ISO/TS 10303-1265:2004 specifies the application module for Envelope.
The following are within the scope of ISO/TS 10303-1265:2004:
identification of the sender of the envelope and date sent;
identification of the recipient of the envelope and date received;
authorisation of the sending of the message;
solicitation of a receipt for the envelope and acknowledge it;
association of envelopes to each other;
association of properties to the envelope.