@Override
    public String getValue(int index) {
        if (xmlIdValue == null) {
            return delegate.getValue(index);            
        } else {
            if (xmlIdIndex == index) {
                return xmlIdValue;
            } else {
                return delegate.getValue(index);
            }
        }
    }
@param index
@return
@see org.xml.sax.Attributes#getValue(int)
src/nu/validator/xml/IdnessChangingAttributesWrapper.java