メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.198362404831 34.6927900981464, 135.197600795558 34.6924957695462, 135.197997480674 34.6918100828422, 135.198753933805 34.6921337436983, 135.198488524463 34.6925863692895, 135.198362404831 34.6927900981464)) ^^http://www.opengis.net/ont/geosparql#wktLiteral