Exporting tables directly

If you want to use table data from another module, like at Module:form of, then it's a good idea to add in a comment in the module which other modules use it. That way, it's easier to change later. Functions can be tracked if needed to rename them, but tables can't.

Actually, they can:

export.whatever = nil

setmetatable(export, {
	__index = function (self, key)
		if key == 'whatever' then
			require('Module:debug').track('whatever')
			return whatever
		end
	end
})

But I agree, annotating these is a good idea.

That code snippet would be very useful to preserve on Category:Template tracking!