メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.7625000 34.3166667, 132.7687500 34.3166667, 132.7687500 34.3208334, 132.7625000 34.3208334, 132.7625000 34.3166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral