It is exactly what you need for treating a tree of tiddlers as a set, as if they all had the same tag.
Create one that lists all the tiddler s in your tree then use that filter for the batch delete.
Regards
Tony
I do not have the kin filter on my mobile but I think all you need is kin[roottiddler] and it will list all tiddlers in your tree.
Regards
Tony
[kin::to[Top tag 1]] [kin::to[Top tag 2]]