メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.08587671617 35.1387063660968, 136.085048780363 35.1382520855409, 136.085852505132 35.1372682054657, 136.086655969253 35.1377215832491, 136.08587671617 35.1387063660968)) ^^http://www.opengis.net/ont/geosparql#wktLiteral