メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.0875000 33.0291667, 133.0937500 33.0291667, 133.0937500 33.0333333, 133.0875000 33.0333333, 133.0875000 33.0291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral