メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.2312500 34.8333333, 135.2375000 34.8333333, 135.2375000 34.8375000, 135.2312500 34.8375000, 135.2312500 34.8333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral