メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.6875000 34.9916667, 133.6937500 34.9916667, 133.6937500 34.9958334, 133.6875000 34.9958334, 133.6875000 34.9916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral