This is the ValueSet that contains all the codes in Patient relationship type (http://hl7.org/fhir/ValueSet/relatedperson-relationshiptype) and Personal And Legal Relationship Role Type (http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.11.20.12.1). E.g. what you have to deal with if you get resources containing codes in either of them