<gml:GridFunction xmlns:gml="http://www.opengis.net/gml/3.2">
  <gml:sequenceRule axisOrder="">{0,1}</gml:sequenceRule>
  <gml:startPoint>{0,1}</gml:startPoint>
</gml:GridFunction>

<element name="GridFunction" type="gml:GridFunctionType" substitutionGroup="gml:AbstractObject">
  <annotation>
    <documentation>gml:GridFunction provides an explicit mapping rule for grid geometries, i.e. the domain shall be a geometry of type grid. It describes the mapping of grid posts (discrete point grid coverage) or grid cells (discrete surface coverage) to the values in the range set. The gml:startPoint is the index position of a point in the grid that is mapped to the first point in the range set (this is also the index position of the first grid post). If the gml:startPoint property is omitted the gml:startPoint is assumed to be equal to the value of gml:low in the gml:Grid geometry. Subsequent points in the mapping are determined by the value of the gml:sequenceRule.</documentation>
  </annotation>
</element>