This add-on is unsupported going forward. I strongly recommend using the Blitzkrieg: Advanced Browser Sidebar or Glutanimate's Hierarchical Tags 2.
Echelon
An Anki 2.1 Addon for Hierarchical Tags, with context aware renaming.
Based off the addon we know and love Hierarchical Tags by pneff, ported to anki 2.1 plus some enhancements
- Clicking on a tag such as
it will no longer show all cards with tags beginning in it*
- Allowing any tag separator - configurable in
Tools>Addons>Config
- Renaming tags appropriate to the tag hierarchy on right click!

Config
This add-on will work as expected out of the box, but there are some settings you can configure to suit your needs.
default_depth - Default depth expanded to on opening the Browser. Set to 0 for a completely closed tree
full_tag - Defaults to false. Means that the tag Apple::Braeburn::Juicy will be displayed as Juicy under the tags Apple and Braeburn
separator - Defaults to :: but can be changed if you're using something different.
Renaming Tags
Right clicking on a tag in the browser will give you the option to enter a new name.
Echelon will then sensibly rename any child tags so that the hierarchy is preserved.
As ever feel free to suggest any features or raise any bugs!