These functions return the valid values that are allowed by the GEDCOM Specification.
val_languages()
val_sexes()
val_multimedia_formats()
val_pedigree_linkage_types()
val_source_media_types()
val_adoptive_parents()
val_roles()
val_attribute_types()
val_family_event_types()
val_individual_event_types()A character vector of valid values.