> This is already supported in Saxon-JS:
>
>
http://www.saxonica.com/saxon-js/documentation/index.html#!ixsl-extension/ins
tructions/schedule-action
>
> But I'm not sure how this concept would fit into "normal" XSLT processing.
>

One can certainly see that the idea of sending off multiple HTTP requests and
processing each result as soon as it arrives would be equally applicable to
server-side processing, but some might see this as something best done in the
"framework" that controls and despatches XSLT transformations, rather than in
the stylesheeet itself.

Michael Kay
Saxonica