メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.3750000 34.3541667, 135.3812500 34.3541667, 135.3812500 34.3583333, 135.3750000 34.3583333, 135.3750000 34.3541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral