メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.770438739083 35.4353877961658, 136.770122927395 35.4353245196432, 136.769871235868 35.435318912312, 136.769764647165 35.4344643418969, 136.770437576945 35.4344302279783, 136.770438739083 35.4353877961658)) ^^http://www.opengis.net/ont/geosparql#wktLiteral