As far as I know, in order to share a whole tabble vocabulary with another user, one has to share every single tabble which is part of that vocabulary, individually.

In case of an extensive hierarchical tag structure, it would be a timesaver to have the ability to select a root within the tree (possibly the top root – ‘Workspace’), and share the whole subtree below (and including) the selected root tabble in a single operation.

Example scenario:
1) Select ‘Workspace’ tabble
2) Command ‘share tabble tree’ (or something similar)
3) Select the group to share with
<all tabbles below and including ‘Workspace’ would now be shared with the group>