Cln RLs (ls knwn s sr-frndly RLs, prtty RLs, srch-ngn–frndly RLs r RSTfl RLs) r wb ddrsss r nfrm Rsrc Lctrs (RLs) ntndd t mprv th sblty nd ccssblty f wbst, wb pplctn, r wb srvc by bng mmdtly nd nttvly mnngfl t nn-xprt srs. Sch RL schms tnd t rflct th cncptl strctr f cllctn f nfrmtn nd dcpl th sr ntrfc frm srvr's ntrnl rprsnttn f nfrmtn. thr rsns fr sng cln RLs ncld srch ngn ptmztn (S), cnfrmng t th rprsnttnl stt trnsfr (RST) styl f sftwr rchtctr, nd nsrng tht ndvdl wb rsrcs rmn cnsstntly t th sm RL. Ths mks th Wrld Wd Wb mr stbl nd sfl systm, nd llws mr drbl nd rlbl bkmrkng f wb rsrcs.
Cln RLs ls d nt cntn mplmnttn dtls f th ndrlyng wb pplctn. Ths crrs th bnft f rdcng th dffclty f chngng th mplmnttn f th rsrc t ltr dt. Fr xmpl, mny RLs ncld th flnm f srvr-sd scrpt, sch s xmpl.php, xmpl.sp r cg-bn. f th ndrlyng mplmnttn f rsrc s chngd, sch RLs wld nd t chng lng wth t. Lkws, whn RLs r nt "cln", f th st dtbs s mvd r rstrctrd t hs th ptntl t cs brkn lnks, bth ntrnlly nd frm xtrnl sts, th lttr f whch cn ld t rmvl frm srch ngn lstngs. Th s f cln RLs prsnts cnsstnt lctn fr rsrcs t sr gnts rgrdlss f ntrnl strctr. frthr ptntl bnft t th s f cln RLs s tht th cnclmnt f ntrnl srvr r pplctn nfrmtn cn mprv th scrty f systm.