Hi, there was an omission in v4.0 for the conformance on TargetExact that was missing. Since we don't know which comparative will be used i.e. TargetExact or TargetLower or TargetUpper we need to have at least one selected so we have M but since we don't know which one we've added O as that particular attribute may not the right one.
The conformance should test that at least one of these 3 options is present. Release 4.1 has been approved and the Open API table is being updated to reflect this change and a couple more changes.
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Johanne Mayer
MayerConsult Inc
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