th ▁Century ▁Fox , ▁Universal ▁Studios , ▁The ▁W alt ▁Disney ▁Company ▁and ▁Warner ▁B ros . ▁ ▁The ▁primary ▁purpose ▁of ▁D CI ▁is ▁to ▁establish ▁and ▁document ▁specific ations ▁for ▁an ▁open ▁architecture ▁for ▁digital ▁cinema ▁that ▁ens ures ▁a ▁uniform ▁and ▁high ▁level ▁of ▁technical ▁performance , ▁reli ability ▁and ▁quality . ▁ ▁By ▁establish ing ▁a ▁common ▁set ▁of ▁content ▁requirements , ▁distrib utors , ▁stud ios , ▁exhib itors , ▁d - cin ema ▁manufact ur ers ▁and ▁vend ors ▁can ▁be ▁assured ▁of ▁inter oper ability ▁and ▁compatibility . ▁Because ▁of ▁the ▁relationship ▁of ▁D CI ▁to ▁many ▁of ▁Hollywood ' s ▁key ▁stud ios , ▁con formance ▁to ▁D CI ' s ▁specific ations ▁is ▁considered ▁a ▁requirement ▁by ▁software ▁developers ▁or ▁equipment ▁manufact ur ers ▁target ing ▁the ▁digital ▁cinema ▁market . ▁ ▁Spec ification ▁On ▁July ▁ 2 0 , ▁ 2 0 0 5 , ▁D CI ▁released ▁Version ▁ 1 . 0 ▁of ▁its ▁" Digital ▁Cinema ▁System ▁Spec ification ", ▁commonly ▁referred ▁to ▁as ▁the ▁" D CI ▁Spec ification ". ▁The ▁document ▁describes ▁overall ▁system ▁requirements ▁and ▁specific ations ▁for ▁digital ▁cinema . ▁Between ▁March ▁ 2 8 , ▁ 2 0 0 6 , ▁and ▁March ▁ 2 1 , ▁ 2 0 0 7 , ▁D CI ▁issued ▁ 1 4 8 ▁err ata ▁to ▁Version ▁ 1 . 0 . ▁ ▁D CI ▁released ▁Version ▁ 1 . 1 ▁of ▁the ▁D CI ▁Spec ification ▁on ▁April