code: package it.unibz.inf.ontop.model.vocabulary;
  
  import org.apache.commons.rdf.api.IRI;
  import org.apache.commons.rdf.simple.SimpleRDF;
  
  public class XPathFunction {
  
      public static final String PREFIX = "http://www.w3.org/2005/xpath-functions#";
  
      public final static IRI CONCAT;
      public final static IRI UPPER_CASE;
      public final static IRI LOWER_CASE;
      public final static IRI STARTS_WITH;
      public static final IRI ENDS_WITH;
      public static final IRI CONTAINS;
      public static final IRI SUBSTRING;
      public static final IRI STRING_LENGTH;
      public static final IRI ENCODE_FOR_URI;
      public static final IRI REPLACE;
      public static final IRI SUBSTRING_BEFORE;
      public static final IRI SUBSTRING_AFTER;
      public static final IRI NOT;
      public static final IRI NUMERIC_ABS;
      public static final IRI NUMERIC_ROUND;
      public static final IRI NUMERIC_FLOOR;
      public static final IRI NUMERIC_CEIL;
      public static final IRI YEAR_FROM_DATETIME;
      public static final IRI MONTH_FROM_DATETIME;
      public static final IRI DAY_FROM_DATETIME;
      public static final IRI HOURS_FROM_DATETIME;
      public static final IRI MINUTES_FROM_DATETIME;
      public static final IRI SECONDS_FROM_DATETIME;
      public static final IRI TIMEZONE_FROM_DATETIME;
  
      static {
          org.apache.commons.rdf.api.RDF factory = new SimpleRDF();
          CONCAT = factory.createIRI(PREFIX + "concat");
          UPPER_CASE = factory.createIRI(PREFIX + "upper-case");
          LOWER_CASE = factory.createIRI(PREFIX + "lower-case");
          STARTS_WITH = factory.createIRI(PREFIX + "starts-with");
          ENDS_WITH = factory.createIRI(PREFIX + "ends-with");
          CONTAINS = factory.createIRI(PREFIX + "contains");
          SUBSTRING = factory.createIRI(PREFIX + "substring");
          STRING_LENGTH = factory.createIRI(PREFIX + "string-length");
          ENCODE_FOR_URI = factory.createIRI(PREFIX + "encode-for-uri");
          REPLACE = factory.createIRI(PREFIX + "replace");
          SUBSTRING_BEFORE = factory.createIRI(PREFIX + "substring-before");
          SUBSTRING_AFTER = factory.createIRI(PREFIX + "substring-after");
          NOT = factory.createIRI(PREFIX + "not");
          NUMERIC_ABS = factory.createIRI(PREFIX + "numeric-abs");
          NUMERIC_ROUND = factory.createIRI(PREFIX + "numeric-round");
          NUMERIC_FLOOR = factory.createIRI(PREFIX + "numeric-floor");
          NUMERIC_CEIL = factory.createIRI(PREFIX + "numeric-ceil");
          YEAR_FROM_DATETIME = factory.createIRI(PREFIX + "year-from-dateTime");
          MONTH_FROM_DATETIME = factory.createIRI(PREFIX + "month-from-dateTime");
          DAY_FROM_DATETIME = factory.createIRI(PREFIX + "day-from-dateTime");
          HOURS_FROM_DATETIME = factory.createIRI(PREFIX + "hours-from-dateTime");
          MINUTES_FROM_DATETIME = factory.createIRI(PREFIX + "minutes-from-dateTime");
          SECONDS_FROM_DATETIME = factory.createIRI(PREFIX + "seconds-from-dateTime");
          TIMEZONE_FROM_DATETIME = factory.createIRI(PREFIX + "timezone-from-dateTime");
      }
  }
  