The gml:axis property is an association role (ordered sequence) to thecoordinate system axes included in this coordinate system. The coordinate values in acoordinate tuple shall be recorded in the order in which the coordinate system axesassociations are recorded, whenever those coordinates use a coordinate reference system thatuses this coordinate system. The gml:AggregationAttributeGroup should be used to specifythat the axis objects are ordered.
<element name="axis" type="gml:CoordinateSystemAxisPropertyType"><annotation><documentation>The gml:axis property is an association role (ordered sequence) to the coordinate system axes included in this coordinate system. The coordinate values in a coordinate tuple shall be recorded in the order in which the coordinate system axes associations are recorded, whenever those coordinates use a coordinate reference system that uses this coordinate system. The gml:AggregationAttributeGroup should be used to specify that the axis objects are ordered.</documentation></annotation></element>