code: public void writeAttribute(String prefix, String namespaceURI,
  			String localName, String value) throws XMLStreamException {
  		try {
  			this.exiAttributes.addAttribute(namespaceURI, localName, prefix,
  					value);
  		} catch (Exception e) {
  			throw new XMLStreamException(e.getLocalizedMessage(), e);
  		}
  	}
docs: /*
  Writes an attribute to the output stream
  
  (non-Javadoc)
  
  @see javax.xml.stream.XMLStreamWriter#writeAttribute(java.lang.String,
  java.lang.String, java.lang.String, java.lang.String)