> My understanding multiple extensions in use but same mimetype of
> "xproc+xml".

Sorry, I didn’t get it… Would you recommend the following mappings?

xpl=application/xproc+xml
xproc=application/xproc+xml


> Although I note the list has:
>
> xsl=text/xml
> xslt=application/xslt+xml

I have adopted most of the entries from existing mime type lists, so I
assume that various assignments could be updated. XSL seems to be a
tricky case [1,2]; I would be happy to change the current assignment
if someone reading this believes the current assignments are not the
best choices.


[1] http://www.dpawson.co.uk/xsl/sect2/mimetypes.html
[2] https://stackoverflow.com/questions/6715767/what-content-type-should-be-used-for-xmlxsl-presentation