I'm using Zend_Navigation and am trying to integrate it with Zend_Acl. Each page in the navigation has a privilege attribute. What I can't determine is how to define multiple privileges for a single page.

Use case: A page that is for managing users. I want to display that page (in navigation) if the current signed in user's role has add, edit, or delete privileges on the Users resource.

Example entry in the navigation XML:

<admin_users>
    <label>Users</label>
    <route>default</route>
    <controller>admin</controller>
    <action>users</action>
    <resource>Users</resource>
    <privilege>add,edit,delete</privilege>
</admin_users>

Using a comma-separated list as above doesn't lend the desired behavior.