メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0500000 34.2416667, 134.0562500 34.2416667, 134.0562500 34.2458334, 134.0500000 34.2458334, 134.0500000 34.2416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral