direction.xsd 2002-03 Candidate Direction schema for GML 3.0 This schema defines "direction" element and type. SJDC - keyword now gml:StringOrRefType Direction property type derives from AbstractAssociationType to allow remote specification of direction. Direction expressed using angles. Both angles are modulo of 2π. This angle is always in an interval [0, 2π), i.e. [0-259] degrees. All GML elements are directly or indirectly derived from this abstract supertype to establish a hierarchy of GML types that may be distinguished from other XML types by their ancestry. This is simple, free string describing the direction.