* <li>{@link #tagFieldNames} - Tag field names.
 * <li>{@link #roleFieldName} - Role field name.
 * <li>{@link #langFieldName} - Language field name.
 * <li>{@link #badWords} - List of bad words.
 * <li>{@link #parallel} - Flag for parallel processing.
 * <li>{@link #readingConverter} - Reading converter.
 * <li>{@link #contentsReadingConverter} - Contents reading converter.
 * <li>{@link #normalizer} - Normalizer.

        /** Language field name key. */
        public static final String LANG_FIELD_NAME = "langFieldName";
        /** Parallel processing key. */
        public static final String PARALLEL_PROCESSING = "parallel";
        /** Max content length key. */
        public static final String MAX_CONTENT_LENGTH = "maxContextLength";

        private DefaultKeys() {
        }
    }

  <mime-type type="multipart/example"/>
  <mime-type type="multipart/form-data"/>
  <mime-type type="multipart/header-set"/>
  <mime-type type="multipart/mixed"/>
  <mime-type type="multipart/parallel"/>
  <mime-type type="multipart/report"/>
  <mime-type type="multipart/signed"/>
  <mime-type type="multipart/voice-message"/>

  <mime-type type="application/dif+xml">
    <root-XML localName="DIF"/>