automatic completion of file tags

[Alan Schmitt]

Hello,

I'm playing with an implementation of Zettelkasten using deft and org
files, and I want to tag each note with some tags taken from a list (I'm
using the ~#FILETAGS:~ line for that at the moment). Is there a builtin
org way of doing it (have a list of tags defined somewhere and tag a
whole file with them using some completion mechanism, as for headlines),
or do I need to roll up my own?

Thanks,

Alan