This is the ValueSet that contains all the codes in x_ClinicalStatementObservationMood (http://terminology.hl7.org/ValueSet/v3-xClinicalStatementObservationMood) and x_ClinicalStatementObservationMood (http://terminology.hl7.org/ValueSet/v3-xClinicalStatementObservationMood). E.g. what you have to deal with if you get resources containing codes in either of them