Something from the other side: A business process description and a set of messaging standards.
HL7 v2 in community.
http://www.ithealthboard.health.nz/sites/all/files/10030.1%2BEPharmaceutical%2BBusiness%2BProcess%2BStandard%2Bv1.pdf
http://www.ithealthboard.health.nz/sites/all/files/10030.2%2BEPharmaceutical%2BMessaging%2BStandard%2Bv1.pdf