xml:space attribute declaration?

[Jason Harrop <jh...@bigpond.net.au>]

Hi. I specified in the external subset of my DTD that the root element
has attribute xml:space (default|preserve) 'default'. For good measure
I've also explicitly set the xml:space attribute on the root element of
the xml document to "default".

Xerces is happy with this, and strips whitespace as expected;  Xalan
(which i realise uses xsl:strip-space) when parsing the xml file says

	[Error] Attribute xml:space not found in element type myRootElement
	Parser error: Attribute "xml:space" must be declared for element type
"myRootElement".

What might i be doing wrong?

thanks

Jason