timer.xml

   <!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
                      "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
<!-- GDBus 2.32.3 -->
<node>
  <interface name="de.tvdr.vdr.timer">
    <method name="New">
      <arg type="s" name="timer" direction="in">
      </arg>
      <arg type="i" name="replycode" direction="out">
      </arg>
      <arg type="s" name="replymessage" direction="out">
      </arg>
    </method>
    <method name="Delete">
      <arg type="i" name="number" direction="in">
      </arg>
      <arg type="i" name="replycode" direction="out">
      </arg>
      <arg type="s" name="replymessage" direction="out">
      </arg>
    </method>
    <method name="List">
      <arg type="as" name="timer" direction="out">
      </arg>
    </method>
    <method name="Next">
      <arg type="i" name="replycode" direction="out">
      </arg>
      <arg type="i" name="number" direction="out">
      </arg>
      <arg type="i" name="seconds" direction="out">
      </arg>
      <arg type="t" name="start" direction="out">
      </arg>
      <arg type="t" name="stop" direction="out">
      </arg>
      <arg type="s" name="title" direction="out">
      </arg>
    </method>
  </interface>
</node>