Angularjs Accordion Access isOpen State
First, you have to use a parent object like in Angular UI's docs' example, status object for example:
<div accordion-group="" ng-init="status = {isOpen: false}" is-open="status.isOpen"> <div accordion-heading=""> <div ng-class="{'is-open': status.isOpen}">NUTRIENT PROFILES</div> </div> ... </div>Then, you can perfectly use the same object name for nested accordion. Reason is simple: accordion-group directive will instantiate a new scope for each group. This way, when a status.isOpen is changed, it won't affect other groups.
Check it: http://plnkr.co/edit/nJ654pvE1itnGDQGp2rk?p=preview