code: @Override
      public int doStartTag() throws JspException {
          try {
              XPathContext context = XalanUtil.getContext(this, pageContext);
              String result = select.execute(context, context.getCurrentNode(), null).str();
              EscapeXML.emit(result, escapeXml, pageContext.getOut());
  	    return SKIP_BODY;
          } catch (IOException ex) {
  	    throw new JspTagException(ex.toString(), ex);
          } catch (TransformerException e) {
              throw new JspTagException(e);
          }
      }
docs: applies XPath expression from 'select' and prints the result