メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.1250000 32.1333333, 130.1312500 32.1333333, 130.1312500 32.1375000, 130.1250000 32.1375000, 130.1250000 32.1333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral