as well as in the process of being activated or
deactivated, i.e. between the two states (these states
are called 'activating', 'deactivating'). A special
- 'maintenance' state is available as well which is very
+ 'failed' state is available as well which is very
similar to 'inactive' and is entered when the service
failed in some way (process returned error code on
exit, or crashed, or an operation timed out). If this
ideas behind systemd please refer to the <ulink
url="http://0pointer.de/blog/projects/systemd.html">Original
Design Document</ulink>.</para>
+
+ <para>Note that some but not all interfaces provided
+ by systemd are covered by the <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/InterfaceStabilityPromise">Interface
+ Stability Promise</ulink>.</para>
</refsect1>
<refsect1>