i felt this topic might be best homed here in the notation forum, since the principle generally relates to scoring ...
some of you might have heard about MusicXMLTM already and the concept behind is nothing one could avoid to touch over the next years (IMO) ... more hopefully not too many vendors will try to develop their own dialect, but fortunately the nature of XML allows advanced translation rules using XSLT
unfortunately the term VXML has already beeen taken by telekom companies and is a W3C standard, otherwise i'd encourage everyone to work on a common basis for VSL articulations 😉
christian
and remember: only a CRAY can run an endless loop in just three seconds.