メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.3250000 34.7250000, 134.3312500 34.7250000, 134.3312500 34.7291667, 134.3250000 34.7291667, 134.3250000 34.7250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral