code: @Override
      public boolean handleAttribute(DDParser parser, String nsURI, String localName, int index) throws ParseException {
          boolean result = false;
  
          if (nsURI != null) {
              return result;
          }
  
          if (CONTEXT_ROOT_ATTRIBUTE_NAME.equals(localName)) {
              this.contextRoot = parser.parseStringAttributeValue(index);
              result = true;
          }
  
          return result;
  
      }
docs: parse the context-root attribute defined in the element.