The Default message definition is used to process every incoming message and extract the desired fields from the MSH segment. If you look at this message you will note that:

• The table grammar is blank;
• The segment grammar has only a single MSH segment; and
• Segment filtering has been switched on.

This means that no data is mapped out of the message; only the MSH segment will be parsed and any other segments will be ignored.

	To learn more about default messages, see Specifying Default Messages.