code: protected String getFeatureSymbolicName(Attributes attrs) {
          String output = null;
          if (attrs != null) {
              // get Subsystem-SymbolicName
              String value = attrs.getValue(HDR_SUB_SYM_NAME);
              if (value != null) {
                  String[] parts = value.split(";");
                  if (parts.length > 0) {
                      output = parts[0].trim();
                  }
              }
          }
          return output;
      }
docs: returns the feature symbolic name from Attribute object.