Release 10.1A: OpenEdge Development:
Progress 4GL Reference

MUST-UNDERSTAND attribute

Indicates whether a SOAP-header-entryref object is mandatory (TRUE) or optional (FALSE) for the recipient to process.

Data type: LOGICAL

Access: Readable

Applies to: SOAP-header-entryref object handle

If the SOAP-header-entryref object does not contain a MUST-UNDERSTAND attribute, this attribute returns FALSE.