code: public void setForeignAttr(String attrUri, String attrLocalName, String attrRawName, String attrValue)
    {
      QName key = new QName(attrUri, attrLocalName);
      m_outputProperties.setProperty(key, attrValue);
    }
docs: Set a foreign property from the attribute value.
  @param newValue non-null reference to attribute value.