wireless tag attached to a notice or an exhibit, the information providing terminal transmits electronic commerce data relating to the notice or the exhibit from the wireless tag. Receiving, activating the e-commerce application, displaying the purchase setting screen, encrypting the e-commerce approval request with an encryption key and transmitting the request, and the information providing device encrypting the approval request from the information providing terminal. Decrypting with the key, encrypting the electronic certificate and transmitting it to the information providing terminal when the encryption key matches the personal information registered at the time of lending the information providing terminal, and transmitting the electronic certificate to the information providing terminal. The e-commerce system receives and confirms the contents of the e-commerce and the electronic certificate transmitted and encrypted with the encryption key from the information providing device, and confirms the confirmed e-commerce. It results a step of returning a via the information providing device to the information providing terminal, characterized in that it comprises a.
[0022]
As a result, electronic commerce using the Internet or the like can be performed safely by personal authentication, and merchandise trading can be realized interactively in conjunction with the provided information stored in the wireless tag.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0024]
(Embodiment 1)
FIG. 1 is a system configuration diagram showing an information providing system according to a first embodiment of the present invention. Reference numeral 101 denotes a poster such as a poster or a product advertisement, or an exhibit such as a fine art, a product, or a product sample. Is a wireless tag (RFID), and 103 is an information providing terminal used by the user. Reference numeral 104 denotes an information providing device, a terminal connection unit 105 that controls communication with the information providing terminal 103, an information processing unit 106 that performs main data processing, an information recording unit 107 that records personal information and provided information, An external network connection unit 108 controls communication with an external network. Reference numeral 109 denotes a network such as the Internet, and reference numerals 110-1 to 110-n denote information providing servers such as WWW servers connected to the network 109.
[0025]
Next, the operation of this information providing system will be described according to the flow of FIG.
[0026]
In the first embodiment of the present invention, when the user carries the information providing terminal 103 and approaches the notice / exhibition 101 and goes to an area where the wireless tag 102 can respond, the information providing terminal 103 A signal of a predetermined format is transmitted to the wireless tag 102 (1). Upon receiving the signal transmitted from the information providing terminal 103, the wireless tag 102 stores the electromagnetic energy in the capacitor, and uses the energy to store the ID recorded inside itself and the URL containing the provided information. The included information is transmitted to the information providing terminal 103 (2).
[0027]
FIG. 3 is a diagram illustrating a minimum configuration of an information format of data returned from the wireless tag 102 to the information providing terminal 103. The reply data is composed of a wireless tag ID, one or more URLs for providing information, and a command for displaying the URL or for starting an application that starts the browser by specifying the URL. With such a simple configuration, it is sufficient that the storage capacity of the wireless tag 102 is several tens of kilobytes, and a plurality of URLs can be transmitted as a list. Further, by compressing or encrypting the information about the URL into information that can be recognized by the information providing terminal 103, the amount of data stored in the wireless tag 102 and the amount of data to be transmitted can be reduced. Confidentiality can also be improved.
[0028]
The information providing terminal 103 that has received the reply data (FIG. 3) from the wireless tag first activates an application for displaying the provided information, such as a browser (3). Next, a list of returned URLs is displayed (4). The URL list includes URLs of information stored in the information recording unit 107 of the information providing apparatus 104 and information related to the presentation or exhibit 101 among the information providing servers 110-1 to 110-n. The URL is displayed. Here, when there are a plurality of URLs, the user is prompted to make a selection and made to select it. If the user's selection is completed or the specified URL is one, an information provision request is transmitted to the information processing device 104 (5). At this time, communication between the information providing terminal 103 and the information providing apparatus 104 is performed by controlling the terminal connecting unit 105 by the information processing unit 106.
[0029]
When the specified URL is in the information recording unit 107 of the information providing apparatus 104, the information processing unit 106 controls the information recording unit 107 and the terminal connection unit 105 to respond to the request of the information providing terminal 103 ( 6). When the specified URL is located in the information providing servers 110-1 to 110-n on the external network, the information providing apparatus 104 functions as a proxy server, and the information providing servers 110-1 to 110-n Connection, data caching, and filtering (7). The information providing device 104 responds to the request of the information providing terminal 103 by mediating with the external information providing servers 110-1 to 110-n (8). At this time, connection with the information providing servers 110-1 to 110-n is performed by controlling the external network connection unit 108 by the information processing unit 106.
[0030]
The wireless tag 102 records information that can be converted into a URL, in addition to a URL on which information relating to the exhibit or the notice 101 is posted, and a signal from the information providing terminal 103 triggers the information providing terminal 103 to display the information. Information including information that can be converted to a URL may be returned. In this case, the information providing terminal 103 converts the information that can be converted into the URL into a URL that can be recognized by the information display application, specifies this URL, and makes a connection request to the information providing apparatus.
[0031]
As described above, in the first embodiment, the URL is recorded on the wireless tag, and the provided information itself can be managed by the information providing device 104. The information can be obtained using the information. Further, the information provider can easily manage and operate the WWW server so that the provided information can be updated on the WWW server when a plurality of notices and exhibits are present. In addition, since abundant resources such as the Internet can be effectively used, user satisfaction can be improved. Further, by setting links to other URLs, which are a huge number of information sources, it is possible to provide the latest information without updating the provided information by itself.
[0032]
(Embodiment 2)
Next, a second embodiment of the present invention will be described. In the second embodiment, a keyword related to a notice or an exhibit is registered in a wireless tag in advance, so that the information providing terminal automatically searches for information related to the keyword.
[0033]
FIG. 4 is a diagram showing a configuration of transmission data transmitted from the wireless tag to the information providing terminal in the second embodiment. As shown in FIG. 4, the minimum configuration of the transmission data is a wireless tag ID, a command for starting an information search application, and screen data for providing information including a keyword list.
[0034]
Next, an operation procedure of the second embodiment will be described with reference to FIG. FIG. 5 shows an image of an exhibit at a certain museum. 501 is an exhibit such as a calligraphy, 502 is a wireless tag attached to the exhibit 501, and 503 is an information providing terminal. It is assumed that this information providing terminal is connected to an external network 109 via an information providing device 104 similar to that shown in FIG. The control flow is as shown in FIG.
[0035]
When the user carries the information providing terminal 503 and approaches the exhibit 501 and goes to an area where the wireless tag 502 can respond, the information providing terminal 503 transmits a signal of a predetermined format to the wireless tag 502. (1). On the other hand, when receiving the signal transmitted from the information providing terminal 503, the wireless tag 502 stores the electromagnetic energy in the capacitor, and uses the energy to return the return data of FIG. The information is transmitted to the providing terminal 503 (2).
[0036]
Upon receiving the reply data, the information providing terminal 503 activates an information providing application and displays, for example, a chronological information providing screen as shown in FIG. 7 (3). When there are a plurality of search keywords, the user is made to select (4). Here, the characters represented by (bold + underline) correspond to the keywords. When the user selects a keyword, a search request for the selected keyword is transmitted to the information providing device 104 (5).
[0037]
If the display data corresponding to the specified keyword is in the information recording unit 107, the information providing device 104 responds to the request (6). On the other hand, when performing a search on the external network using the specified keyword, the information providing apparatus 104 functions as a proxy server and performs an information search using a search engine (7). Next, the information providing apparatus 104 returns a search result to the information providing terminal 503 (8). The reply result is a URL list, and the user specifies a desired URL from the search result and makes a connection request to the information providing apparatus 104 (9). The information providing apparatus 104 connects to the designated URL (10), and the information providing terminal 103 displays the provided information (11).
[0038]
Here, by compressing or encrypting the related keyword into information recognizable by the information providing terminal 503, the amount of data recorded by the wireless tag 502 and the amount of data to be transmitted can be reduced. The confidentiality of information can be improved.
[0039]
As described above, in the second embodiment of the present invention, the keyword related to the object is provided from the wireless tag 502 to the information providing terminal 503. By linking the search engine with the keyword transmitted to the information providing terminal 503, it is possible to improve user satisfaction by using useful information on the Internet in addition to information prepared by the information provider. It is possible. Also, a database can be constructed in the LAN to which the information providing terminal 503 belongs, and information can be provided using information registered in the database. In this case, since only the URL of the home page in the LAN is designated, the operation and management and operation of the user become easy.
[0040]
(Embodiment 3)
Embodiment 3 of the present invention will be described. In the third embodiment, the same information providing apparatus as in FIG. 1 acts as a personal certificate authority and issues a user's digital certificate, and uses the digital certificate to perform electronic commerce of a product to which a wireless tag is attached. I do.
[0041]
FIG. 8 is a system configuration diagram showing the third embodiment of the present invention. Reference numeral 801 denotes an exhibit, in this case, a product itself for performing electronic commerce, which may be an advertisement poster or a product sample. Reference numeral 802 denotes a wireless tag, reference numeral 803 denotes an information providing terminal, reference numeral 804 denotes an information providing device, and reference numeral 805 denotes a network. Reference numerals 806-1 to 806 -n denote electronic commerce systems of merchandise advertisement providers that conduct electronic commerce.
[0042]
Next, the operation procedure of the third embodiment will be described with reference to the control flow shown in FIG.
[0043]
When the user carries the information providing terminal 803 and approaches the product 801 and goes to an area where the wireless tag 802 can respond, the information providing terminal 803 transmits a signal of a predetermined format to the wireless tag 802. (1). Upon receiving the signal transmitted from the information providing terminal 803, the wireless tag 802 stores the electromagnetic energy in the capacitor, and uses the energy to transmit the electronic commerce data recorded therein to the information providing terminal 803. Send (2).
[0044]
When the information providing terminal 803 receives the e-commerce data, it activates the e-commerce application and displays the purchase setting screen (3). Next, the information providing terminal 803 encrypts and transmits an approval request for performing electronic commerce to the information providing device 804 with the encryption key unique to the information providing terminal 803 according to the user's input (4).
[0045]
The information providing apparatus 804 decrypts the information using the terminal-specific encryption key registered when the information providing terminal 803 is activated, and determines that the encryption key matches the personal information registered when the information providing terminal 803 is lent. For example, it issues an electronic certificate, encrypts it, and sends it to the information providing terminal 803 (5). In order to prevent theft, when lending the information providing terminal 803 to a user, the information providing terminal 803 is lent in exchange for a personal identification card such as a credit card or a personal ID card. You can register. Therefore, by linking with a credit card number or the like, electronic commerce by registered card settlement becomes possible.
[0046]
On the other hand, the information providing terminal 803 receives the electronic certificate from the information providing device 804, and after the personal authentication is completed, prompts the user to input the number of purchases, the payment method, and the like, and transmits the contents of the electronic commerce and the certificate. The data is encrypted with the terminal-specific encryption key and transmitted to the information providing device 804 (6). On the other hand, the information providing apparatus 804 confirms the content and certificate of the electronic commerce, encrypts the information with the encryption key unique to the information providing apparatus 804, and transmits the encrypted information to the electronic commerce systems 806-1 to 806-n (7). The electronic commerce systems 806-1 to 806 -n of each advertisement provider and merchandise sales company confirm the received content and reply the transaction result to the information providing device 804 (8). The information providing device 804 confirms the contents of the response from the electronic commerce system 806-1 to 806-n, and returns the transaction result to the information providing terminal 803 (9).
[0047]
As described above, according to the third embodiment of the present invention, the information providing device 804 acts as a personal certificate authority and issues a user's digital certificate, and the wireless tag 802 is attached using the certificate. Electronic commerce such as the purchased product can be performed safely. By setting the validity period of the electronic certificate issued to the information providing terminal 803 and setting it so that it can be used during that period, frequent personal authentication exchanges can be reduced. In addition, it is possible to perform electronic commerce for a plurality of products with the same certificate by using an electronic certificate that is valid for a certain period, thereby performing secure and efficient data communication.
[0048]
【The invention's effect】
As described above, according to the present invention, by recording a URL having a small amount of information in the wireless tag, information can be provided according to the needs of the user. In addition, by recording a keyword having strong relevance in the wireless tag and searching for information in another information providing server in conjunction with a search engine, more information can be provided to the user. Furthermore, when electronic commerce is performed via a network such as the Internet, there is an effect that electronic commerce can be securely performed with a plurality of information providing servers simply by giving one electronic certificate to one information providing terminal.
[Brief description of the drawings]
1 is a system configuration diagram showing an information providing system according to a first embodiment of the present invention; FIG. 2 is a flowchart showing an operation procedure of the information providing system in FIG. 1; FIG. 3 is a data structure of a wireless tag in FIG. FIG. 4 is a data structure diagram showing a data structure of a wireless tag in the information providing system according to the second embodiment of the present invention. FIG. 5 is a diagram showing an information providing system according to the second embodiment of the present invention. FIG. 6 is a flowchart showing an operation procedure of the information providing system in FIG. 5; FIG. 7 is a screen diagram showing an information providing screen in the information providing terminal according to the second embodiment of the present invention; FIG. 9 is a system configuration diagram showing an information providing system according to a third embodiment of the present invention. FIG. 9 is a flowchart showing an operation procedure of the information providing system in FIG.
101, 501, 801: notice, exhibit, 102, 502, 802: wireless tag, 103, 503, 803: information providing terminal, 104, 804: information providing terminal, 105: terminal connection unit, 106: information processing unit , 107: information recording unit, 108: external network connection unit, 109, 805: network, 110-1 to 110-n: information providing server, 806-1 to 806-n: electronic commerce system.

Claims (7)

A wireless tag which is attached to a notice or an exhibit and records a URL or information which can be converted into a URL which has posted information on the notice or the exhibit,
An information providing terminal that receives and displays a URL or information including information that can be converted to a URL from the wireless tag when the wireless tag approaches the wireless tag, and transmits a connection request with the URL;
When a connection request is received from the information providing terminal, when the URL is in its own information recording unit or in an external information providing server, an information providing device that mediates the connection to the URL to the information providing terminal,
An information providing system comprising: A wireless tag attached to a notice or exhibit and recording keywords relating to such notice or exhibit;
An information providing terminal that receives and displays information including a keyword from the wireless tag when approaching the wireless tag, and transmits a search request for the keyword specified by the user;
When a search request is received from the information providing terminal, if the data corresponding to the keyword is present in its own information recording unit, this is provided, or a search is performed with respect to an external information providing server, and a URL list of the search result is obtained. An information providing device that returns information to the information providing terminal and provides the URL-compatible information to the information providing terminal that has requested connection by designating a URL from the user;
An information providing system comprising: A wireless tag attached to a notice or exhibit and recording e-commerce data related to the notice or exhibit;
When approaching the wireless tag, receive e-commerce data from this wireless tag, start the e-commerce application, display the purchase setting screen, and encrypt the e-commerce approval request with an encryption key and send it Information providing terminal,
An information providing device for decrypting an approval request from the information providing terminal with an encryption key and encrypting the electronic certificate and transmitting it to the information providing terminal when the encryption key matches the personal information registered at the time of lending the information providing terminal; ,
The contents of the electronic commerce and the electronic certificate transmitted from the information providing terminal that has received the electronic certificate and encrypted with the encryption key are received and confirmed from the information providing device, and the result of the confirmed electronic commerce is transmitted to the information providing device. An e-commerce system that replies to the information providing terminal via
An information providing system comprising: 4. The information providing system according to claim 1, wherein the information recorded on the wireless tag is compressed or encrypted into information recognizable by an information terminal device. When approaching a wireless tag attached to a notice or an exhibit, the information providing terminal receives and displays information including a URL in which provided information on the notice or the exhibit is posted from the wireless tag, and displays the URL. Sending a connection request with
When receiving a connection request from the information providing terminal, when the URL is in its own information recording unit or in an external information providing server, the information providing device mediates a connection to the URL to the information providing terminal,
An information providing method comprising: When approaching a wireless tag attached to a notice or an exhibit, the information providing terminal receives and displays information including a keyword related to the notice or the exhibit from the wireless tag, and displays the information corresponding to the keyword specified by the user. Sending a search request;
When a search request is received from the information providing terminal, if the data corresponding to the keyword is present in its own information recording unit, the information is provided, or the information providing apparatus performs a search on an external information providing server, and the search result is obtained. Returning the URL list of the URL to the information providing terminal, providing the URL corresponding information to the information providing terminal that has requested connection by designating the URL from the user,
An information providing method comprising: When approaching a wireless tag attached to a notice or exhibit, the information providing terminal receives e-commerce data relating to the notice or exhibit from the wireless tag, activates an e-commerce application, and sets purchase settings. Displaying a screen and encrypting and transmitting an e-commerce approval request with an encryption key;
The information providing device decrypts the approval request from the information providing terminal with the encryption key, and when the encryption key matches the personal information registered at the time of lending the information providing terminal, encrypts the electronic certificate and sends it to the information providing terminal. Steps and
The e-commerce system receives and confirms the contents of the e-commerce and the e-certificate transmitted from the information providing terminal that has received the electronic certificate and encrypted with the encryption key from the information providing device, and displays the confirmed e-commerce result. Replying to the information providing terminal via the information providing device;
An information providing method comprising:

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