* @author koichik
 */
public abstract class SchemaFactoryUtil {

    private static final Logger logger = Logger.getLogger(SchemaFactoryUtil.class);

    /**
     * W3C XML Schemaのための{@link SchemaFactory}を生成します。
     *
     * @return W3C XML Schemaのための{@link SchemaFactory}
     */
    public static SchemaFactory newW3cXmlSchemaFactory() {
        return newW3cXmlSchemaFactory(false);
    }

                    factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtil.EMPTY);
                    factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, StringUtil.EMPTY);
                    final DocumentBuilder builder = factory.newDocumentBuilder();
                    final Document document = builder.parse(is);

        if (!external) {
            try {
                factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
                factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, "");
            } catch (final Exception e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to set a property.", e);
                }
            }
        }
        try {

labels.popularWord=Beliebte Wörter
labels.ignoreFailureType=Ignorierte Fehlertypen
labels.lastAccessTime=Letzter Zugriff
labels.notificationTo=Benachrichtigung an
labels.num=Anzahl
labels.pn=Seitenzahl
labels.protocolScheme=Schema
labels.purgeByBots=Bereinige Aufrufe von Bots
labels.purgeSearchLogDay=Bereinige Suchprotokoll
labels.query=Anfrage
labels.queryId=Anfrage-ID
labels.rt=rt
labels.searchLog=Protokoll durchsuchen
labels.sort=Sortieren

     */
    public static Schema newW3cXmlSchema(final Source schema) {
        assertArgumentNotNull("schema", schema);
        return newSchema(SchemaFactoryUtil.newW3cXmlSchemaFactory(), schema);
    }

    /**
     * URLからW3C XML Schemaのための{@link Schema}を生成します。
     *
     * @param schema
     *            W3C XML SchemaのURL。{@literal null}であってはいけません
     * @return {@link Schema}
     */

            final SAXParser parser = factory.newSAXParser();
            parser.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtil.EMPTY);
            parser.setProperty(XMLConstants.ACCESS_EXTERNAL_SCHEMA, StringUtil.EMPTY);
            parser.parse(is, this);
        } catch (final Exception e) {
            throw new GsaConfigException("Failed to parse XML file.", e);
        }
    }

    @Override