@Override
        public String getNamespaceURI(final String prefix) {
            return getNamespaceForPrefix(prefix, doc);
        }

        private String getNamespaceForPrefix(final String prefix, final Node namespaceContext) {
            Node parent = namespaceContext;
            String namespace = null;

            if ("xml".equals(prefix)) {
                namespace = "http://www.w3.org/XML/1998/namespace";

        }
        return null;
    }

    /**
     * Preprocesses a URI to ensure it has the correct storage protocol prefix.
     * @param uri the URI to preprocess
     * @return the preprocessed URI with storage:// prefix
     * @throws CrawlerSystemException if the URI is empty
     */
    protected String preprocessUri(final String uri) {
        if (StringUtil.isEmpty(uri)) {

     * @param normalizer The normalizer.
     */
    public void setNormalizer(final Normalizer normalizer) {
        this.normalizer = normalizer;
    }

    /**
     * Sets the prefix match weight.
     * @param prefixMatchWeight The prefix match weight.
     */
    public void setPrefixMatchWeight(final float prefixMatchWeight) {
        this.prefixMatchWeight = prefixMatchWeight;
    }

    /**

     */
    public void setNumberOfReplicas(final int numberOfReplicas) {
        this.numberOfReplicas = numberOfReplicas;
    }

    /**
     * Sets the prefix length for generated document IDs.
     *
     * @param idPrefixLength The prefix length.
     */
    public void setIdPrefixLength(final int idPrefixLength) {
        this.idPrefixLength = idPrefixLength;
    }