wrong codingScheme for DICOM in eventCodeList

[lynnfel]

In codes.xml in the XDS Tools used for 2021 IHE Connectathons the codingScheme value for DICOM codes for eventCodeList is INCORRECT and has been for years! (The URI value of http://dicom.nema.org/resources/ontology/DCM for system is correct).

Per DICOM PS3.16 Table 8-1, the correct coding scheme for DICOM Controlled Terminology in DICOM PS3.16 Chapter D is 1.2.840.10008.2.16.4. And in FHIR, the equivalent system value for DICOM codes is http://dicom.nema.org/resources/ontology/DCM.

Note that the formatCode in codes.xml for KOS correctly uses codingScheme t 1.2.840.1008.2.6.1 since the code value comes from the OID Registry in PS3.3.6