Injecting moment in SVG output

[Mathieu Demange]

Hello all,

I'm looking for a way to inject an event's moment (like what 
event-listener.ly produces) into its corresponding grob id property (so 
it'll appear in the SVG output).

I tried all kind of things but nothing works. I'd share all my attempts 
if needed but if someone thinks of something which would work, I'd be 
delighted.

Thanks in advance.

Cheers,

Mathieu

PS : sorry if this is double post. The first one was more than ten 
hours ago, can that be so long?