if(!categories.containsKey(uri)) {
categories.put(uri, new HashMap<String,String>()) ;
}
if(node!=null && node.isLiteral() ) {
Literal nameLiteral = node.asLiteral() ;
String language = nameLiteral.getLanguage() ;
String name = nameLiteral.getLexicalForm() ;
if(language == null) language = "en" ;
categories.get(uri).put(language, name) ;
if ( _VERBOSE ){System.out.println("Category '"+uri+"' has name '"+name+"' in language '"+language+"'"); }