OptionalaggregatedFacilities (e.g. buildings) in Twin
OptionalaggregatedSites are part of this site
OptionalaggregatedSpaces that are not part of any facility
OptionalclassType of site (i.e. IfcSite)
OptionalelementOptionalidUnique identifier for the site
Name of the site
OptionalpropertySets of properties describing the Twin (e.g. AreaType = Residential)
A site is a defined area of land, possibly covered with water, upon which constructions are located