OASIS OpenC2 TC: GitHub repository used to propose and track changes to the OpenC2 Language Specification as new working draft level revisions are created and the associated CSDs mature
Section 3.4.1.11, Page 42: The 'MAC Address' target totally confuses me, since the Type is described as 'Binary (eui)'. The Binary type must be serialized as Base64url, but I don't think that's right for a MAC Address. Proper JSON serialization for a MAC Address would be something like: '8c:85:90:72:31:af', which is closer to 'Binary/x' in our spec, but not exactly. This format is usually described as a 'colon-hexadecimal' format, so we should use that (it is the 'canonical' format for MAC addresses).
LS-137 (https://lists.oasis-open.org/archives/openc2/201904/msg00038.html):