メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.0500000 33.9541667, 133.0562500 33.9541667, 133.0562500 33.9583333, 133.0500000 33.9583333, 133.0500000 33.9541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral