Pset_ZoneCommonDefinition from IAI: Properties common to the definition of all occurrences of IfcZone.IfcZone entity.IfcZoneReferenceReference ID for this specified type in this project (e.g. type 'A-1')CategoryCategory of space usage or utilization of the area. It is defined according to the presiding national building code.GrossAreaPlannedTotal planned gross area for the space. Used for programming the space.NetAreaPlannedTotal planned net area for the space. Used for programming the space.PubliclyAccessibleIndication whether this space (in case of e.g., a toilet) is designed to serve as a publicly accessible space, e.g., for a public toilet (TRUE) or not (FALSE). HandicapAccessibleIndication whether this space (in case of e.g., a toilet) is designed to serve as an accessible space for handicapped people, e.g., for a public toilet (TRUE) or not (FALSE). This information is often used to declare the need for access for the disabled and for special design requirements of this space.