Validity Extent Qualifier validityTypeType extValidityType refinedValidityType refinedExtValidityType POSC 1.0 exact The validity area describes the exact area of validity. typical The validity area describes a typical area of validity. The actual extent may be different in some ways. minimum The validity area as described is the minimum area. The object may be valid outside the given extent. maximum The validity area as described is maximal, in that the actual extent of validity is contained in the described area. unlimited The extent of the validity is unconstrained. unknown It is not known what category the given validity area falls into.