メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.2312500 33.9166667, 133.2375000 33.9166667, 133.2375000 33.9208334, 133.2312500 33.9208334, 133.2312500 33.9166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral