JP6750450B2 - Electronic information storage medium, data transmission method, IC card, and data transmission program - Google Patents

Description

The technical field of IC cards and the like.

In recent years, the use of IC cards has expanded, and various data such as personal information and transaction data are recorded in a memory. FIG. 1 is a diagram showing a configuration example of a file that stores data regarding an application. The data is stored in a file under the folder in a format such as a data object. The folder has an issuance-time storage file that stores a data object at the time of card issuance and an additional-writing file that stores an additionally-written data object. In such a file structure, when the contents of the data object 1-1 are changed, the data object 1-2 in which the changes are reflected is added to the data object 1-1 without being rewritten. There are times when you are told. For example, when an IC card is issued, a data object in which address information is described is stored, but if the address at the time of issuance is changed after that, the data object in which the changed address information is described is Will be added to. As a result, the address history information is held in the IC card.

The data object is described in, for example, the TLV (Tag-Length-Value) format. The TLV format is a format in which data type (Tag), length (Length), and value (value) are collectively expressed. In the example of the address of this IC card, a value indicating “address information” is set as the data type (Tag), and the actual address information (for example, Tokyo city 〇 〇) is set as the data value (value). A value indicating the town 1-1-1) is set, and a value indicating the length (data length) of the data value (value) is set as the data length (Length). That is, a plurality of data objects having the same Tag value are stored in one IC card.

On the other hand, Patent Document 1 discloses a system for efficiently reading a data object by expanding the file to be searched not only to the current file but also to a specified file when reading the data object.

JP, 2011-191808, A

According to the system described in Patent Document 1, it is possible to efficiently search for a data object, but there is a problem that the case where a data object having the same Tag value exists is not considered.

Therefore, the present invention has been made in view of such a point, and even if a plurality of data having the same Tag value is stored, the external device efficiently acquires desired data. It is an object to provide an electronic information storage medium and the like that can be used.

In order to solve the above-mentioned problems, the invention according to claim 1 is a data storage means for storing a plurality of data which are TLV (Tag-Length-Value) format data and have the same T (Tag) value. And storage order information indicating the order stored in the data storage means for each of the data, and linking information linking the position information indicating the stored position with each T(Tag) value. The information storage means, the acquisition command for acquiring the data stored in the data storage means, the T(Tag) value of the data acquired by the acquisition command, and the order in which the data are stored in the data storage means When the order information is received from the external device, the data stored in the position indicated by the position information associated with the storage order information corresponding to the order information is referred by referring to the association information of the T(Tag) value. Is transmitted to the external device.

A second aspect of the present invention is the electronic information storage medium according to the first aspect, wherein the transmitting means is a substitute for the T(Tag) value and the order information together with the acquisition command. When the predetermined information is received, the most recently stored data is transmitted to the external device by referring to the linking information of the T(Tag) value.

A third aspect of the present invention is the electronic information storage medium according to the first or second aspect, wherein the transmitting means is a substitute for the T(Tag) value and the order information together with the acquisition command. When the predetermined information No. 2 is received, all data having the same T(Tag) value as the T(Tag) value is transmitted to the external device.

A fourth aspect of the present invention is the electronic information storage medium according to any one of the first to third aspects, wherein the data storage means has a first storage area and a second storage area. However, when storing the object data, the object data having the same Tag value as the Tag value of the object data is stored in the first storage area if it is not yet stored, while the same as the Tag value of the object data. If the object data having the Tag value is already stored, the object data is stored in the second storage area, and the transmitting unit replaces the T(Tag) value and the order information together with the acquisition command. When the predetermined information is received, the object data having the same T(Tag) value as the T(Tag) value and stored in the first storage area is transmitted to the external device. It is characterized by

The invention according to claim 5 is a data storage unit for storing a plurality of data having TLV (Tag-Length-Value) format and having the same T (Tag) value, and the data for each of the data. An electronic device comprising storage order information indicating the order stored in the data storage means, and linking information storage means for storing the linking information for linking the position information indicating the stored position for each T(Tag) value. A method for transmitting data by a processor in an information storage medium, comprising: a T(Tag) value of data acquired by the acquisition command together with an acquisition command for acquiring the data stored in the data storage means; When the order information indicating the order stored in the means is received from the external device, the storage order information associated with the order information is referred to by referring to the association information of the T(Tag) value, and the location information associated with the storage order information. A transmitting step of transmitting the data stored in the position shown to the external device.

The invention according to claim 6 is a data storage means for storing a plurality of data having TLV (Tag-Length-Value) format and having the same T(Tag) value; Storage order information indicating the order stored in the data storage means, and linking information storage means for storing linking information for linking the position information indicating the stored position for each T(Tag) value; The T(Tag) value of the data acquired by the acquisition command together with the acquisition command for acquiring the data stored in the means, and the order information indicating the order in which the data is stored in the data storage means are received from the external device. In this case, referring to the associating information of the T(Tag) value, the data stored at the position indicated by the position information associated with the storage order information corresponding to the order information is transmitted to the external device. Means and are provided.

The invention according to claim 7 is a data storage means for storing a plurality of data having TLV (Tag-Length-Value) format and having the same T (Tag) value; An electronic device comprising storage order information indicating the order stored in the data storage means, and linking information storage means for storing the linking information for linking the position information indicating the stored position for each T(Tag) value. The processor in the information storage medium, the T(Tag) value of the data acquired by the acquisition command together with the acquisition command for acquiring the data stored in the data storage unit, and the order in which the data is stored in the data storage unit. When receiving the order information indicating from the external device, it is stored in the position indicated by the position information associated with the storage order information corresponding to the order information with reference to the association information of the T(Tag) value. It is characterized by functioning as transmitting means for transmitting the stored data to the external device.

According to the present invention, even when a plurality of data having the same Tag value is stored, the external device can efficiently send the data together with the acquisition command by specifying the order in which the data to be acquired is stored and the Tag value. The data can be obtained.

It is a figure which shows the structural example of the file which stores data. It is a figure which shows the hardware structural example of the IC chip 1a mounted in the IC card 1. (A) is a diagram showing a configuration example of a storage file at the time of issuance, (B) is a diagram showing a configuration example of a file for additional recording, (C) is a management table (Tag: "005A") It is a figure which shows the structural example, (D) is a figure which shows the structural example of a management table (Tag:"5201"). (A) is a figure which shows the structural example of a data acquisition command, (B) is a figure which shows the structural example of a parameter. It is a flow chart which shows an example of processing at the time of command reception. (A) is a figure which shows the structural example of the storage file in a modification, (B) is a figure which shows the structural example of the management table (Tag: "005A") in a modification, (C) is It is a figure which shows the structural example of the management table (Tag:"5201") in a modification, and (D) is a figure which shows the structural example of the parameter in a modification. It is a flow chart which shows an example of processing at the time of command reception in a modification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment described below is an embodiment in which the present invention is applied to an IC card having an IC chip mounted thereon.

[1. Configuration and Function Outline of IC Chip 1a]
First, with reference to FIG. 2, an outline of the configuration and function of the IC chip 1a mounted on the IC card 1 according to the present embodiment will be described. FIG. 2 is a diagram showing a hardware configuration example of the IC chip 1 a mounted on the IC card 1. The IC card 1 is used as a cash card, a credit card, an employee card, or the like. Alternatively, the IC card 1 is incorporated in a communication device such as a smartphone or a mobile phone. Alternatively, the IC chip 1a may be directly incorporated on the circuit board of the communication device. The IC chip 1a is an example of the electronic information storage medium of the present invention.

As shown in FIG. 2, the IC chip 1a includes a CPU (Central Processing Unit) 10, a RAM (Random Access Memory) 11, a ROM (Read Only Memory) 12, a non-volatile memory 13, and an I/O circuit 14. Composed. The CPU 10 is a processor (computer) that executes various programs stored in the ROM 12 or the nonvolatile memory 13. The I/O circuit 14 serves as an interface with the external device 2. As a result, the IC chip 1a can perform contact or non-contact communication with the external device 2 including the IC reader/writer. In the case of the contact type IC chip 1a, the I/O circuit 14 is provided with, for example, eight terminals C1 to C8. For example, the C1 terminal is a power terminal (a terminal for supplying power to the IC chip 1a), the C2 terminal is a reset terminal, the C3 terminal is a clock terminal, the C5 terminal is a ground terminal, and the C7 terminal is for communicating with an external device 2. Is the terminal. On the other hand, in the case of the non-contact type IC chip 1a, the I/O circuit 14 is provided with, for example, an antenna and a modulation/demodulation circuit. Examples of the external device 2 include an IC card issuing machine, an ATM, a ticket gate, an authentication gate, and the like. Alternatively, when the IC chip 1a is incorporated in a communication device, the external device 2 corresponds to a control unit having a function of the communication device.

For example, a flash memory is applied to the non-volatile memory 13. A part of various programs and data stored in the non-volatile memory 13 may be stored in the ROM 12. The nonvolatile memory 13 may be “Electrically Erasable Programmable Read-Only Memory”. In the present embodiment, the programs stored in either the ROM 12 or the non-volatile memory 13 include an operating system (hereinafter referred to as “OS”), application programs, and the like.

Here, the application program is a program for realizing the function (in other words, module) of the application instance in the IC card 1. As a result, the CPU 10 functions as an application.

In addition, the non-volatile memory 13 is provided with a folder (not shown) for storing data related to the application, and further, a storage file at the time of issuance (FIG. 3A) and a file for additional recording (FIG. )) is provided. The object-time storage file stores object data created by the issuer when the IC card 1 is issued. In the example of FIG. 3A, object data 101 and 102 are stored. The Tag value of the object data 101 is “0x005A”, and the Tag value of the object data 102 is “0x5201”. The additional recording file is object data created by the issuer or a third party after the IC card 1 is issued, and has the same Tag value as any object data stored in the issuing storage file. Object data is stored. In the example of FIG. 3B, object data 201 and 203 having a Tag value of “0x005A” and object data 202 having a Tag value of “0x5201” are stored. That is, the additional write file stores object data that has the same Tag value as any of the object data stored in the issuance-time storage file, but has a different value value. However, object data having the same Tag value and value as any object data stored in the issuing storage file may be added to the additional recording file.

Furthermore, the non-volatile memory 12 stores a management table. The management table is created for each Tag value of the object data stored in the additional write file. In the management table, information indicating the order in which object data having the same Tag value is added to the additional write file (may be referred to as “additional order”) and a reference address indicating the position where the object data is added (for example, , Information indicating an offset value from the start address on the memory area corresponding to the additional recording file (may be referred to as “offset”) is described in association with each other. For example, as shown in FIG. 3B, when the object data is added in the order of the object data 201, the object data 202, and the object data 203, first, when the object data 201 is added, FIG. The management table (Tag: “0x005A”) shown in is created (only the framework of the table in which the data is not described may be created in advance), and the additional order “0x01” and the offset “0x00” are described in association with each other. R. Next, when the object data 202 is added, the management table (Tag: “0x5201”) shown in FIG. 3D is created, and the additional writing order “0x01” and the offset “0x02” are described in association with each other. Next, when the object data 203 is added, the additional order "0x02" and the offset "0x06" are described in the management table (Tag: "0x005A") shown in FIG.

[2. Command summary]
Next, a command for acquiring the object data transmitted from the external device 2 to the IC card 1 (may be referred to as “data acquisition command”) will be described. The data acquisition command includes a header and a body, as shown in FIG. The header is composed of "CLS", "INS", "P1", and "P2". The CLA stores information indicating whether the command designated by INS is ISO compliant or not, and information indicating the channel number of the logical channel. The INS stores information that means acquisition of object data. On the other hand, the body is composed of "Lc" and "DATA". Lc stores information indicating the length of the value stored in DATA. Information indicating the Tag value of the object data to be acquired is stored in DATA. Information for designating the object data to be acquired among the object data having the Tag value designated by DATA is stored in P1 and P2 (a total of 2 bytes of “parameter”) of the header. Specifically, as shown in FIG. 4B, "0x0000" is stored when specifying the object data stored at the time of issue, and "0xFFFF" is specified when specifying the most recently added object data. Is stored. Further, for example, when designating the second additionally written object data, “0x0002” indicating the decimal number 2 (that is, information indicating the order of additional writing) is stored.

[3. Processing when command is received in IC chip 1a]
Next, referring to FIG. 5, the operation when the application of the IC chip 1a (the application that communicates with the external device 2 and is selected by the SELECT command, for example) receives a command from the external device 2 ( The command receiving process) will be described.

First, the application (the CPU 10 that executes the application) determines whether or not a data acquisition command has been received (step S101). Specifically, the determination is made based on the value of INS in the header. When the application determines that it has not received the data acquisition command (receives another command) (step S101: NO), it executes the received command and sends a response to the external device 2 (step S101: NO). 102) and ends the processing shown in the flowchart. On the other hand, when the application determines that the data acquisition command has been received (step S101: YES), it then determines whether the values of the parameters P1 and P2 of the received command are “0x0000” (step S101). S103).

When the application determines that the values of the parameters P1 and P2 are “0x0000” (step S103: YES), the application transmits the object data added at the time of issuance to the external device 2 together with the response (step 104), The process shown in the flowchart is ended. Specifically, the application sets to the external device 2 the object data having the same Tag value as the Tag value indicated by the information stored in the DATA of the received command among the object data stored in the issuance time storage file. Send. On the other hand, if the application determines that the values of the parameters P1 and P2 are not “0x0000” (step S103: NO), then it determines whether the values of the parameters P1 and P2 of the received command are “0xFFFF”. It is determined (step S105).

When the application determines that the values of the parameters P1 and P2 are “0xFFFF” (step S105: YES), the application refers to the management table corresponding to the Tag value of DATA and sets the offset in which the additional write order is the maximum value. It is specified (step S106), the storage position is calculated from the specified offset, the object data at the storage position is transmitted to the external device 2 together with the response (step S108), and the process shown in the flowchart is ended. That is, the application transmits the most recently added object data when the values of the parameters P1 and P2 are “0xFFFF”.

On the other hand, when the application determines that the values of the parameters P1 and P2 are not “0xFFFF” (step S105: NO), the application refers to the management table corresponding to the Tag value of DATA, and the additional write order specified by the parameters is added. Is specified (step S107), the storage position is calculated from the specified offset, the object data at the storage position is transmitted to the external device 2 together with the response (step S108), and the processing shown in the flowchart is ended. .. That is, when the values of the parameters P1 and P2 are not “0xFFFF”, the application transmits the additionally written object data in the additional writing order designated by the parameters.

As described above, in the IC card 1 of the present embodiment, the non-volatile memory 13 (an example of “data storage means” and “association information storage means”) is TLV (Tag-Length-Value) format data. In addition, a plurality of object data (an example of “data”) having the same T(Tag) value is stored, and an additional write order indicating the order in which each object data is stored in the nonvolatile memory 13 (“storage order information”). ") and an offset indicating a stored position (an example of "position information") are stored for each T(Tag) value, and a management table (an example of "link information") is stored. Means)) and a T(Tag) value of the object data acquired by the data acquisition command together with a data acquisition command (an example of the “acquisition command”) for acquiring the object data stored in the non-volatile memory 13, When a parameter indicating the order in which the object data is stored in the nonvolatile memory 13 (an example of “order information”) is received from the external device 2, the management table of the T(Tag) value is referred to The object data stored in the position (position calculated from the offset) indicated by the offset associated with the corresponding additional recording order is transmitted to the external device 2.

Therefore, according to the IC card 1 of the present embodiment, even when a plurality of object data having the same Tag value is stored, the external device 2 specifies the order in which the object data to be acquired is added and the Tag value. The object data can be efficiently acquired by transmitting the data together with the data acquisition command.

Further, in the CPU 10 of the IC card 1, the non-volatile memory 13 has a storage file at the time of issuance (an example of “first storage area”) and a file for additional writing (an example of “second storage area”), When storing the object data, the object data having the same Tag value as the tag value of the object data is stored in the issue-time storage file if it is not stored yet (when it is stored for the first time). When the object data having the same Tag value as the Tag value is already stored, the object data is stored in the additional recording file, and the CPU 10 stores the T(Tag) value and the object data to be acquired in the nonvolatile memory 13 together with the data acquisition command. When a parameter indicating "0x0000" (an example of "third predetermined information") that is a substitute for the parameter indicating the order of addition is received, an object having the same T(Tag) value as the T(Tag) value The data, which is the object data stored in the issuing storage file, is transmitted to the external device 2.

Therefore, according to the IC card 1, the object data stored first can be acquired by transmitting the parameter indicating “0x0000” together with the data acquisition command.

[4. Modification]
Next, a modified example of the above embodiment will be described. The modifications described below can be combined as appropriate.

[4.1. Modification 1]
In the above-described embodiment, the non-volatile memory 13 is provided with the issuance-time storage file and the additional write file as files for storing object data, but in the modification, these are integrated as shown in FIG. A storage file is provided. In the storage file shown in FIG. 6A, object data 301-305 are stored, object data 301, 302 are stored when the card is issued, and object data 303-305 are stored after the card is issued. There is.

Further, the non-volatile memory 13 is provided with a management table for each Tag value of the object data stored in the storage file. The management table of the modification is created for each Tag value of the object data stored when the card is issued. In the management table of the modification, information indicating the order in which the object data having the same Tag value is stored in the storage file (may be referred to as “memory order”) and the reference address indicating the position where the object data is stored (For example, information indicating an offset value from the start address on the memory area corresponding to the storage file) (may be referred to as “offset”) is described in association with each other.

For example, when the object data 301 and the object data 302 are stored when the card is issued, and the object data is stored in the storage file in the order of the object data 303, the object data 304, and the object data 305 after the card is issued, when the card is issued, as shown in FIG. The management table (Tag: “0x005A”) shown in B) is created, and the storage order “0x01” and the offset “0x00” are described in association with each other. Similarly, the management table (Tag: “0x5201”) shown in FIG. 6C is created, and the storage order “0x01” and the offset “0x02” are described in association with each other. Next, when the object data 303 is added, the additional order “0x02” and the offset “0x06” are described in association with each other in the management table (Tag: “0x005A”) shown in FIG. 6B. Next, when the object data 304 is added, the additional order “0x02” and the offset “0x08” are described in association with each other in the management table (Tag: “0x5201”) shown in FIG. 6C. Next, when the object data 305 is added, the additional order “0x03” and the offset “0x0C” are described in the management table (Tag: “0x005A”) shown in FIG.

Next, the data acquisition command in this modification will be described with reference to FIG. The parts other than the parameters (P1, P2) of the data acquisition command are the same as those in the above-mentioned embodiment, and the description thereof will be omitted. Information for designating the object data to be acquired among the object data having the Tag value designated by DATA is stored in P1 and P2 (a total of 2 bytes of “parameter”) of the header. Specifically, as shown in FIG. 6D, “0x0001” is stored when the object data stored at the time of issue (for example, the object data 301 and 302 in FIG. 6A) is designated, When the most recently stored object data is designated, "0xFFFF" is stored. Further, for example, when designating the second recorded object data, “0x0002” indicating the decimal number 2 (that is, information indicating the storage order) is stored.

Next, with reference to FIG. 7, the command reception process in this modification will be described.

First, the application (the CPU 10 that executes the application) determines whether or not a data acquisition command has been received (step S201). Specifically, the determination is made based on the value of INS in the header. When the application determines that it has not received the data acquisition command (receives another command) (step S201: NO), it executes the received command and sends a response to the external device 2 (step S201: NO). 202) and ends the processing shown in the flowchart. On the other hand, when the application determines that the data acquisition command has been received (step S201: YES), then it determines whether the values of the parameters P1 and P2 of the received command are “0xFFFF” (step S201). S203).

When the application determines that the values of the parameters P1 and P2 are “0xFFFF” (step S203: YES), the application refers to the management table corresponding to the Tag value of DATA, and sets the offset whose storage order is the maximum value. It is specified (step S204), the storage position is calculated from the specified offset, the object data at the storage position is transmitted to the external device 2 together with the response (step 206), and the processing shown in the flowchart is ended. That is, the application transmits the most recently stored object data when the values of the parameters P1 and P2 are “0xFFFF”.

On the other hand, when the application determines that the values of the parameters P1 and P2 are not “0xFFFF” (step S203: NO), the application refers to the management table corresponding to the Tag value of DATA, and the storage order specified by the parameter is set. Is specified (step S205), the storage position is calculated from the specified offset, the object data at the storage position is transmitted to the external device 2 together with the response (step 206), and the processing shown in the flowchart is ended. .. That is, the application transmits the object data stored in the storage order designated by the parameter when the values of the parameters P1 and P2 are not “0xFFFF”.

[4.2. Modification 2]
In the above-described embodiment and modification 1, one data object designated by the data acquisition command is transmitted to the external device 2, but the values of the parameters P1 and P2 are “0xFF00” (1111111100000000b), for example. When the data acquisition command is received, the application (the CPU 10 that executes the application) determines that all the object data having the same Tag value as the DATA tag value (from the object data stored at the time of issuing to the most recently stored object data) ) May be transmitted to the external device 2. In this case, when the external device 2 wants to acquire all the object data having a certain Tag value, these data objects can be acquired only by setting “0xFF00” in the parameters P1 and P of the data acquisition command. .. In this modification, the maximum storage number of object data having the same Tag value is 256 (the maximum number of additional records is 255).

1 IC card 1a IC chip 2 External device 10 CPU
11 RAM
12 ROM
13 nonvolatile memory 14 I/O circuit

Claims (7)

A data storage means for storing a plurality of data having the same T(Tag) value, which is TLV (Tag-Length-Value) format data;
For each of the data, storage order information indicating the order stored in the data storage means and linking information storing linking information linking the position information indicating the stored position for each T (Tag) value Means and
The acquisition command for acquiring the data stored in the data storage unit, the T(Tag) value of the data acquired by the acquisition command, and the order information indicating the order in which the data is stored in the data storage unit are external devices. When it is received from the external device, the data stored at the position indicated by the position information associated with the storage order information corresponding to the order information is referred to the external device by referring to the association information of the T(Tag) value. Transmitting means for transmitting,
An electronic information storage medium comprising: The electronic information storage medium according to claim 1, wherein
When the transmission means receives the T(Tag) value and the first predetermined information that is a substitute for the order information together with the acquisition command, referring to the linking information of the T(Tag) value, An electronic information storage medium, which transmits the most recently stored data to the external device. The electronic information storage medium according to claim 1 or 2,
When the transmission unit receives the T(Tag) value and the second predetermined information that is a substitute for the order information together with the acquisition command, the transmission unit has the same T(Tag) value as the T(Tag) value. An electronic information storage medium, which transmits all data to the external device. The electronic information storage medium according to any one of claims 1 to 3,
The data storage unit has a first storage area and a second storage area, and when storing object data, when the object data having the same Tag value as the Tag value of the object data is not stored yet. While storing in the first storage area, while storing object data having the same Tag value as the Tag value of the object data in the second storage area,
When the transmitting unit receives the T(Tag) value and the third predetermined information that is a substitute for the order information together with the acquisition command, the transmitting unit has the same T(Tag) value as the T(Tag) value. An electronic information storage medium, which is object data and transmits the object data stored in the first storage area to the external device. A data storage means for storing a plurality of data having the same T(Tag) value, which is TLV (Tag-Length-Value) format data;
For each of the data, storage order information indicating the order stored in the data storage means and linking information storing linking information linking the position information indicating the stored position for each T (Tag) value Means and
A method for transmitting data by a processor in an electronic information storage medium comprising:
The acquisition command for acquiring the data stored in the data storage unit, the T(Tag) value of the data acquired by the acquisition command, and the order information indicating the order in which the data is stored in the data storage unit are external devices. When it is received from the external device, the data stored at the position indicated by the position information associated with the storage order information corresponding to the order information is referred to the external device by referring to the association information of the T(Tag) value. Send step to send,
A method for transmitting data, comprising: A data storage means for storing a plurality of data having the same T(Tag) value, which is TLV (Tag-Length-Value) format data;
For each of the data, storage order information indicating the order stored in the data storage means and linking information storing linking information linking the position information indicating the stored position for each T (Tag) value Means and
The acquisition command for acquiring the data stored in the data storage unit, the T(Tag) value of the data acquired by the acquisition command, and the order information indicating the order in which the data is stored in the data storage unit are external devices. When it is received from the external device, the data stored at the position indicated by the position information associated with the storage order information corresponding to the order information is referred to the external device by referring to the association information of the T(Tag) value. Transmitting means for transmitting,
An IC card comprising: Data in TLV (Tag-Length-Value) format, which stores a plurality of data having the same T(Tag) value;
For each of the data, storage order information indicating the order stored in the data storage means and linking information storing linking information linking the position information indicating the stored position for each T (Tag) value Means and
A processor in an electronic information storage medium comprising
The acquisition command for acquiring the data stored in the data storage unit, the T(Tag) value of the data acquired by the acquisition command, and the order information indicating the order in which the data is stored in the data storage unit are external devices. When it is received from the external device, the data stored at the position indicated by the position information associated with the storage order information corresponding to the order information is referred to the external device by referring to the association information of the T(Tag) value. Sending means to send,
A data transmission program characterized by causing it to function as.

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