Content of num-patches1.xq example

import module namespace geo = "http://expath.org/ns/geo";
declare namespace gml="http://www.opengis.net/gml";

geo:num-patches(<gml:Surface><gml:patches>
                <gml:PolygonPatch><gml:exterior>
                    <gml:LinearRing><gml:posList>1 1 2 1 2 2 1 2 1 1</gml:posList></gml:LinearRing>
                </gml:exterior></gml:PolygonPatch>
                <gml:PolygonPatch><gml:exterior>
                    <gml:LinearRing><gml:posList>2 1 3 1 3 3 2 3 2 1</gml:posList></gml:LinearRing>
                </gml:exterior></gml:PolygonPatch>
              </gml:patches></gml:Surface>)