▁file , ▁the ▁Top site ▁Tem pl ating ▁System ▁poss esses ▁other ▁features , ▁such ▁as : ▁User - defined ▁' tags ' ▁that ▁allow ▁quick ▁referencing ▁of ▁a ▁pre written ▁library ▁from ▁within ▁Top site ▁Tem pl ating ▁System ▁(. ts ) ▁files ▁Dynamic ▁inclusion ▁of ▁other ▁T TS ▁files ▁into ▁the ▁output ▁stream ▁Multiple ▁output ▁modes ▁A ▁shared ▁object ▁system ▁for ▁communication ▁between ▁execution ▁frames ▁Multiple ▁server ▁interfaces ▁( mod _ python ▁and ▁CG I ▁are ▁currently ▁supported ) ▁Bu ilt - in ▁URI - level ▁content ▁caching ▁with ▁intellig ent ▁CG I ▁argument ▁handling ▁ ▁Coll ision ▁of ▁Top site ▁name ▁Because ▁the ▁Top site ▁Tem pl ating ▁System ▁is ▁sometimes ▁inform ally ▁referred ▁to ▁as ▁' Top site ', ▁it ▁is ▁possible ▁for ▁confusion ▁to ▁occur ▁about ▁the ▁Top site ▁Tem pl ating ▁System ▁with ▁regards ▁to ▁the ▁other ▁common ▁uses ▁of ▁the ▁term ▁' Top site ' ▁by ▁the ▁w are z ▁community ▁and ▁a ▁site ▁ranking ▁system ▁Top site ▁( www ) ▁which ▁should ▁be ▁known ▁as ▁a ▁top ▁site ▁list . ▁ ▁The ▁author ▁of ▁the ▁Top site ▁Tem pl ating ▁System ▁as ser ts ▁that ▁the ▁collision ▁of ▁these ▁terms ▁is ▁purely ▁coinc ident al . ▁ ▁To ▁avoid ▁confusion , ▁he ▁suggests ▁that ▁the ▁Top site ▁Tem pl ating ▁System ▁should ▁only ▁be ▁c ited ▁in ▁its ▁full ▁form ▁( or ▁its ▁ac ron ym , ▁T TS ), ▁and ▁not ▁by ▁the ▁term ▁' Top site '. ▁ ▁External ▁links ▁▁▁ ▁Category :