Hi Michael.

@You : "...The tricky part about adding things to the API is that it tends to be difficult to modify the API later on since a bunch of stuff is depending on it to work how it currently is..."

You could simply add a special new "tag" field to every entities of the Moi's DOM that should point to a new data structure that could contain all informative data.

Is it feasible ?

Marco (mkdm)