Via <cameraref ref="id_of_camera_to_be_cross-referenced"/> access to data stored under this identifier is possible. By means of this it is possible to exactly list the equipment configuration used during a specific dive, for example.
<dive>, <equipmentused>
<uddf version="2.2.0">
<generator>
<!-- information about the generating software -->
</generator>
<diver>
<owner id="o1">
<!-- description of the owner of the UDDF file -->
<equipment>
<camera id="my_camera">
<!-- description of the camera used -->
</camera>
<!-- description of more equipment used by the owner of the UDDF file -->
</equipment>
</owner>
<buddy id="b1">
<!-- description of a dive buddy -->
</buddy>
<!-- here can stand more <buddy> elements, if necessary -->
</diver>
<!-- here can stand more sections -->
<profiledata>
<repetitiongroup>
<dive id="dive-1">
<!-- description of the first dive -->
<!-- description of (cross-referencing on) equipment used -->
<!-- camera: -->
<cameraref ref="my_camera"/>
<!-- here cross-referencing on further equipment is possible -->
</dive>
<!-- here description of further dives -->
</repetitiongroup>
<!-- here can stand more <repetitiongroup> elements -->
</profiledata>
</uddf>