This creates and example AuditEvent with two valueSets. One assembles some DICOM codes. The other calls for pulling in a DICOM valueset.
ci-build - http://build.fhir.org/ig/JohnMoehrke/testDicom/branches/master/index.html
Added an extension of type oid, and a search parameter to search that oid. IG publisher does not appear to complain about this (while fhir core fails - HL7/fhir#3021)