code: public void setSelect(XPath v)
    {
  
      if (null != v)
      {
        String s = v.getPatternString();
  
        m_isDot = (null != s) && s.equals(".");
      }
  
      m_selectExpression = v;
    }
docs: Set the "select" attribute.
  The required select attribute is an expression; this expression
  is evaluated and the resulting object is converted to a
  string as if by a call to the string function.
  
  @param v The value to set for the "select" attribute.