When you read data from WebSphere MQ, you read data from messages in a WebSphere MQ message queue. An MQSeries source definition contains message header fields and a message data field. The message header fields contain information about the message. The message data field contains the actual message. The message data can be one or more rows of binary, flat file, COBOL, or XML data. The message data format determines the types of source definitions you need to use.

Use the following types of source definitions in a mapping: