+ policy format see
+ <citerefentry><refentrytitle>systemd.preset</refentrytitle><manvolnum>5</manvolnum></citerefentry>. For
+ more information on the concept of
+ presets please consult the <ulink
+ url="http://freedesktop.org/wiki/Software/systemd/Preset">Preset</ulink>
+ document.</para>