メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.373572048288 43.775700887115, 142.372851738089 43.7758998547675, 142.372276371682 43.7748884614266, 142.372715047688 43.7746607000138, 142.372922589024 43.7745475611443, 142.373572048288 43.775700887115)) ^^http://www.opengis.net/ont/geosparql#wktLiteral