By means of <getdcgasdefinitionsdata/> the dive computer is instructed to send data concerning stored breathing gases to the calling software/device.
(see also <divecomputercontrol>)
<uddf version="3.2.0">
<generator>
<!-- here information about the data downloading software -->
</generator>
<divecomputercontrol>
<getdcdata>
<!-- request to send all stored breathing gas information -->
<!-- on the dive computer to the calling software -->
<getdcgasdefinitionsdata/>
</getdcdata>
</divecomputercontrol>
</uddf>