#autoload

if compset -P '*\{'; then
  local expl

  _description expl 'RPM tag'
  compadd "$expl[@]" -M 'm:{a-z}={A-Z}' -S '}' - \
          "${(@)${(@f)$(rpm --querytags)}#RPMTAG_}"
else
  _message 'RPM format'
fi