Interactions Require @id -- Why?

[Eliot Kimber <ekimber@reallysi.com>]

At least in my copy of the L&T learningDomain module, which I think is the
latest, all the interaction elements (lcTrueFalse, lcMatching, etc.) require
@id.

Why?

I didn't see any mention of it in the reference documentation?

The base topic/fig type does not require @id.

Cheers,

Eliot

----
Eliot Kimber | Senior Solutions Architect | Really Strategies, Inc.
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