Armor as a container

[Gumbytie]

I ask this because of this thread: http://forums.wolflair.com/showthread.php?t=30998

Caped wrote this in response to question 3.

3. You could create the armor as a container, and "store" the mods in the armor. The armor could have a validation script to check how many items are in the container and give a warning if it exceeds the limit.

Okay, that is cool. I can easily create armour as a container. How does one go about writing a validation script to "count" items linked/attached/out into it?

I can think of any existing Edge that does something like that, so not sure of a good starting example.