This is the ValueSet that contains all the codes in Questionnaire Form Behavior Conditions (http://hl7.org/fhir/uv/sdc/ValueSet/formBehaviorConditions) and Questionnaire Form Behavior Conditions (http://hl7.org/fhir/uv/sdc/ValueSet/formBehaviorConditions). E.g. what you have to deal with if you get resources containing codes in either of them