dt lk s systm r rpstry f dt strd n ts ntrl/rw frmt, slly bjct blbs r fls. dt lk s slly sngl str f dt ncldng rw cps f src systm dt, snsr dt, scl dt tc., nd trnsfrmd dt sd fr tsks sch s rprtng, vslztn, dvncd nlytcs, nd mchn lrnng. dt lk cn ncld strctrd dt frm rltnl dtbss (rws nd clmns), sm-strctrd dt (CSV, lgs, XML, JSN), nstrctrd dt (mls, dcmnts, PDFs), nd bnry dt (mgs, d, vd). dt lk cn b stblshd n prmss (wthn n rgnztn's dt cntrs) r n th cld (sng cld srvcs).