code: public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
    {
    	Expression expr = ((ElemVariable)m_obj).getSelect().getExpression();
      XObject xobj = expr.execute(xctxt);
      xobj.allowDetachToRelease(false);
      return xobj;
    }
docs: For support of literal objects in xpaths.
  
  @param xctxt The XPath execution context.
  
  @return This object.
  
  @throws javax.xml.transform.TransformerException