Making an Attr control another Attr's Max value

[molemansd7]

I was searching through the forums, but couldn't find a good solution, so I thought I'd pose the question...
Is there a way that I  could have an attribute on a control, update the max limit of another attribute on the same control?

Any solutions or directions on where to start looking would be helpful. I just can't think of a way to do it, without making an expression with some MEL in it, which I know Jooja is all over debunking. So I'm trying to avoid it. Any thoughts?

I have this expression kind of working....

$limit = nurbsCircle1.fidelity;

addAttr -e -maxValue $limit ".uVal";

but it doesn't update the limit or set the .uVal to be the limit if its exceeded. Any way to make it force the update?

[joojaa]

Well few nodes allow you to set minmax with attributes mostly tough theers no mechanism other than making your own node, that can do this in general.

[molemansd7]

Hm... aight. That's a bit beyond me, but thanks for the response.