Re: Appending to existing file

According to the spec, you're not allowed to execute two xsl:result-document
instructions using the same URI. This is because of the theory that
everything in XSLT is done in an undefined order, perhaps even in parallel.

However, there's nothing that stops you writing to different URIs and then
capturing the output and sending it all to the same file. In the Saxon API
you can set an OutputURIResolver, and it's this that determines where the
data ends up. There's nothing to stop you for example writing to URIs
file:///c:/temp.xml#1, file:///c:/temp.xml#2 and so on, and having all the
data end up in c:/temp.xml.