GDSL-D taxanaha tijaabada duridda aasaasiga ah ee hadda jira, waa qalabka ugu habboon ee lagu tijaabiyo aaladda hadda sare ee tamarta iyo warshadaha korontada, oo loo isticmaalo warshadaha tamarta, xarumaha qaybinta, wax soo saarka korantada iyo machadyada cilmi-baarista, oo leh astaamo cabbir yar, miisaan fudud. , isticmaalka fudud iyo dayactirka.