Why is the default value for arg_separator.output '&'?

For documents to conform to the XHTML recommendation, ampersand characters much be encoded as &amp;. The documentation for PHP recognises this. The same applies to HTML (with some exceptions that the session code will never encounter), although the PHP documentation makes no mention of this. Given this, why is the default value of arg_separator.output '&' and not '&amp;'? -- David Dorward <http://blog.dorward.me.uk/> <http://dorward.me.uk/> Home is where the ~/.bashrc is