chosen directive to set class 'chosen' on a given item in a group of items This is equivalent to setting 'active' class on the item.
##Usage
Directive parameters:
chosen=”groupname”
where, “groupname” is the name of the items group.
namespace=”module-name”
where, “module-name” is the name of the namespace the item group is being used in. This is optional parameter, only required when the item group is used multiple times on the same page.