It specify the type of the application from which IDOC’s are being used .The application may be material master or customer master and vendor master etc.
WE81 is Tcode for defining a message type.
Always IDOC type and Message type should be linked with each other.
WE82 is Tcode used to create a link between message type and IDOC
STEPS FOR IDOC AND MESSAGE TYPES
Define segment -------------------- WE31
Define IDOC Type -------------------- WE30
Define message type -------------------- WE81
Link Message type and IDOC type ------------ WE82
MASTER IDOC:
It is an internal table which consists of data to be sent from SX system to RX system.
Suppose we are sending 100 materials from SX to RX , then MASTER IDOC will be generated for each material . i.e. for 100 materials we get 100 MASTER IDOC’s.
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