Before you use Module for ISO_8583 to parse or create ISO_8583 messages, you need to generate the IS document type from the jPOS supported message configuration file for the supported ISO_8583 messages. The generated IS document types serve as input to the service that you use to create ISO_8583 messages.

In some cases you may need to customize the document types provided by the Module for ISO_8583 to meet your business requirements. For example, you may need to add an additional field to an existing field or define a new custom field. With Module for ISO_8583, you can customize the jPOS message configuration files for the ISO_8583 message definitions by making copies of the jPOS message configuration files provided with the module and modifying them as required, or by generating new jPOS message configuration files. These customized jPOS message configuration files represent the custom message configuration. For information about how to configure Module for ISO_8583 to use the custom jPOS message configuration files, see Generating Document Types.

Using Trading Networks, two trading partners can exchange messages that conform to a specific ISO_8583 message scheme. To use a specific ISO_8583 message scheme between two trading partners, you must generate the message scheme in Module for ISO_8583 and then associate the message scheme ID with the trading partner agreement that you use for the message exchange. For information about associating a message scheme ID with a trading partner agreement, see Associating a Trading Partner Agreement with a Scheme ID.