This is the ValueSet that contains all the codes in CDex Attachment Task Code Value Set (http://hl7.org/fhir/us/davinci-cdex/ValueSet/cdex-attachment-task-code) and PAS Task Codes (http://hl7.org/fhir/us/davinci-pas/ValueSet/PASTaskCodes). E.g. what you have to deal with if you get resources containing codes in either of them