Syntax:

<device-type>device_type|ajax`</device-type>

[Optional]
since 3.6.3
[Default: ajax]

It specifies the device type that <timeout-uri> and <automatic-timeout> are applied to. By default, it is ajax. If you want to specify the timeout URI for mobile device, use mil.

Notice that only <timeout-uri> and <automatic-timeout> depend on this. Others, such as <session-timeout>, are applied to all devices, regardless what is specified here.