code: public int getTargetDocumentType()
      {
          if (_rendering != TagRenderingBase.UNKNOWN_RENDERING)
              return _rendering;
  
          if (_docType != null) {
              if (_docType.equals(HTML_401))
                  _rendering = TagRenderingBase.HTML_RENDERING;
              else if (_docType.equals(HTML_401_QUIRKS))
                  _rendering = TagRenderingBase.HTML_RENDERING_QUIRKS;
              else if (_docType.equals(XHTML_10))
                  _rendering = TagRenderingBase.XHTML_RENDERING;
              else
                  _rendering = TagRenderingBase.getDefaultDocType();
          }
          else {
              _rendering = TagRenderingBase.getDefaultDocType();
          }
          return _rendering;
      }
docs: This method will return the TagRenderBase enum value for the document type.  The default
  value is HTML 4.01.
  @return int