メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.7125000 34.5333333, 135.7187500 34.5333333, 135.7187500 34.5375000, 135.7125000 34.5375000, 135.7125000 34.5333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral