code: package it.unibz.inf.ontop.model.vocabulary;
  
  import org.apache.commons.rdf.api.IRI;
  import org.apache.commons.rdf.simple.SimpleRDF;
  
  public class UOM {
      public static final String PREFIX = "http://www.opengis.net/def/uom/OGC/1.0/";
      public static final IRI METRE;
      public static final IRI DEGREE;
      public static final IRI RADIAN;
  
      static {
          org.apache.commons.rdf.api.RDF factory = new SimpleRDF();
          METRE = factory.createIRI(UOM.PREFIX + "metre");
          DEGREE = factory.createIRI(UOM.PREFIX + "degree");
          RADIAN = factory.createIRI(UOM.PREFIX + "radian");
      }
  
  }
  