		public Collection<Namespace> elements(Language language) {
			Collection<Namespace> result = new ArrayList<Namespace>();
			try {
				for(String fqn: _namespaces) {
				  result.add(namespace(fqn, language));
				}
			} catch (LookupException e) {
				e.printStackTrace();
			}
			return result;
		}

		public Collection<Namespace> elements(Language language) {
			Collection<Namespace> result = new ArrayList<Namespace>();
			try {
				for(String fqn: _namespaces) {
				  Util.addNonNull(namespace(fqn, language),result);
				}
			} catch (LookupException e) {
				e.printStackTrace();
			}
			return result;
		}
