. ▁ ▁M OF ▁and ▁U ML ▁are ▁standards ▁of ▁the ▁O M G ▁ ▁O log ▁is ▁a ▁category ▁the or etic ▁approach ▁to ▁ont ologies , ▁emphas izing ▁transl ations ▁between ▁ont ologies ▁using ▁fun ctors . ▁▁ ▁O BO , ▁a ▁language ▁used ▁for ▁bi ological ▁and ▁bi omed ical ▁ont ologies . ▁ ▁On to U ML ▁is ▁an ▁ont olog ically ▁well - f ounded ▁profile ▁of ▁U ML ▁for ▁concept ual ▁model ing ▁of ▁domain ▁ont ologies . ▁ ▁O W L ▁is ▁a ▁language ▁for ▁making ▁ont ological ▁statements , ▁developed ▁as ▁a ▁follow - on ▁from ▁R DF ▁and ▁R DF S , ▁as ▁well ▁as ▁earlier ▁ont ology ▁language ▁projects ▁including ▁O IL , ▁DA ML , ▁and ▁DA ML + O IL . ▁O W L ▁is ▁intended ▁to ▁be ▁used ▁over ▁the ▁World ▁W ide ▁Web , ▁and ▁all ▁its ▁elements ▁( classes , ▁properties ▁and ▁individuals ) ▁are ▁defined ▁as ▁R DF ▁resources , ▁and ▁identified ▁by ▁U R Is . ▁ ▁Rule ▁Inter change ▁Format ▁( RI F ) ▁and ▁F - Log ic ▁combine ▁ont ologies ▁and ▁rules . ▁ ▁Sem antic ▁Application ▁Design ▁Language ▁( S AD L ) ▁capt ures ▁a ▁subset ▁of ▁the ▁express iveness ▁of ▁O W L , ▁using ▁an ▁English - like ▁language ▁entered ▁via ▁an ▁Eclipse ▁Pl ug - in . ▁ ▁S B V R ▁( Sem antics ▁of ▁Business ▁V oc ab ular ies ▁and ▁R ules ) ▁is ▁an