JPH09252328A - Data communication method and data communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To convert a data format of electronic data interchange (EDI) data received from other communication system into a data format of the EDI data in its own communication system. SOLUTION: Data format information registration means 11, 21 register respectively data format information of EDT data of its own communication system to a data format conversion information management system 3. When no conversion table exists in a conversion table storage means 25, a conversion table request means 26 requests a conversion table to the data format conversion information management system 3 and a conversion table transmission means 36 returns a conversion table stored in a conversion table storage means 33 or generated by a conversion table generating means 35. An EDI conversion means 28 uses the conversion table stored in the conversion table storage means 25 or returned to convert a data format of the EDI data into a data format in its own communication system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication method and a data communication system, and more particularly to a data communication method for performing data communication between communication systems having different data formats and a data communication system for implementing the method.

[0002]

2. Description of the Related Art In recent years, EDI (Electronic Data Int) is an electronic version of order slips used for transactions.
It has become common to conduct transactions by electronically exchanging data between communication systems (for example, Hiroshi Kitazawa “EDI”).
Introduction-Business Network Protocols- ", No. 1
2-19, Software Research Center, 19
See March 1991).

There is no problem if the data format of EDI data handled by each communication system is the same, but if the data format of EDI data in the communication system on the transmitting side and the data format of EDI data in the communication system on the receiving side are different. Since processing cannot be performed, it is necessary to convert the data format of EDI data. Conventionally, the following two methods have been considered when converting the data format.

The first method is to prepare a conversion table for converting the data format of the EDI data in the communication system on the transmitting side to the data format of the EDI data in the communication system on the receiving side in the communication system on the transmitting side for transmission. Convert the data format of the EDI data to be transmitted to the device into the data format of the EDI data in the communication system on the receiving side and output the data, or
This is a method of preparing a conversion table in the receiving communication system and converting the data format of the EDI data received in the receiving communication system into the data format of the EDI data in the own communication system.

The second method is that when transmitting EDI data, the data format of the EDI data to be transmitted is converted into the standard data format and then transmitted, and when receiving the EDI data, the standard format of the received EDI data is converted into its own communication system. This is a method of converting the EDI data into the data format in.

[0006]

The first problem in the above-mentioned conventional technique is that, when the above-mentioned first method is adopted, conversion processing is performed for each partner communication system that uses a different data format. Since the conversion table has to be created, it takes time and effort to create the conversion table, and the EDI in the other communication system is used.
It is necessary to recreate the conversion table every time the data format of the data is changed.

The second problem is that when the above-mentioned second method is adopted, each of the transmitting side communication system and the receiving side communication system must perform the conversion process of the data format of the EDI data once. , The data format conversion process must be performed twice on the EDI data, resulting in poor processing efficiency.

An object of the present invention is to provide a receiving communication system,
When the local communication system does not have a conversion table for converting the data format of the EDI data received from the transmitting communication system into the data format of the EDI data in the local communication system, a conversion table suitable for the data format conversion information management system is created. Convert the received data format of the EDI data to the data format of the EDI data in the own communication system by using a conversion table provided in the own communication system or an appropriate conversion table received from the data format conversion information management system. To provide a data communication method.

Another object of the present invention is to provide a data communication system for implementing the above data communication method.

[0010]

In the data communication method of the present invention, a transmitting side communication system and a receiving side communication system are provided.
The data format information of the EDI data in the own communication system is respectively registered in the data format conversion information management system, and the reception side communication system sets the data format of the EDI data received from the transmission side communication system to the EDI data of the own communication system. When the own communication system does not have a conversion table for converting to a data format, request the appropriate conversion table from the data format conversion information management system, and use the conversion table included in the own communication system or the data format conversion information management system. It is characterized in that the data format of the received EDI data is converted into the data format of the EDI data in the own communication system by using an appropriate conversion table to be received.

Further, the data communication system of the present invention includes a data format information registration means for registering the data format information of the EDI data in the communication system itself in the data format conversion information management system, and a receiving side by adding a header to the EDI data. A transmission side communication system including a message transmission means for transmitting to the communication system; a data format information registration means for registering data format information of EDI data in the own communication system into the data format conversion information management system;
Conversion table storage means for storing a conversion table for converting the data format of data to a different data format, and conversion to the data format conversion information management system when a conversion table required for this conversion table storage means is not stored The receiving side communication system comprising conversion table requesting means for requesting a table and EDI data converting means for converting the data format of the EDI data received from the transmitting side communication system into the data format of the EDI data in the own communication system; Using data format information storage means for storing data format information of EDI data in a communication system for transmitting and receiving EDI data, and data format information stored by this data format information storage means It has a conversion table generating means for generating a conversion table, and said data format conversion information management system and a conversion table storage means for storing a conversion table generated by the conversion table generating means.

Further, the data communication system of the present invention comprises:
Transmission side communication comprising data format registration means for registering data format information of EDI data in its own communication system in a data format conversion information management system, and message transmission means for adding a header to EDI data and transmitting it to the reception side communication system System, data format registration means for registering data format information of EDI data in its own communication system in the data format conversion information management system, message receiving means for receiving a message from the transmitting communication system, and this message receiving means Message separation means for separating the message received by the header into EDI data, and a conversion format for the data format conversion information management system based on the header separated by the message separation means. Conversion table requesting means for requesting a conversion table, conversion table receiving means for receiving the conversion table from the data format conversion information management system, and the message separating means for separating based on the conversion table received by the conversion table receiving means. E
A receiving side communication system including an EDI data converting means for converting the data format of the DI data from the data format of the EDI data in the transmitting side communication system to the data format of the EDI data in the own communication system, the transmitting side communication system and the above Data format information registration receiving means for receiving registration of data format information from the communication system on the receiving side, data format information storage means for storing the data format information registered by the data format information registration receiving means, and this data format A conversion table generating means for generating a conversion table for converting EDI data between different data formats using the data format information stored in the information storage means, and the conversion table generating means. Conversion table storage means for storing the conversion table generated by the table generation means, conversion table request reception means for receiving the conversion table request from the communication system on the receiving side, and conversion table request received by the conversion table request reception means. And a data format conversion information management system including a conversion table transmission unit that acquires the conversion table corresponding to the above from the conversion table storage unit and transmits the conversion table to the communication system on the receiving side.

Furthermore, the data communication system of the present invention includes a data format registration means for registering the data format information of the EDI data in the communication system itself in the data format conversion information management system, and a receiving side by adding a header to the EDI data. A transmitting side communication system comprising a message transmitting means for transmitting to the communication system,
Data format registration means for registering the data format information of EDI data in the own communication system to the data format conversion information management system, message receiving means for receiving a message from the transmitting communication system, and message receiving means for receiving the message. Message separation means for separating the message into a header and EDI data, a conversion table storage means for storing the conversion table, and a conversion table corresponding to the conversion table storage means based on the header separated by the message separation means. Conversion table requesting means for requesting a conversion table to the data format conversion information management system when the data is not stored, and a conversion table receiving means for receiving the conversion table from the data format conversion information management system. Means and, E in the self-communication system from the data format of the EDI data in the sending communication system the data format of the EDI data separated by said message separating means based on the conversion table received by the conversion table receiving means
A receiving side communication system comprising EDI data converting means for converting into a data format of DI data; a data format information registration receiving means for receiving registration of data format information from the transmitting side communication system and the receiving side communication system; Data format information storage means for storing the data format information registered by the data format information registration receiving means, and conversion of EDI data between different data formats using the data format information stored in the data format information storage means Conversion table generating means for generating a conversion table for storing the conversion table, conversion table storing means for storing the conversion table generated by the conversion table generating means, and a conversion table request from the receiving side communication system. Conversion table request receiving means, and conversion table transmitting means for acquiring the conversion table corresponding to the conversion table request received by the conversion table request receiving means from the conversion table storage means and transmitting it to the receiving side communication system. And a data format conversion information management system including.

[0014]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a data communication system to which a data communication method according to an embodiment of the present invention is applied. This data communication system includes a transmission side communication system 1, a reception side communication system 2, a data format conversion information management system 3, and a line 4, a line 5 and a line 6 for connecting the respective systems. It is configured.

Here, the communication system 1 on the transmission side and the communication system 2 on the reception side transmit and receive a message containing EDI data, and the data format of the EDI data handled by each is the data format F1 and the data format F2, respectively. And

The transmission side communication system 1 uses the data format information (see FIG. 2) of the EDI data in its own communication system.
Data format information registration means 11 for registering the reference format) in the data format conversion information management system 3, and an ED
Message transmitting means 1 for transmitting a message in which a header is added to I data (see FIG. 6) to the communication system 2 on the receiving side.
2 is provided.

The receiving communication system 2 has data format information (see FIG. 3) of EDI data in its own communication system.
Data) to the data format conversion information management system 3, data format information registration means 21, message reception means 22 for receiving a message (see FIG. 6) from the transmission side communication system 1, and the received message for the header and EDI. Message separation means 23 for separating the data and data, EDI data temporary storage means 24 for temporarily storing the EDI data separated from the message, conversion table storage means 25 for storing the conversion table, and data format conversion information management system 3, a conversion table requesting means 26 for requesting a conversion table, a conversion table receiving means 27 for receiving the conversion table from the data format conversion information management system 3, and a data format of the EDI data for the EDI data in the transmission side communication system 1. Fo And a EDI data converting means 28 for converting the data format of the EDI data in its own communication system from the mat.

The data format conversion information management system 3 includes a data format information registration accepting means 31 for accepting registration of data format information from the transmission side communication system 1 and the reception side communication system 2, and data format information for storing the data format information. ED from the storage means 34 and the stored data format information
Conversion table generating means 35 for generating a conversion table for converting I data between different data formats.
And a conversion table storage means 33 for storing the conversion table.
And a conversion table request receiving means 32 for receiving a conversion table request from the reception side communication system 2, and a conversion table transmission means 36 for transmitting the requested conversion table to the reception side communication system 2.

Referring to FIG. 2, the transmitting communication system 1
The data format information of the EDI data is stored in such a manner that each control code and each data identifier of the data format F1 are stored so as to correspond to each control code and each data identifier of the standard data format Fs. In some cases, the standard data format Fs does not have a data identifier corresponding to the data format F1.

Referring to FIG. 3, the receiving communication system 2
The data format information of the EDI data in is stored in such a manner that the control codes and the data identifiers of the data format F2 are stored corresponding to the control codes and the data identifiers of the standard data format Fs. In some cases, the standard data format Fs does not have a data identifier corresponding to the data format F2.

Referring to FIG. 4, the transmission side communication system 1
The conversion table for converting the data format between the data format F1 of the EDI data in and the data format F2 of the EDI data in the receiving communication system 2 corresponds to each control code and each data identifier of the standard data format Fs. The control codes and data identifiers of the data format F1 and the control codes and data identifiers of the data format F2 are stored so as to be compared with each other.

Referring to FIG. 5, one example of EDI data is configured by sandwiching a plurality of data segments including a data identifier, a control code, contents, and a control code between a control code at the beginning and a control code at the end. ing.

Referring to FIG. 6, the transmission side communication system 1
The message sent from the receiving side communication system 2 to the receiving side communication system 2 is the identifier of the transmitting side communication system 1 (hereinafter referred to as the transmitting system ID
And the identifier of the communication system 2 on the receiving side (hereinafter,
(Abbreviated as receiving system ID), transmitting side communication system 1
Of the EDI data, the header including the data format version information (data format name F1 and version number) and the like, and the EDI data in which the header is added to the head side.

Referring to FIG. 7A, the registration processing of the data format information of the transmission side communication system 1 comprises a data format information transmitting step S101. Further, referring to FIG. 7B, the communication process of the EDI data of the transmitting communication system 1 is performed by the message transmitting step S.
And 111.

Referring to FIG. 8A, the registration processing of the data format information of the receiving side communication system 2 includes a data format information transmitting step S201. Further, referring to FIG. 8B, the communication processing of the EDI data of the reception side communication system 1 is performed by the message receiving step S.
211, message separation and EDI data storage step S212, and conversion table presence / absence determination step S21
3, a conversion table requesting step S214, a conversion table receiving and storing step S215, and an EDI data converting step S216.

Referring to FIG. 9A, the data format information registration process of the data format conversion information management system 3 includes a data format information receiving and storing step S301. Further, referring to FIG. 9B, the processing of the data format conversion information management system 3 at the time of receiving the conversion table request includes a conversion table request reception step S311 and a conversion table presence / absence determination step S3.
312 and data format information selection step S31
3 and conversion table generation and storage step S314
And a conversion table transmission step 315.

Next, the data communication method according to the present embodiment configured as described above will be described with reference to FIGS. 1 to 9 together with the operation of the data communication system.

The data communication system according to the present embodiment is roughly divided into two processes, a data format information registration process and an EDI data communication process.

First, the process of registering the data format information will be described.

The data format registration means 11 in the transmission side communication system 1 receives the data format information from a user terminal, a program in the transmission side communication system 1, etc., and instructs the transmission. Is transmitted to the data format conversion information management system 3 via the line 4 together with the transmission system ID and the data format version information (data format name F1 and version number) (step S101).

Upon receiving the data format information from the transmission side communication system 1, the data format information registration acceptance means 31 in the data format conversion information management system 3 sends the data format information together with the transmission system ID and the data format version information. Stored in the storage means 34 (step S30)
1).

The data format registration means 21 in the receiving side communication system 2 receives the data format information from a user terminal or a program in the receiving side communication system 2 and instructs the data to be transmitted. Receive format information Version information of system ID and data format information (data format name F
2 and the version number) and transmitted to the data format conversion information management system 3 via the line 5 (step S2).
01).

Upon receiving the data format information from the receiving communication system 2, the data format information registration receiving means 31 in the data format conversion information management system 3 receives the data format information together with the transmission system ID and the data format version information. Stored in the storage means 34 (step S30)
1).

With the above, the registration process of the data format information is completed.

Next, the EDI data communication process will be described. Here, it is assumed that the above-described data format information registration processing is performed prior to this processing.

The message transmitting means 12 in the transmission side communication system 1 is, for example, a user terminal or the transmission side communication system 1
When EDI data is input from a program or the like in the program and transmission is instructed, a message is created by adding a header containing the transmission system ID, the reception system ID, the data format version information, etc. to the EDI data, and the line 6 is used. It transmits to the receiving side communication system 2 (step S111).

When a message is sent from the transmitting side communication system 1 via the line 6, the receiving side communication system 2
The message receiving means 22 receives the message (step S211).

Next, the message separating means 23 separates the message received by the message receiving means 22 into a header and EDI data, stores the EDI data in the EDI data temporary storage means 24, and stores the header in the conversion table storage means. 25 (step S212).

The conversion table storage means 25 stores the transmission system ID in the header passed from the message separation means 23.
And E received based on the data format version information
It is determined whether or not a conversion table for converting DI data is stored (step S213). If the conversion table is stored, the corresponding conversion table is passed to the EDI data conversion means 28, and if not stored, the transmission system ID is stored. And the data format version information is passed to the conversion table requesting means 26. When a plurality of conversion tables having the same transmission system ID are stored, the conversion table storage unit 25 sets the conversion table with the latest data format version information as the corresponding conversion table.

Upon receiving the transmission system ID and the data format version information from the conversion table storage means 25, the conversion table requesting means 26 sends the transmission system ID and the data format version information and the I of the own communication system.
A conversion table request including D (transmission system ID) and data format version information is created and transmitted to the data format conversion information management system 3 via the line 5 (step S214).

When a conversion table request is transmitted from the receiving communication system 2 via the line 5, the conversion table request receiving means 32 in the data format conversion information management system 3 receives this (step S311).

The conversion table request receiving means 32 passes the transmission system ID and data format version information and the transmission system ID and data format version information included in the received conversion table request to the conversion table storage means 33.

The conversion table storage means 33 stores the transmission system ID and the data format version information and the transmission system ID passed from the conversion table request reception means 32.
Then, it is determined whether or not the conversion table indicated by the data format version information is stored (step S312).
When the corresponding conversion table is stored, the conversion table storage means 33 passes the conversion table to the conversion table transmission means 36, and when the conversion table is not stored, it is passed from the conversion table request reception means 32. The transmission system ID and data format version information and the transmission system ID and data format version information are passed to the data format information storage means 34.

The data format information storage means 34 is
Transmission system I passed from conversion table storage means 33
D and the data format version information, and the transmission system ID) and the data format version information, the data format information of the EDI data in the transmission side communication system 1 and the ED in the reception side communication system 2
The data format information of the I data is selected and passed to the conversion table generating means 35 (step S313).

The conversion table generation means 35 performs data conversion based on the data format information of the EDI data in the transmission side communication system 1 and the data format information of the EDI data in the reception side communication system 2 passed from the data format information storage means 33. Format F1
A conversion table from the data format to the data format F2 is generated and stored in the conversion table storage means 33 (step S
314).

The conversion table transmitting means 36 transmits the corresponding conversion table previously stored in the conversion table storage means 33 or the corresponding conversion table newly stored in the conversion table storage means 33 to the transmission system ID and the data format version. The information and the transmission system ID and data format version information are transmitted to the reception side communication system 2 via the line 5 (step S31).
5).

When the conversion table is transmitted from the data format conversion information management system 3 via the line 5, the conversion table receiving means 2 in the communication system 2 on the receiving side is transmitted.
7 receives this and stores it in the conversion table storage means 25 together with the transmission system ID and the data format version information (step S215).

The EDI data conversion means 28 uses the corresponding conversion table previously stored in the conversion table storage means 25 or the corresponding conversion table newly stored in the conversion table storage means 25 to temporarily store the EDI data. The data format of the EDI data temporarily stored in 24 is converted from the data format F1 to the data format F2 (step S21).
6).

As described above, the EDI data communication processing in the data communication system according to the present embodiment is completed.

By the way, in the above embodiment, the conversion table storage means 25 stores the conversion table in the communication system 2 on the receiving side. However, as in the modification shown in FIG. Instead of providing the conversion table storage means 25, the reception side communication system 2 may request the conversion table from the data format conversion information management system 3 every time a message is received. In this case, the data format conversion information management system 3 can always be synchronized with the latest data format, and there is an advantage that the conversion method is unified.

In the above embodiment, one transmitting communication system 1 and one receiving communication system 2 are shown, but it goes without saying that there may be a plurality of each. In addition, the transmission side communication system 1
It goes without saying that the communication system 2 on the receiving side and the communication system 2 on the receiving side may exchange the roles of transmission and reception with each other.

[0053]

As described above, in the data communication method and data communication system of the present invention, the first effect is that the EDI data is transmitted in either the transmitting communication system or the receiving communication system shown in the prior art. The versatility is higher than when converting the data format. This is because the data format conversion information management system generates the conversion table, and thus it is not necessary to create the conversion table according to the partner communication system in the communication system that communicates EDI data.

The second effect is that the data format F1 shown in the prior art → standard data format Fs →
This is more efficient than the case of converting the data format of EDI data like the data format F2. This is because the conversion process for EDI data only needs to be done once, and if there is no suitable conversion table in either the communication system on the receiving side or the data format conversion information management system, it is necessary to newly generate a conversion table. Even if the processing is taken into consideration, the processing efficiency can be sufficiently high when the amount of EDI data is large.

The third effect is that it is not always necessary to store the conversion table in the communication system on the receiving side. If the conversion table is not stored in the communication system on the receiving side, the data format conversion information management system can be synchronized with the latest data format, and the conversion method can be unified. However, it is also possible to save the conversion table having a high utilization rate in the communication system on the receiving side and reduce the access to the data format conversion information management system, thereby improving the efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a data communication system to which a data communication method according to an embodiment of the present invention is applied.

FIG. 2 is a diagram showing data format information of EDI data in the transmission side communication system in FIG.

FIG. 3 is a diagram showing data format information of EDI data in the communication system on the receiving side in FIG.

4 is a diagram showing a conversion table stored in the data format conversion information management system in FIG.

5 is a diagram showing an example of EDI data transmitted from the transmission side communication system in FIG. 1 to the reception side communication system.

6 is a diagram showing a message sent from the transmission side communication system in FIG. 1 to the reception side communication system.

7A and 7B are flowcharts showing a process of the transmission side communication system in FIG. 1, wherein FIG. 7A shows a data format information registration process, and FIG. 7B shows an EDI data communication process.

8A and 8B are flowcharts showing a process of the receiving side communication system in FIG. 1, in which FIG. 8A shows a data format information registration process, and FIG. 8B shows an EDI data communication process.

9A and 9B are flowcharts showing the processing of the data format conversion information management system in FIG. 1, in which FIG. 9A shows the processing of registering the data format information, and FIG. 9B shows the processing when the conversion table request is received.

FIG. 10 is a block diagram showing a modified example of the data communication system according to the exemplary embodiment shown in FIG.

[Explanation of symbols]

 1 Communication system on communication side 2 Communication system on reception side 3 Data format conversion information management system 11 Data format information registration means 12 Message transmission means 21 Data format information registration means 22 Message reception means 23 Message separation means 24 EDI data temporary storage means 25 Conversion table Storage means 26 Conversion table request means 27 Conversion table reception means 31 Data format information registration reception means 32 Conversion table request reception means 33 Conversion table storage means 34 Data format information storage means 35 Conversion table generation means 36 Conversion table transmission means

Claims (5)

[Claims] 1. A transmission side communication system and a reception side communication system respectively register data format information of EDI data in its own communication system in a data format conversion information management system, and the reception side communication system is the transmission side communication system. If the own communication system does not have a conversion table for converting the data format of the EDI data received from the data format of the EDI data in the own communication system, request the data format conversion information management system for an appropriate conversion table, Using a conversion table provided in the own communication system or an appropriate conversion table received from the data format conversion information management system,
A data communication method, characterized in that a data format of received EDI data is converted into a data format of EDI data in a local communication system. 2. A data format information registering means for registering data format information of EDI data in the own communication system to a data format conversion information management system, and a message transmitting means for adding a header to the EDI data and transmitting it to the receiving side communication system. And a data format information registration means for registering the data format information of EDI data in the own communication system in the data format conversion information management system, and ED
A conversion table storage means for storing a conversion table for converting the data format of the I data into a different data format, and the data format conversion information management system when the conversion table required for the conversion table storage means is not stored. A receiving side communication system comprising conversion table requesting means for requesting a conversion table and EDI data converting means for converting the data format of the EDI data received from the transmitting side communication system into the data format of the EDI data in the own communication system; , ED in a communication system for sending and receiving EDI data
Data format information storage means for storing data format information of I data, conversion table generation means for generating a conversion table using the data format information stored by the data format information storage means, and conversion table generation means. And a data format conversion information management system including conversion table storage means for storing the converted conversion table. 3. A data format registration means for registering data format information of EDI data in a local communication system to a data format conversion information management system, and a message transmission means for adding a header to the EDI data and transmitting it to the communication system on the receiving side. A transmission side communication system comprising: a data format registration means for registering data format information of EDI data in the communication system to the data format conversion information management system; and a message reception means for receiving a message from the transmission side communication system. A message separating means for separating the message received by the message receiving means into a header and EDI data, and the data format conversion information management system based on the header separated by the message separating means. Table requesting means for requesting a conversion table to the system, a conversion table receiving means for receiving the conversion table from the data format conversion information management system, and the message separating means based on the conversion table received by the conversion table receiving means. A communication system on the receiving side, which comprises an EDI data converting means for converting the data format of the EDI data separated by the data format of the EDI data in the communication system on the transmitting side into the data format of the EDI data in the communication system on its own; Data format information registration accepting means for accepting registration of data format information from the communication system and the receiving communication system, and data accepted by the data format information registration accepting means Data format information storage means for storing the format information, and conversion table generation means for generating a conversion table for converting EDI data between different data formats using the data format information stored in the data format information storage means. A conversion table storage means for storing the conversion table generated by the conversion table generation means, a conversion table request receiving means for receiving a conversion table request from the communication system on the receiving side, and a conversion table request receiving means for receiving the conversion table request. A data format conversion information management system including a conversion table transmitting unit that acquires a conversion table corresponding to a conversion table request from the conversion table storage unit and transmits the conversion table to the reception side communication system. system. 4. A data format registration means for registering data format information of EDI data in a local communication system to a data format conversion information management system, and a message transmission means for adding a header to EDI data and transmitting it to a communication system on the receiving side. A transmission side communication system comprising: a data format registration means for registering data format information of EDI data in the communication system to the data format conversion information management system; and a message reception means for receiving a message from the transmission side communication system. A message separating means for separating the message received by the message receiving means into a header and EDI data; a conversion table storing means for storing the conversion table; and a message separating means for separating the message received by the message separating means. Conversion table requesting means for requesting the conversion table to the data format conversion information management system when the conversion table corresponding to the conversion table storage means is not stored, and conversion from the data format conversion information management system A conversion table receiving means for receiving the table and a data format of the EDI data separated by the message separating means based on the conversion table received by the conversion table receiving means from the data format of the EDI data in the transmission side communication system. E in own communication system
A receiving side communication system including EDI data converting means for converting into a data format of DI data; a data format information registration receiving means for receiving registration of data format information from the transmitting side communication system and the receiving side communication system; Data format information storage means for storing the data format information registered by the data format information registration receiving means, and conversion of EDI data between different data formats using the data format information stored in the data format information storage means Conversion table generating means for generating a conversion table for storing the conversion table, conversion table storing means for storing the conversion table generated by the conversion table generating means, and a conversion table request from the receiving side communication system. A conversion table request receiving unit that receives the conversion table request, and a conversion table transmitting unit that acquires the conversion table corresponding to the conversion table request received by the conversion table request receiving unit from the conversion table storage unit and transmits the conversion table to the reception side communication system. A data communication system comprising: a data format conversion information management system provided. 5. The data communication system according to claim 2, wherein the header includes a transmission system ID, a reception system ID, and data format version information.