Ths dtsts r sd n mchn lrnng (ML) rsrch nd hv bn ctd n pr-rvwd cdmc jrnls. Dtsts r n ntgrl prt f th fld f mchn lrnng. Mjr dvncs n ths fld cn rslt frm dvncs n lrnng lgrthms (sch s dp lrnng), cmptr hrdwr, nd, lss-nttvly, th vlblty f hgh-qlty trnng dtsts. Hgh-qlty lbld trnng dtsts fr sprvsd nd sm-sprvsd mchn lrnng lgrthms r slly dffclt nd xpnsv t prdc bcs f th lrg mnt f tm ndd t lbl th dt. lthgh thy d nt nd t b lbld, hgh-qlty dtsts fr nsprvsd lrnng cn ls b dffclt nd cstly t prdc.
Mny rgnztns, ncldng gvrnmnts, pblsh nd shr thr dtsts. Th dtsts r clssfd, bsd n th lcnss, s pn dt nd Nn-pn dt.
Th dtsts frm vrs gvrnmntl-bds r prsntd n Lst f pn gvrnmnt dt sts. Th dtsts r prtd n pn dt prtls. Thy r md vlbl fr srchng, dpstng nd ccssng thrgh ntrfcs lk pn P. Th dtsts r md vlbl s vrs srtd typs nd sbtyps.