This plugin allows groups to be created as sub-groups of groups. 

Features

• Subgroups behave exactly as regular groups
• Subgroups can be open or closed membership
• Subgroups initially inherit any styles from the parent group (using group_custom_layout)
• Subgroups can themselves have subgroups
• Option to display/hide subgroups in default group listings all/mine/owned as well as those provided by group_tools closed/open/alpha
• Option to list groups alphabetically in personal group listings
• Sub-groups listing on default groups profile page
• Sub-groups widget for use with widget_manager on groups profile page

Properties of Subgroups

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- only members of the parent group can join a sub-group

- sub-groups are fully qualified groups in their own right, may have sub-groups of their own

- infinite depth of sub-groups

- breadcrumb navigation on group pages shows path from parent to current group

- groups owner block contains link to parent group- groups owner block contains link to subgroups

- when users leave a parent group, they are removed from all subgroups

Events

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Creating a subgroup

- subgroup automatically inherits colors/backgrounds from parent if group custom layout is used

Deletion of a group

- if the group has subgroups, all subgroups will be deleted

- content within subgroups can be reassigned to the original owner, to the parent group, or deleted

Updating a group

- if the group has subgroups, and the visibility of the group becomes more restrictive, the visibility of subgroups is updated to be at least that restrictive

Produced for and with the support of Athabasca University, Canada.