Re: Preserving inline DTD

It would be helpful if xsl:output had some option to copy the DOCTYPE
declaration of the input document, but that might be wishful
thinking.

It can not copy information that it doesn't have. The DTD goes along
with white space inside tags and whether " or ' is used to delimit
attribute values. <xsl:copy-of on

<!DOCTYPE x []>
<x
foo =
'bar'

</x>