メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.5375000 34.9750000, 134.5437500 34.9750000, 134.5437500 34.9791667, 134.5375000 34.9791667, 134.5375000 34.9750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral