The date at which the recompression treatment began. The only element inside <dateofrecompressiontreatment> is <datetime>.
<datetime>
(see also <dive>)
<repetitiongroup id="rep345"> <dive> ... <hyperbaricfacilitytreatment> <!-- start of recompression treatment --> <dateofrecompressiontreatment> <!-- Date February 4th, 1999 (Thursday) --> <datetime>1999-02-04</datetime> </dateofrecompressiontreatment> <!-- here more statements --> ... <hyperbaricfacilitytreatment> </dive> <!-- here can follow more dives --> ... </repetitiongroup>