This is the ValueSet that contains all the codes in ANS1ToHL7 codes defined for Boolean Clock attributes (http://hl7.org/fhir/uv/phd/ValueSet/ASN1ClockBits) and ANS1ToHL7 codes defined for Boolean Clock attributes (http://hl7.org/fhir/uv/phd/ValueSet/ASN1ClockBits). E.g. what you have to deal with if you get resources containing codes in either of them