Generic (user defined) attributes may be used to represent attributes which are '''not covered explicitly by the CityGML schema'''. Generic attributes must be used with care; they shall only be used if there is no appropriate attribute available in the overall CityGML schema. Otherwise, problems concerning semantic interoperability may arise. Interoperability of generic attributes is '''reduced to attribute values''' which can only be interpreted semantically by additional information. | Generic (user defined) attributes may be used to represent attributes which are '''not covered explicitly by the CityGML schema'''. Generic attributes must be used with care; they shall only be used if there is no appropriate attribute available in the overall CityGML schema. Otherwise, problems concerning semantic interoperability may arise. Interoperability of generic attributes is '''reduced to attribute values''' which can only be interpreted semantically by additional information. |