# Patent

## Title
Information distribution system, service-providing method for an information distribution system, and a program for the same

## Abstract

An integrated device control service acquires output data, information related to the address of a first receiver and a first style sheet for the first receiver, and information related to the address of a second receiver and a second style sheet for the second receiver from an application and a style sheet database that stores a plurality of style sheets describing information conversion rules. In accordance with the success or failure of first conversion data distribution, the integrated device control service sends second conversion data, which is the output data converted according to the second style sheet, to the second receiver.

## Background
This application is a continuation of U.S. patent application Ser. No. 12/582,303, now U.S. Pat. No. 8,504,647, filed on Oct. 20, 2009, entitled “Information Distribution System, Service-Providing Method For An Information Distribution System, And A Program For The Same,” which is hereby incorporated by reference in its entirety.


BACKGROUND
1. Technical Field
The present invention relates to an information distribution system for distributing information between transmitters and receivers, to a service-providing method for an information distribution system, and to a program for the same.
2. Related Art
When information is distributed to plural types of devices (receivers) such as printers, displays, and card readers that are connected to a computer, an application program (a transmitter, referred to below as simply “application”) is installed on the computer and commands are output from the application. In order to cause the plural types of devices to execute a single coordinated process, the application must be written to include processes specific to each device, such as a process instructing a first device to execute an operation and return event information, and another process then instructing a second device to execute an operation and return event information, and writing the application is thus time-consuming.
Japanese Unexamined Patent Appl. Pub. JP-A-2000-242594 therefore teaches a system that inserts a management module between the application and the plural devices. The application sends a device name and process content (process identifier) to the management module, and the management module writes the received content to a table and causes the devices to execute a coordinated process. Because this configuration eliminates the need to write the process content for executing the coordinated process in the application, writing the application is easier. Another advantage is that application changes can be kept to a minimum when the number of devices changes.
When it is necessary to change the format, layout, or print content to be printed by the printer with the system taught in JP-A-2000-242594, however, the application must be changed. When a device is replaced with a different model, the control information (commands) that must be sent also changes and the application must therefore also be changed. The system taught in JP-A-2000-242594 is thus not configured so that changes in process content or differences in device models can be absorbed by the management module.
When information is sent to the first device (when the first device is instructed to execute an operation) and the information is distributed normally, it is conceivable with the foregoing system to then send different information to the second device so that processes are executed sequentially (consecutively), but this requires the application side to execute another process to determine if the information was distributed normally. This means that processes for each device must still be written into the application. The desired effect therefore cannot be achieved by the foregoing system when coordinated processes are executed.
SUMMARY
There has therefore been a need for an information distribution system that can reduce the effort required to change an application in conjunction with changes in process content and changes in the receiver model or specifications, and can execute coordinated processes by a plurality of receivers without involving an intervening application, a service-providing method for such an information distribution system, and a program for the same.
An information distribution system, a service-providing method for such an information distribution system, and a program for the same solve the foregoing problem as described below.
An information distribution system according to a first aspect of the invention has a storage unit that stores a style sheet describing information conversion rules; an output data acquisition unit that acquires output data from a transmitter; first receiver information that corresponds to a first receiver, which is one receiver, and includes first information specifying the address of the first receiver and a first style sheet defining information conversion rules for the first receiver, and second information specifying second receiver information corresponding to a second receiver to which information is distributed after distribution to the first receiver; a distribution information acquisition unit that acquires distribution information containing the first receiver information and the second receiver information; a distribution unit that distributes conversion data resulting from converting the output data according to the style sheet specified by the first receiver information or the second receiver information to the first receiver or the second receiver; and a distribution decision unit that determines if distribution of the conversion data by the distribution unit was successful. The distribution unit distributes the output data to the second receiver based on the second receiver information in accordance with the result of the distribution success decision of the distribution decision unit, which decides if distribution of first conversion data converted according to the first style sheet to the first receiver was successful.
By converting output data from the transmitter to conversion data (first conversion data or second conversion data), this aspect of the invention can accommodate changes in process content and replacement of a receiver (such as when a device is replaced with a device of different type or specifications) by rewriting a style sheet. More specifically, because changes in process content and differences in device types and specifications can be absorbed by style sheets, writing the transmitter application is easy and the effort associated with changing process content or receiver replacement can be reduced.
Plural distribution information objects can preferably be acquired. This enables processing the next distribution information object while processing continues based on one distribution information object, and thus enables an efficient information distribution system.
Further preferably, when plural distribution information objects are acquired, information specifying the distribution information to be used for information conversion should be added to the output data.
Further preferably, the distribution information can be acquired from the transmitter of the output data. In this situation the distribution information and the output data can be acquired simultaneously. This enables identifying the distribution information corresponding to the output data from among the plural distribution information objects.
In this situation the distribution information and output data may be acquired at different times. Because this enables reusing previously used distribution information, transmitting plural distribution information objects every time is not necessary and the amount of data distributed can be reduced. The transmission time can therefore also be reduced.
The distribution information can also be transmitted before the output data is distributed. As a result, when the same distribution information can be used, there is no need to distribute the same distribution information every time and the amount of distribution data can be reduced. As a result, the transmission time can also be reduced.
In an information distribution system according to a second aspect of the invention, the second receiver is a linked receiver to the first receiver to which the distribution unit transmits second conversion data at least when the distribution decision unit determines distribution of the first conversion data was successful; the distribution information includes linked receiver information which is receiver information specifying at least the address of the linked receiver and a linked style sheet defining information conversion rules for the linked receiver; and the second conversion data is linked conversion data obtained by converting the output data according to the linked style sheet defined in the linked receiver information.
In this aspect of the invention the second receiver effectively has the function of the first receiver because the information distribution system distributes information based on linked receiver information for a linked receiver that is designated as a second receiver when information distribution based on the first receiver information is completed normally, and the application can sequentially cause a plurality of receivers to operate one after another as a result of outputting the output data only once. More specifically, a coordinated process executed using a plurality of receivers can be achieved without going through the application.
In an information distribution system according to a third aspect of the invention, the second receiver is a substitute receiver for the first receiver to which the distribution unit transmits second conversion data at least when the distribution decision unit determines distribution of the first conversion data was not successful; the distribution information includes substitute receiver information which is receiver information specifying at least the address of the substitute receiver and a substitute style sheet defining information conversion rules for the substitute receiver; and the second conversion data is substitute conversion data obtained by converting the output data according to the substitute style sheet defined in the substitute receiver information.
When distribution of the first converted data is not successful, this aspect of the invention distributes to a substitute receiver instead of the first receiver second conversion data that is converted according to a second style sheet corresponding to the substitute receiver, and can therefore distribute the output data to the substitute receiver instead of the first receiver without involving the application even when the type or specifications of the first receiver and substitute receiver differ.
In an information distribution system according to a fourth aspect of the invention, the distribution information includes either or both of one or more linked receiver information objects having a priority setting and one or more substitute receiver information objects having a priority setting following the first receiver information, linked receiver information, and substitute receiver information; the distribution unit further distributes information based on linked receiver information with a lower priority when the distribution decision unit determines that distribution based on the linked receiver information or the substitute receiver information was successful; and the distribution unit further distributes information based on substitute receiver information with a lower priority when the distribution decision unit determines that distribution based on the linked receiver information or the substitute receiver information was not successful.
This aspect of the invention can reliably distribute output data to a linked receiver because a substitute receiver can receive the distributed information. More specifically, a linked process can be executed using numerous receivers by rendering plural information objects in a hierarchy in the linked receiver information. In addition, non-distribution of information can be reliably eliminated by rendering plural information objects in a hierarchy in the substitute receiver information.
In an information distribution system according to a fifth aspect of the invention, the receiver information specifies a time limit used as a distribution error decision standard, and the distribution decision unit determines that distribution was not successful if distribution is not completed to the first receiver or to the second receiver, including the linked receiver and the substitute receiver, when the time limit is reached.
This aspect of the invention enables the transmitter to specify separately for each receiver and output data object a time limit used as a standard for determining distribution errors.
In an information distribution system according to a sixth aspect of the invention, the first receiver information, and the second receiver information including the linked receiver information or the substitute receiver information, include an input style sheet defining information conversion rules according to the transmitter; and the information distribution system further comprises a response unit that inputs input conversion data acquired by converting input data from the receiver according to the input style sheet to the transmitter.
In an information distribution system according to a seventh aspect of the invention, the output data acquisition unit can acquire output data from a plurality of transmitters; and the storage unit stores a plurality of different input style sheets corresponding to the plural transmitters.
With this aspect of the invention the transmitter can acquire input data input from a receiver. Furthermore, because the information distribution system can specify an input style sheet for each transmitter when linked to a plurality of transmitters, input conversion data can be input according to each transmitter.
In an information distribution system according to an eighth aspect of the invention, the transmitter is equivalent to an application; the receiver is equivalent to a device or, when a single device is composed of a plurality of logic structures, to any of said logic structures; and the output data, first conversion data, second conversion data, input data, and input conversion data are all markup documents.
This aspect of the invention enables applying the invention to an information distribution system that distributes information acquired from applications to devices.
The invention can also be applied to an information distribution system in which the receivers are logic structures (such as the printer, scanner, and buzzer in a multifunction printer) contained in a device instead of the device.
XML (eXtensible Markup Language) is one example of a description language used in markup documents, and using XML has several advantages, including ease of design because markup document content can describe functions, design is not dependent on a particular language or culture, and ambiguities in document structure can be eliminated.
In an information distribution system according to a ninth aspect of the invention, the storage unit stores a plurality of style sheets for converting the output data to the first conversion data or the second conversion data in different description languages; and the receiver includes plural types of devices or plural types of logic structures that can interpret different description languages.
This aspect of the invention enables a single information distribution system to handle plural types of devices or plural types of logic structures that can interpret different description languages. This enables, for example, causing a display to process a printer process (such as displaying on screen information that was to be provided by a paper printout) by simply rewriting the style sheet without needing to change the application. Devices can thus be flexibly replaced as needed according to the operating environment.
In an information distribution system according to a tenth aspect of the invention, a plurality of receiver information objects with the same priority setting are included in the distribution information.
This aspect of the invention enables transmitting (broadcasting) simultaneously to receivers with the same priority level, and can thus improve the reliability of distribution.
Another aspect of the invention is a service-providing method for an information distribution system that has an output data acquisition unit, a distribution information acquisition unit, a distribution unit, and a distribution decision unit, and manages a database storing a plurality of style sheets defining information conversion rules and distributes at least information acquired from a transmitter to a receiver, the service-providing method including first receiver information that corresponds to a first receiver, which is one receiver, and includes first information specifying the address of the first receiver and a first style sheet defining information conversion rules for the first receiver, and second information specifying second receiver information corresponding to a second receiver to which information is distributed after distribution to the first receiver; a step of acquiring output data from the transmitter by the output data acquisition unit; a step of acquiring distribution information containing the first receiver information and the second receiver information by the distribution information acquisition unit; a step of distributing by the distribution unit conversion data resulting from converting the output data according to the style sheet specified by the first receiver information or the second receiver information to the first receiver or the second receiver; a step of determining by the distribution decision unit if the conversion data was distributed by the distribution unit successfully; and a step of distributing by the distribution unit second conversion data resulting from converting the output data according to a second style sheet based on the second receiver information to the second receiver in accordance with the result of the distribution decision step deciding if distribution of first conversion data converted according to the first style sheet to the first receiver was successful.
By converting output data from the transmitter to conversion data (first conversion data or second conversion data), this aspect of the invention can accommodate changes in process content and replacement of a receiver (such as when a device is replaced with a device of different type or specifications) by rewriting a style sheet. More specifically, because changes in process content and differences in device types and specifications can be absorbed by style sheets, writing the transmitter application is easy and the effort associated with changing process content or receiver replacement can be reduced.
In a service-providing method according to another aspect of the invention, the second receiver is a linked receiver to the first receiver to which the distribution step transmits second conversion data at least when the distribution decision step determines distribution of the first conversion data was successful; the distribution information includes linked receiver information which is receiver information specifying at least the address of the linked receiver and a linked style sheet defining information conversion rules for the linked receiver; and the second conversion data is linked conversion data obtained by converting the output data according to the linked style sheet defined in the linked receiver information.
In this aspect of the invention the second receiver effectively has the function of the first receiver because the information distribution system distributes information based on linked receiver information for a linked receiver that is designated as a second receiver when information distribution based on the first receiver information is completed normally, and the application can sequentially cause a plurality of receivers to operate one after another as a result of outputting the output data only once. More specifically, a coordinated process executed using a plurality of receivers can be achieved without going through the application.
In a service-providing method according to another aspect of the invention, the second receiver is a substitute receiver for the first receiver to which the distribution step transmits second conversion data at least when the distribution decision step determines distribution of the first conversion data was not successful; the distribution information includes substitute receiver information which is receiver information specifying at least the address of the substitute receiver and a substitute style sheet defining information conversion rules for the substitute receiver; and the second conversion data is substitute conversion data obtained by converting the output data according to the substitute style sheet defined in the substitute receiver information.
When distribution of the first converted data is not successful, this aspect of the invention distributes to a substitute receiver instead of the first receiver second conversion data that is converted according to a second style sheet corresponding to the substitute receiver, and can therefore distribute the output data to the substitute receiver instead of the first receiver without involving the application even when the type or specifications of the first receiver and substitute receiver differ.
Another aspect of the invention is a program that causes a computer to execute the steps of the service-providing method for an information distribution system described herein.
This aspect of the invention can reduce the amount of work required to change the application in conjunction with changes in process content or changes in receiver type or specifications, and enables providing an information distribution system service that can execute a coordinated process using a plurality of receivers without going through an application.
Other objects and attainments together with a fuller understanding of the invention will become apparent and appreciated by referring to the following description and claims taken in conjunction with the accompanying drawings.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a system configuration diagram of an in-house management system.
FIG. 2 is a function block diagram of a server.
FIG. 3A is a domain model showing distribution information.
FIG. 3B is a domain model showing distribution results.
FIG. 3C is a domain model showing distribution information and distribution results.
FIG. 4 is a flow chart of the information distribution process of the in-house management system.
FIG. 5 is a flow chart of the response process of the in-house management system.
FIG. 6 shows an example of XML document 1 (output data).
FIG. 7 shows an example of XML document 1 (distribution information).
FIG. 8A shows an example of an output style sheet (drink department).
FIG. 8B shows an example of an XML document 2 based on the output style sheet of FIG. 8A.
FIG. 9A shows an example of an output style sheet (grill department).
FIG. 9B shows an example of an XML document 2 based on the output style sheet of FIG. 9B.
FIG. 10A shows an example of an output style sheet (salad department).
FIG. 10B shows an example of an XML document 2 based on the output style sheet of FIG. 10A.
FIG. 11 shows an example of XML document 4 (distribution result).
FIG. 12 is a flow chart of a server substitution process.
FIG. 13A shows an example of a substitute output style sheet.
FIG. 13B shows an example of an XML document 2 based on the output style sheet of FIG. 13A.
FIG. 14A shows an example an output style sheet.
FIG. 14B shows an example an XML document 2 based on the output style sheet of FIG. 14A.
FIG. 15A shows an example of a substitute output style sheet.
FIG. 15B shows an example of an XML document 2 based on the output style sheet of FIG. 15A.
FIG. 16A is a block diagram of the domain model showing the distribution information when a sequential process including a coordinated process is executed.
FIG. 16B shows the process flow of the domain model of FIG. 16A.
FIG. 17 is a flow chart of a sequential process including a coordinated process.
FIG. 18 shows an example of XML document 1 (distribution information) when executing a sequential process including a coordinated process.
FIG. 19 shows an example of XML document 4 (distribution result) when executing a sequential process including a coordinated process.



DESCRIPTION OF EMBODIMENTS
A preferred embodiment of the present invention is described below with reference to the accompanying figures.
An information distribution system, a service-providing method for an information distribution system, and a program for the same according to preferred embodiments of the invention are described below with reference to the accompanying figures. The invention centrally converts information acquired from a transmitter (application) to information appropriate to each individual receiver (device) and distributes the converted information to the appropriate devices to centrally control each receiver. The information distribution system of the invention is described below using by way of example an in-house management system deployed in a restaurant or other food service business. Note that this in-house management system is a system that controls different types of devices such as kitchen printers and cooking equipment based on customer order information acquired from an order terminal.
FIG. 1 is a block diagram of an in-house management system SY according to this embodiment of the invention. The in-house management system SY includes an order terminal 10 for inputting customer orders, a computer 20 (referred to as a “PC” below) that functions as an order terminal, a server 30 (information distribution system) incorporating an integrated device control service 44, and devices 50 such as a kitchen printer 61 and cooking equipment 62. The PC 20, server 30, and devices 50 are connected together through a network NT such as an intranet.
The PC 20 has a CPU (central processing unit) 21, ROM (read-only memory) 22, RAM (random access memory) 23, input device 24, communication interface 25, display 26, and hard disk drive (HDD) 27. The communication interface 25 enables wireless communication with the order terminal 10, and in this embodiment of the invention is used primarily for receiving order information.
The hard disk drive 27 stores an application program 41 (referred to below as simply “application”) and a style sheet generating program 42. The application 41 functions as a “transmitter” with respect to the devices 50 (receivers) to which information is distributed. The style sheet generating program 42 is a program that generates style sheets, which define the information conversion rules for server 30 side conversion of information to a format compatible with the particular device that is addressed in the group of devices 50.
Similarly to the PC 20, the server 30 has the configuration of a general computer, including a CPU 31, ROM 32, RAM 33, input device 34, display 35, and storage device 36. The storage device 36 stores the integrated device control service 44 and device service registration program 46 in addition to a database 45. The style sheets described above and information related to the device control services 73, 75 (see FIG. 2) for the devices 50 are stored in the database 45.
The integrated device control service 44 is an essential component of this embodiment of the invention. The integrated device control service 44 converts information acquired from the PC 20 (application 41) using style sheets read from the database 45 to information appropriate to the devices 50, and outputs to the device control services 73, 75 corresponding to the devices 50.
The device service registration program 46 is a program for registering the presence of the device control services 73, 75 on the network NT in the database 45 so that they can be recognized by the integrated device control service 44.
The devices 50 include, for example, a POS terminal 51 and a kitchen printer 61 connected to the POS terminal 51, a cooking equipment protocol converter 52 and cooking equipment 62 connected to the protocol converter 52, and various other devices with a network NT connection capability (such as a kitchen display 63, lighting fixtures 64, air conditioner 65, audio/visual (A/V) equipment 66, table display 67, and coupon generator 68). The POS terminal 51 and protocol converter 52 function as a “receiver” that receives information distributed from the application 41 to control local devices that cannot be directly connected to the network NT, such as the kitchen printer 61 connected to the POS terminal 51 and the cooking equipment 62 connected to the protocol converter 52.
The in-house management system SY thus integrally controls the devices 50 according to order information output from the order terminal 10. More specifically, when the order information includes an order for the grill department, the in-house management system SY causes the kitchen printer 61 installed in the grill department of the kitchen to issue an order preparation ticket. When the order information includes an order for the drink department, the in-house management system SY causes the kitchen printer 61 installed in the drink department of the kitchen to issue an order preparation ticket.
The in-house management system SY also displays recipe information for the ordered dishes on the kitchen display 63, and based on the order information selects a fixture (such as indirect lighting or a spot light) from among the lighting fixtures 64 and causes the selected fixture to illuminate with a brightness determined by the order information.
The in-house management system SY also outputs commands for adjusting the temperature or humidity to the air conditioner 65 according to the order information, and causes the A/V equipment 66 to output video and audio according to the order information at the picture quality and sound quality determined by the order information.
The in-house management system SY also displays the order, information about the ingredients used in the ordered dishes, calorie information, and allergy information, for example, on the table display 67 located at the table where the customer who placed the order is seated, and causes the coupon generator 68 to issue coupons based on the order information.
The in-house management system SY can thus control local devices selected in accordance with one customer order from the group of plural different types of devices 50 that are used in the restaurant. The method enabling the in-house management system SY to accomplish this is described next in detail.
FIG. 2 is a block diagram showing specific functions of the server 30. The server 30 includes the integrated device control service 44 and database 45 described above. The server 30 also has a style sheet management unit 71, device control service management unit 72, and device control service 73 for an existing device 50a. 
The style sheet management unit 71 manages the style sheets (including storing, deleting, and changing the style sheets). The style sheet management unit 71 also supplies a style sheet generating tool (not shown in the figure) for easily generating style sheets to the PC 20.
An example of a style sheet generating tool supplied by the style sheet management unit 71 is, for example, a tool that can change the format by only changing predefined items of a style sheet used for conversion to the XMLPOS format in order to print receipts on the kitchen printer 61.
The device control service management unit 72 functions by executing a device service registration program 46 (see FIG. 1), and manages (including storing, deleting, and changing) the device control services 73, 75 on the network NT. The device control service management unit 72 searches and references the device control services 73, 75 using private UDDI (Universal Description, Discovery and Integration).
The device control service 73 is a service for controlling an existing device 50a. When an existing device driver is used, a command conversion module for the existing device driver and an existing driver API (neither of which is shown in the figures) are also needed. It should be noted that some local devices in the group of devices 50, such as devices that have an internal device control service 75, do not require a device control service 73 in the server 30. Such devices 50 (referred to below as “new device 50b”) can communicate directly with the integrated device control service 44 for data input and output. If services are defined using the Web Services Description Language (WSDL), the device control service 75 may be located in either the devices 50 or the server 30.
The database 45 includes a style sheet database 81 (storage unit) that stores style sheets, and a device-specific service information database 82 that stores information related to the device control services 73, 75 (“device-specific service information” below).
The style sheet database 81 stores style sheets acquired from the PC 20 (the style sheets registered by the style sheet management unit 71). These style sheets are written in the eXtensible Stylesheet Language (XSL).
The device-specific service information database 82 stores the device-specific service information registered by the device control service management unit 72. The device-specific service information is written in WSDL.
The integrated device control service 44 includes a communication interface 84, XML (eXtensible Markup Language) document converter 85, and device-specific XML document input/output unit 86.
Note that the “output data acquisition unit,” “distribution information acquisition unit,” “distribution unit,” “distribution decision unit,” and “response unit” in the accompanying claims are equivalent to the integrated device control service 44. The integrated device control service 44 primarily executes an information distribution process that distributes information from the PC 20, and a response process from the devices 50 (existing device 50a and new device 50b).
Note, further, that in the information distribution process the information supplied from the application 41 or other transmitter is referred to below as the “distribution information.” When supplied from the application 41, this distribution information can be acquired simultaneously to the output data from the application 41 (that is, attached to the output data). The information input from the devices 50 in the response process is called the “distribution result.”
For example, when the information distribution process executes, the communication interface 84 acquires distribution information including the output data (order information) from the application 41 and information related to the target device to which the output data is addressed (the receiver to which the information is distributed) and the style sheet for outputting data to that receiver (the “output style sheet”). This information is written in XML, and is referred to below as XML document 1.
The XML document converter 85 converts the XML document 1 acquired from the communication interface 84 to an XML document (referred to as XML document 2 (first conversion data, second conversion data)) containing device control commands (device control information) for the target device based on the output style sheet read from the style sheet database 81. Note that the XML document converter 85 converts the XML document using an XSL Transformation (XSLT).
The device-specific XML document input/output unit 86 outputs the XML document 2 acquired from the XML document converter 85 to the device control services 73, 75 corresponding to the target device.
When the response process executes, the device-specific XML document input/output unit 86 inputs an XML document including the distribution result (input data) from a device 50 (“XML document 3”) to the XML document converter 85.
The XML document converter 85 converts the input XML document 3 to an XML document for the application 41 (“XML document 4 (input conversion data)” below) based on the style sheet for data input (the “input style sheet” below) read from the style sheet database 81. The communication interface 84 then inputs the XML document 4 acquired from the XML document converter 85 to the application 41.
Referring to the domain model shown in FIG. 3, the “distribution information” class used in the information distribution process and the “distribution result” class used in the response process are described in detail. Note that the square brackets added to each information class denote multiplicity. Multiplicity is a term used in the Unified Modelling Language (UML), and denotes the number of attributes in the distribution information or other information object. Examples of multiplicity include the following.
[1] The number of attributes is 1.
[1..*] The number of attributes is greater than or equal to 1.
[0..1] The number of attributes is greater than or equal to 0 and less than 1.
[0..*] The number of attributes is greater than or equal to 0.
As shown in FIG. 3A, the distribution information class has one or more “receiver information” attributes (“first receiver information” below). By defining a plurality of receiver information attributes, the application 41 can broadcast one unit of output data to a plurality of receivers (broadcast process). More specifically, referring to FIG. 3A, broadcast receiver information is represented by two or more receiver information attributes constituting the distribution information class based on the multiplicity setting.
The receiver information has an addressee information attribute that identifies the device targeted as the receiver (device control services 73, 75), an output style sheet information attribute that identifies the output style sheet for converting to information suitable for the target device, an input style sheet attribute that specifies the input style sheet for converting to information suitable to the application 41 acting as the transmitter, a time limit attribute that is used as a standard for determining distribution errors, and a receiver information (“substitute receiver information” below) attribute related to the receiver (“substitute receiver” below) to which the information is alternatively distributed when the information is not distributed successfully.
It should be noted that the substitute receiver information includes the same components as the receiver information attribute of the distribution information class. More specifically, the receiver information attribute has a hierarchical structure, and the order of priority is determined according to the hierarchy. Therefore, when distribution based on the substitute receiver information attribute is not completed normally, distribution proceeds based on the substitute receiver information next-lowest in priority, and such substitution repeats.
Note that declaration of “class” and “attribute” is omitted below for brevity.
The distribution result is described next.
As shown in FIG. 3B, the distribution result has receiver information (first receiver information) related to one or more receivers to which distribution was attempted. The receiver information includes “address information” for identifying the target device designated as the receiver, the “transmission result” describing the result of transmission to the target device, and “receiver information (substitute receiver information)” related to the receiver (substitute receiver) to which the information is alternatively distributed when the information is not distributed normally.
The transmission result includes “success information” denoting whether transmission succeeded or not, “auxiliary information” denoting the status of the target device, and “response information” that is input data from the target device.
Note that the distribution information and distribution result may be combined as shown in FIG. 3C. More specifically, the distribution result class can be added to the data structure of the distribution information class, and the request message schema (see FIG. 7) and the response message schema (see FIG. 11) can be combined into a single schema.
The information distribution process and response process are described next with reference to FIG. 4 and FIG. 5. FIG. 4 is a flow chart showing the information distribution process of the in-house management system SY. As shown in the figure, the PC 20 (application 41) generates and sends an output style sheet and an input style sheet to the server 30 before starting the information distribution process (S01). The server 30 (style sheet management unit 71) stores these style sheets in the style sheet database 81 (S02).
The PC 20 generates output data in conjunction with acquiring order information from the order terminal 10, and sends the output data with the distribution information as XML document 1 to the server 30 (integrated device control service 44) (S03). Note that the distribution information may be transmitted before the output data is distributed.
The server 30 acquires the XML document 1 from the PC 20 (S04, communication interface 84), and converts XML document 1 to XML document 2 based on the previously stored output style sheet (S05, XML document converter 85).
In step S05 the output style sheet is specified by the output style sheet information contained in the receiver information of the distribution information. As a result, a different output style sheet can be applied to each receiver (device 50). Therefore, when the receiver is the kitchen printer 61, the XML document 1 can be converted to XML document 2 in XMLPOS (an industry-standard XML document describing control information for POS devices), and when the receiver is the kitchen display 63, the XML document 1 can be converted to XML document 2, which is written in XHTML or other data display language.
While detailed description is omitted below, conditional expressions can also be included in each output style sheet. When a conditional expression is included in the output style sheet, XML document 1 is converted to XML document 2 only if the output data in the XML document 1 satisfies the conditional expression. In other words, if the output data in XML document 1 does not satisfy the conditional expression contained in the output style sheet, XML document 1 is not converted to XML document 2 and is not distributed. However, because different conditional expressions can be set according to the output style sheet, a broadcast process can be configured that specifies two kitchen printers 61 as the receivers, outputs to the first kitchen printer 61 when the output data satisfies a particular condition, and outputs to the second kitchen printer 61 when the output data does not satisfy a particular condition.
The server 30 then outputs the XML document 2 after conversion to the device control service 73, 75 of the device 50 (S06, device-specific XML document input/output unit 86). Note that the addressee (target device) is identified by the addressee information contained in the receiver information of the distribution information. The device 50 (device control services 73, 75) then acquires the XML document 2 from the server 30 (S07).
The response process of the in-house management system SY is described next with reference to the flow chart in FIG. 5.
The device 50 generates and sends to the server 30 an XML document 3 containing success information, auxiliary information, and response information as the distribution result to the XML document 2 acquired in S07 (S11). The server 30 receives the XML document 3 (S12, device-specific XML document input/output unit 86) and based on the previously stored input style sheet converts the XML document 3 to XML document 4 (S13, XML document converter 85). Note that the input style sheet is the style sheet specified by the input style sheet information contained in the receiver information of the distribution information and read from the style sheet database 81. As a result, when the server 30 is connected to a plurality of PCs 20 (application 41), conversion to the appropriate information format is possible using a different input style sheet for each application 41 (transmitter). Note that the server 30 can identify the transmitter PC 20 to the receiver device 50 using a transport protocol (such as a TCP/IP protocol).
When the server 30 sends XML document 2 to a plurality of devices 50, the distribution results (XML document 3) from the plural devices 50 are combined and converted to XML document 4. The server 30 then inputs the XML document 4 after conversion to the PC 20 that transmitted the XML document 1 (output data) (S14). The PC 20 (application 41) that was the transmitter thus acquires the XML document 4 input from the server 30 (S15).
Specific examples of the output data, distribution information, output style sheet, and distribution result are described next with reference to FIG. 6 to FIG. 11.
FIG. 6 shows an example of the output data that is equivalent to the XML document 1. This example shows the output data generated when order information for one draft beer, one sirloin steak, and one caesar salad is acquired from the order terminal 10. As indicated by reference numeral 101, the output data contains information denoting a sequence number, item ID, and item name (food or beverage name). Note that in this example item IDs for drinks are in the 100 range, item IDs for the grill department are in the 200 range, and item IDs for the salad department are in the 300 range. The output data may also include such information as the restaurant name, date and time the order was placed, the ID of the order terminal 10, a code identifying the operator of the order terminal 10, the price (unit and total), and customer data (such as sex and approximate age).
FIG. 7 shows an example of the distribution information that is equivalent to XML document 1. This example contains receiver information for five kitchen printers 61. As indicated by reference numeral 111, in the first device class KitchenPrinter1 is the first receiver, the substitute receiver therefor (<DeviceRejected>) is KitchenPrinter2, and the substitute receiver therefor (<DeviceRejected>) is KitchenPrinter3. Therefore, the data is first sent to KitchenPrinter1. If a distribution error occurs, transmission to KitchenPrinter2 is attempted, and if a distribution error occurs with KitchenPrinter2, transmission to KitchenPrinter3 is attempted (substitution process).
As indicated by reference numeral 112, KitchenPrinter4 is the first receiver in the second device class, and the substitute receiver therefor is KitchenPrinter5. Therefore, the data is first sent to KitchenPrinter4, and if a distribution error occurs, transmission to KitchenPrinter5 is attempted (substitution process).
As indicated by reference numeral 113, the third device class has the same configuration as the second device class. Therefore, the data is first sent to KitchenPrinter6, and if a distribution error occurs, transmission to KitchenPrinter7 is attempted (substitution process).
Note, further, that in this example the first device class relates to the kitchen printer 61 in the grill department, the second device class relates to the kitchen printer 61 in the salad department, and the third device class relates to the kitchen printer 61 in the drink department, and an output style sheet is specified for each of the devices 50 (departments). As also described above output style sheet information and a time limit are also specified for each receiver in the distribution information. Note, further, that the input style sheet information that can be included in the distribution information is not shown in FIG. 7 and description thereof is omitted.
FIG. 8A shows an example of the output style sheet produced for the kitchen printer 61 in the drink department. As indicated by reference numeral 121, this figure shows a style sheet for printing order content (that an order was received and the names and quantities of the ordered items) for items with an item ID (menu ID) in the 100 range. Note, further, that the <xsl:if test> class denoted by the wavy line is a conditional expression for applying this style sheet. Therefore, this style sheet is applied when the item ID contained in the output data is for an item in the 100 range. Furthermore, by applying this style sheet, XML document 2 is written in a printer language (XMLPOS) that can be interpreted by the POS terminal 51 connected to the kitchen printer 61.
FIG. 8B shows an example of XML document 2. FIG. 8B shows an example of XML document 2 when information is converted based on the output style sheet shown in FIG. 8A. More specifically, as indicated by reference numeral 122, XML document 2 describes a command for printing order content on a kitchen printer 61 in the drink department (that is, KitchenPrinter6 and KitchenPrinter7).
FIG. 9A shows an example of an output style sheet produced for the kitchen printer 61 in the grill department. As indicated by reference numeral 123, this figure shows a style sheet for printing order content for items with an item ID (menu ID) in the 200 range. Note also that the underlined part indicates the part that differs from the output style sheet shown in FIG. 8A, and is equivalent to a conditional expression for applying the output style sheet shown in FIG. 9A. Therefore, this style sheet is applied when the item ID contained in the output data is for an item in the 200 range.
FIG. 9B shows an example of XML document 2 when information is converted based on the output style sheet shown in FIG. 9A. More specifically, as indicated by reference numeral 124, XML document 2 describes a command for printing order content on a kitchen printer 61 in the grill department (that is, KitchenPrinter1, KitchenPrinter2, and KitchenPrinter3 in FIG. 7). Note that the underlined part indicates the part that differs from content of XML document 2 shown in FIG. 8B.
FIG. 10A similarly shows an example of an output style sheet produced for the kitchen printer 61 in the salad department. As indicated by reference numeral 125, this figure shows a style sheet for printing order content for items with an item ID (menu ID) in the 300 range. Note also that the underlined part shows the conditional expression, and this style sheet is applied when the item ID contained in the output data is for an item in the 300 range.
FIG. 10B shows an example of XML document 2 when information is converted based on the output style sheet shown in FIG. 10A. More specifically, as indicated by reference numeral 126, XML document 2 describes a command for printing order content on a kitchen printer 61 in the salad department (that is, KitchenPrinter4 and KitchenPrinter5 in FIG. 7).
FIG. 11 shows an example of the distribution result equivalent to XML document 4. The example shown in this figure corresponds to the distribution information shown in FIG. 7. More specifically, as indicated by reference numerals 131 to 133, the following content is described in this document. That is, “transmission to the first receivers KitchenPrinter1 and KitchenPrinter4 was attempted, KitchenPrinter1 did not find a device 50 and operation failed, and transmission to the substitute receiver KitchenPrinter2 was tried. However, KitchenPrinter2 timed out and operation failed. Transmission was therefore attempted to KitchenPrinter3, that is, the substitute receiver next lowest in priority, and operation was successful. KitchenPrinter4 and KitchenPrinter6 operated normally, and transmission to substitute receivers KitchenPrinter5 and KitchenPrinter7 was not attempted.”
Note that the “transmission result” related to the distribution result shown in FIG. 3 is equivalent to the information between the <Device> and </Device> tags in FIG. 11. The “success information” in the transmission result shown in FIG. 3 is equivalent to the information between the <Response> and </Response> tags, and the auxiliary information and response information in FIG. 3 are equivalent to the information between the <BusinessError> and </BusinessError> tags.
Sequential processing by the server 30 is described next with reference to FIG. 12 to FIG. 19. Sequential processing includes a substitute process executed when information distribution fails, and a linked process executed when information distribution is successful as shown in FIG. 16B. The substitution process of the server 30 is described first with reference to FIG. 12 to FIG. 15.
As described above, the server 30 attempts to distribute the information to a substitute receiver when information cannot be correctly sent to the first receiver, but if the same information is sent it may not be possible to achieve the desired object, and it may not be possible to operate the substitute receiver correctly if the first receiver and substitute receiver are different types of devices 50. A process for solving this problem is described below.
FIG. 12 is a flow chart of the substitution process of the server 30.
When the server 30 (integrated device control service 44) receives XML document 3 as a result of the response process in FIG. 5 (S21, equivalent to S12 in FIG. 5), whether information distribution was successful is determined (S22). If it is determined that the information was not distributed normally (S22 returns No), whether substitute receiver information is included in the distribution information is determined (S23). If substitute receiver information is included in the distribution information (S23 returns Yes), XML document 1 is converted to XML document 2 (S24, XML document converter 85) based on the output style sheet for the substitute receiver (“substitute output style sheet” below) and the resulting XML document 2 is output to the device control services 73, 75 of the target device designated as the substitute receiver (S25, device-specific XML document input/output unit 86).
Note that when information is distributed to a substitute receiver, whether information distribution was successful is determined (S22) based on the XML document 3 acquired as a result of the information distribution. If information distribution was not successful (S22 returns No), whether or not there is another substitute receiver with even lower priority is determined (S23), and if substitute receiver information is contained in the distribution information (S23 returns Yes), processing continues from step S24.
However, if it is determined that the information was distributed normally (S22 returns Yes), or if substitute receiver information is not contained in the distribution information (S23 returns No), XML document 3 showing the distribution result is converted to XML document 4 based on the input style sheet without distribution to a substitute receiver (S26, equivalent to S13 in FIG. 5), and the resulting XML document 4 is input to the application 41, that is, the transmitter (S27, equivalent to S14 in FIG. 5).
Specific examples of the substitute output style sheets are described next with reference to FIG. 13 to FIG. 15.
FIG. 13A shows an example of an output style sheet for outputting from the drink department to a kitchen printer 61 in another department (grill department or salad department), and corresponds to the output style sheet when the output style sheet shown in FIG. 8 is the output style sheet for the first receiver (referred to below as the “first output style sheet”).
Note, further, that in FIG. 13 to FIG. 15 the underlined parts indicate the parts that differ from the content of the output style sheet and XML document 2 shown in FIG. 8. It is therefore possible to generate a substitute output style sheet, and therefore execute the substitution process of this embodiment of the invention, by changing only the underlined parts (that is, without needing to change the application 41).
As indicated by reference numeral 141, the substitute output style sheet in FIG. 13A is a style sheet for printing with the order content a message requesting delivery to the drink department (the original intended receiver) based on an item with an item ID in the 100 range (conditional expression). In other words, if the kitchen printer 61 in the drink department is not operating normally because the paper ran out, for example, the content can be printed using a kitchen printer 61 in another department based on XML document 2 shown in FIG. 13B (see reference numeral 142). This enables personnel in another department to deliver the printout of the preparation instructions to the drink department so that kitchen work is not interrupted.
Note that the substitute output style sheet shown in FIG. 13A can also be used by kitchen printers 61 in other departments (the grill department or salad department in this example). In other words, it is not always necessary to prepare a different output style sheet for each device 50. In addition, instead of inserting additional information such as “please take to the drink department” in the middle of the order preparation ticket, the substitute output style sheet may be written to contain instructions for printing the additional information in the header of the page or on a separate instruction page.
FIG. 14A shows an output style sheet for controlling operation of cooking equipment 62 (drink dispenser) in the drink department. FIG. 15A shows an output style sheet for controlling operation of the kitchen display 63 in the drink department. Note that the output style sheet in FIG. 15 is the substitute output style sheet when the output style sheet shown in FIG. 14 is the first output style sheet.
As indicated by reference numeral 151, the output style sheet in FIG. 14A is a style sheet for instructing the drink dispenser to poor the item (drink) with an item ID in the 100 range (conditional expression) into a glass. The XML document 2 (see reference numeral 152) shown in FIG. 14B can be generated based on this output style sheet. Note that XML document 2 is written in a language that can understood by the protocol converter 52 (see FIG. 1).
As indicated by reference numeral 161, the output style sheet in FIG. 15A is a style sheet for the kitchen display 63 in the drink department and causes the kitchen display 63 to display the order content for an item (drink) with an item ID in the 100 range (conditional expression). The XML document 2 (see reference numeral 162) shown in FIG. 15B can be generated based on this style sheet. Note that XML document 2 is written in a language (XHTML) that can understood by the kitchen display 63.
If, as shown in FIG. 14 and FIG. 15, the drink dispenser does not function properly, the same objective (presenting a drink order) can be achieved using the kitchen display 63. That is, by adding receiver information to the distribution information, and generating a substitute style sheet overwriting the underlined portion, the same object can be achieved using a different type of device 50, and there is no need to change the application 41 at all.
A sequential process including a linked process is described next with reference to FIG. 16 to FIG. 19.
FIG. 16A shows the configuration of the distribution information and distribution result when executing a sequential process including a linked process. This configuration differs from the distribution information and distribution result class shown in FIG. 3C in that “linked receiver information” is included in the receiver information. This linked receiver information is information related to the receiver (“linked receiver” below) to which information is sent next when the information is distributed normally.
Note, further, that as described above the substitute receiver information shown in FIG. 16A is information related to the substitute receiver to which the information is alternatively sent when the information is not distributed normally, and is equivalent to the receiver information in the receiver information class shown in FIG. 3C.
As shown in FIG. 16B the linked receiver information and substitute receiver information each have a hierarchical structure. More specifically, the hierarchical structure shown in the figure contains receiver information (first receiver information) related to device 1, device 2, and device 3 in the distribution information, and includes linked receiver information (second receiver information) setting device 11 as the linked receiver and substitute receiver information setting device 10 as the substitute receiver in the receiver information for device 1. The receiver information for device 11 includes linked receiver information (third receiver information) setting device 111 as the linked receiver and substitute receiver information setting device 110 as the substitute receiver.
Therefore, when information is broadcast to device 1, device 2, and device 3 and distribution to device 1 is successful, information is distributed to device 11 (linked process). If transmission to device 1 fails, information is sent to device 10 (substitution process). If transmission to device 11 succeeds, information is distributed to device 111 (linked process), but if transmission fails, information is distributed to device 110 (substitution process).
FIG. 17 is a flow chart showing the sequential process of the server 30.
When the server 30 receives XML document 3 as a result of the response process in FIG. 5 (S31), whether information distribution was successful is determined (S32). If it is determined that the information was distributed normally (S32 returns Yes), whether or not linked receiver information (second receiver information) is contained in the distribution information is determined (S33). If linked receiver information is contained in the distribution information (S33 returns Yes), XML document 1 is converted to XML document 2 (S34) based on the output style sheet for the linked receiver (referred to below as the “linked output style sheet” (second output style sheet)), and the resulting XML document 2 (second conversion data) is output to the device control service 73, 75 of the target device designated as the linked receiver (S35). When information is distributed to the linked receiver, whether information distribution succeeded is determined based on the XML document 3 acquired in response to the distributed information (S32). If distribution succeeded (S32 returns Yes), whether or not linked receiver information with a lower priority setting was received is determined (S33), and if linked receiver information is contained in the distribution information (S33 returns Yes), processing continues accordingly from S34.
If linked receiver information is not contained in the distribution information (S33 returns No), XML document 3 describing the distribution result is converted to XML document 4 based on the input style sheet without outputting to the linked receiver (S39), and the resulting XML document 4 is input to the application 41 (the transmitter) (S40). Note that if step S32 determines that the information was not distributed normally (S32 returns No), a process identical to steps S23 to S27 in FIG. 12 is executed (S36 to S40).
Note that a flow chart of the linked process alone (sequential process not including a substitution process) is the same as the flow chart in FIG. 12 if S22 is changed from “distribution successful?” to “distribution failed?,” S22 is changed from “substitute receiver information” to “linked receiver information,” and S24 is changed from “substitute output style sheet” to “linked output style sheet.” The flow chart is therefore not shown in the figures or described herein.
Referring to FIG. 18 and FIG. 19, specific examples of the distribution information and distribution result for executing a sequential process including a linked process are described next. Note, further, that a “receiver” below denotes a logic structure contained in one device 50. In this example two logic structures (functions), that is, a “printer” and a “buzzer,” are contained in the kitchen printers 61 shown in FIG. 1, the receivers KitchenPrinter1 and Buzzer1 are included in the first kitchen printer 61, and KitchenPrinter2 and Buzzer2 are included in the second kitchen printer 61.
FIG. 18 shows an example of distribution information that is equivalent to XML document 1. This document contains receiver information for four logic structures contained in two kitchen printers 61. As indicated by reference numeral 171, KitchenPrinter1 is the first receiver, and the linked receiver (second receiver) (<DeviceOK>) is Buzzer1. The substitute receiver (<DeviceRejected>) for the first receiver KitchenPrinter1 is KitchenPrinter2, and the linked receiver is Buzzer2.
Information is therefore first sent to KitchenPrinter1, and distribution to Buzzer1 is attempted if distribution to KitchenPrinter1 succeeds. If distribution to KitchenPrinter1 fails, distribution to KitchenPrinter2 is attempted, and if distribution to KitchenPrinter2 succeeds, transmission to Buzzer2 is attempted.
FIG. 19 shows the distribution result for the distribution information shown in FIG. 18. The code object denoted by reference numeral 181 shows the success information of the sequential process based on the distribution information shown in FIG. 18, and shows that distribution was successful. The code object denoted by reference numeral 182 shows the result of distribution to each receiver. More specifically, this code object says that “transmission to the first receiver KitchenPrinter1 was attempted, but because operation failed transmission to the substitute receiver KitchenPrinter2 was attempted. Because KitchenPrinter2 operated normally, transmission to the associated linked receiver Buzzer2 was attempted, and Buzzer2 operated normally.”
This means that an order ticket was issued by KitchenPrinter2 and a buzzer was sounded to signal that a ticket was issued. Note that the success information of the complete sequential process denoted by reference numeral 181 matches the success information of the receiver Buzzer2 that operated last.
A complex sequential process can be thus executed by combining a linked process and a substitution process as shown in FIG. 16 to FIG. 19. The sequential process is also not limited to execution by a plurality of devices 50 with different physical configurations, and can be executed by a plurality of logic structures contained in one device 50.
As described above, the in-house management system SY according to this embodiment of the invention can absorb changes in process content and differences in the type and specifications of the devices 50 by style sheets, and can therefore render direct control of devices by the application 41 unnecessary. Writing the application 41 is thus easier, and changing the application 41 due to changes in process content or device 50 replacement can be made unnecessary.
Furthermore, because two different device control services 73, 75 corresponding to existing device 50a and new device 50b can be called by the device-specific XML document input/output unit 86, changing the application 41 due to replacement of an existing device 50a with a new device 50b can be made unnecessary.
Furthermore, by writing the output data, distribution information, and distribution result in XML, they can be easily edited using a simple text editor, and there is no need to create new data conversion rules other than in XSL.
Furthermore, by writing the device-specific service information (information related to device control services 73, 75) in WSDL, Web services can be easily included.
Yet further, by using XMLPOS as a printer language, more than thirty different types of POS devices can be controlled regardless of manufacturer.
Furthermore, because an input style sheet can be specified for each application 41, that is, transmitter, the integrated device control service 44 can acquire the XML document 4 (distribution result) for a particular application 41 even when the integrated device control service 44 is called by a plurality of applications 41.
Furthermore, because the output style sheet can contain conditional expressions, distribution of the output data can be restricted. As a result, distribution of the output data can be restricted to only when the item ID associated with a certain department is included in the output data.
In addition, because the conditional expressions can be set specifically for a particular output style sheet (for a particular device), a conditional broadcast process can be constructed by setting plural devices 50 as the receiver.
Furthermore, because information is distributed based on substitute receiver information when information is not distributed normally based on the first receiver information, operation can be normally controlled even when the specifications of the first receiver and the substitute receiver differ. In addition, because information is distributed based on the linked receiver information when information is distributed normally based on the first receiver information, a plurality of receivers can be caused to operate sequentially based on output of a single data object from the application 41. In other words, a linked process using a plurality of receivers can be executed without going through the application 41.
In addition, because the description language used to write XML document 2 can be specified in the output style sheet, plural different devices 50 that can understand different description languages can be addressed. As a result, the devices 50 can be easily interchanged as needed according to the system configuration of a particular business.
It should be noted that while an in-house management system SY is described by way of example in the embodiment described above, the server 30 (integrated device control service 44) according to this embodiment of the invention can also be adapted to other environments. For example, when the server 30 according to this embodiment of the invention is deployed in a sales promotion management system having an e-mail transmitting device, page printer, large format printer, electronic shelf labels, and a POS computer as devices 50, customers interested in clearance items may be extracted from a customer database when triggered by receiving clearance sale information, and the sale information can be sent to the e-mail transmitter. In this scenario coupon information is attached to mail sent to premium customers, and if transmission to a first e-mail address fails, the mail is resent to a second e-mail address (substitution process). Direct mail for sending by post, for example, is printed by the page printer for customers without a registered e-mail address, and POP materials with sale information are printed on the large format printer. A command to change the product price to the sale price is also output to the electronic shelf label, and another command to update the product price stored in the master price list is sent to the POS computer.
An example of a conditional expression used in the foregoing embodiment is that an item ID for an item in the addressed department is contained in the output data, but other conditions, such as “customer information indicating a male customer is contained in the output data” or “time/date information denoting a midnight time period is contained in the output data,” may also be defined. The conditional expression is also not limited to content contained in the output data, and the conditional expression may be set based on factors related to the output data, such as “the output data exceeds a specified size” or “the output date/time of the output data meets specific conditions.”
The <xsl:if test> class is shown by way of example as a conditional expression in the foregoing embodiment (see FIG. 8A), but the invention is not so limited and other classes, such as <xsl:choose> and <xsl:template>, may also be used.
The substitution process for substituting identical devices is described in the foregoing embodiment, but may also be used for transferring information between POS terminals 51. For example, if a POS terminal 51 (first receiver) fails in a supermarket that has plural POS terminals 51, a receipt bearing the ID of a neighboring POS terminal 51 could be issued from the printer of a neighboring POS terminal 51 designated as the substitute receiver.
The substitution process between different types of devices described in the foregoing embodiment may also be used to issue coupons. For example, when an electronic value reader/writer or point card reader/writer (a device that issues an electronic coupon, a first receiver) fails, coupons can be issued from a coupon printer (a device that prints a paper coupon) that is specified as the substitute receiver. Services using the integrated device control service 44 can also be provided in different environments.
Components of the server 30 and PC 20 described in the foregoing embodiment can also be rendered as programs, and the programs can be supplied stored on various kinds of media, including CD-ROM and flash memory devices. More specifically, a program causing a computer to function as components of the server 30 and PC 20, and recording media storing said program, are also included in the scope of the invention. It will be obvious to one with ordinary skill in the related art that other changes are possible without departing from the scope of the accompanying claims.
The invention being thus described, it will be obvious that it may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

## Claims

1. An information distribution system comprising:
a computer configured to output output data;
a server connected to the computer and configured to distribute information;
a first device connected to the server; and
a second device connected to the server; wherein the server includes:
a storage unit configured to store a first style sheet defining information conversion rules for the first device and a second style sheet defining information conversion rules for the second device;
an output data acquisition unit configured to acquire the output data from the computer;
a distribution information acquisition unit configured to acquire distribution information containing first device information and second device information, the first device information including first information specifying an address of the first device and the first style sheet, and the second device information including second information specifying an address of the second device and the second style sheet;
a distribution unit configured to distribute first conversion data resulting from converting the output data according to the first style sheet or second conversion data resulting from converting the output data according to the second style sheet; and
a distribution decision unit configured to determine if distribution of the first conversion data by the distribution unit was successful;
wherein the distribution unit is configured to distribute the second conversion data to the second device in accordance with a result of a distribution success decision of the distribution decision unit.

2. The information distribution system described in claim 1, wherein:
the second device is a linked receiver to which the distribution unit is configured to transmit second conversion data when the distribution decision unit determines distribution of the first conversion data was successful.

3. The information distribution system described in claim 1 further comprising:
a third device connected to the server; wherein the storage unit is configured to store a third style sheet defining information conversion rules for the third device;
the distribution information acquisition unit is configured to acquire the distribution information containing third device information, the third device information including third information specifying an address of the third device and the third style sheet and receiver information objects having a priority setting; and
the distribution unit is further configured to distribute information based on the receiver information objects when distribution of the second conversion data was successful.

4. The information distribution system described in claim 1, wherein:
the distribution information includes a time limit used as a distribution error decision standard; and
the distribution decision unit is configured to determine that the distribution was not successful if the distribution is not completed to the first device when the time limit is reached.

5. The information distribution system described in claim 1, wherein:
the first receiver information includes an input style sheet defining information conversion rules according to the computer; and
the server includes a response unit that is configured to input input conversion data acquired by converting input data from the first device according to the input style sheet to the computer.

6. The information distribution system described in claim 1, further comprising:
a second computer that is configured to output output data;
wherein the output data acquisition unit is configured to acquire second output data from the second computer; and the storage unit is configured to store a second input style sheet corresponding to the second computer.

7. The information distribution system described in claim 1, wherein:
the output data, the first conversion data, and the second conversion data are markup documents.

8. The distribution system described in claim 1, wherein:
the first conversion data and the second conversion data are written in different description languages; and
the first device and the second device are configured to interpret different description languages.

9. The information distribution system described in claim 1, wherein:
a plurality of receiver information objects with the same priority setting are included in the distribution information.