confirm contact, status, experimental, publisher, copyright date, and publication date.
confirm version, approval dates, lastReviewDate
for each definitional resource (StructureDefinition/Profile, CodeSystem, ValueSet, ConceptMap, Questionnaire), provide a description, purpose, useContext
for StructureDefinitions/Profile, provide fhirVersion
confirm all the above values for the IG itself, set in ig.ini. Note, some of the IG values flow into the resource values.