Suggestions for onentry/onexit tags

Hey there,

We are working on an SCXML-Editor. Between reading the draft and parsing
the scxml we noticed that onentry/onexit tags can occur 0 till inf times
for a state.

Would it not be better to have 0 or 1 occurrence?
That would avoid the question: How can I exit a state multiple times
without re-enterring before?
The code from each handler would then be concatenated.

Please note either way:
The final state 3.7.2 ( http://www.w3.org/TR/scxml/#final )
 considers one entry of onentry/onexit tags only.
While the schema does not:
http://www.w3.org/2011/04/SCXML/scxml-core-strict.xsd

Regards,

Andreas