メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.0250000 34.1541667, 133.0312500 34.1541667, 133.0312500 34.1583333, 133.0250000 34.1583333, 133.0250000 34.1541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral