package org.apache.commons.rdf;

public interface Literal extends Term {
	String getLexicalForm() ;

	IRI getDatatype() ;

    String getLanguage() ;
}

@@ -120,22 +120,32 @@
  ;%0A%0A    
+Optional%3C
 String
+%3E
  getLang
@@ -148,15 +148,18 @@
 Language
+Tag
 () ;%0A%7D%0A

Use Optional<> for Literal.getLanguageTag