= MET Document Coding System = == Document and Revision Code Format == Document Code ||<-13> '''Document Code''' || - ||<-2> '''Revision Code''' || || a || - || b || - || ccC || - || DD || - || EEEE || - || fffff || - || gggg || - || Rev- || rr || Component Description || '''Part''' || '''Description''' || '''Comments''' || || a || Stage || DBR Metro 4 Stage (currently 1) || || b || Project phase || numeric || || cc || Key Aspect || numeric || || C || Discipline || numeric || || DD || Language Code || EN, HU, EH || || EEEE || Source || e.g. METS || || fffff || Document number || numeric || || gggg || Part || alphanumeric, '''optional''', FP - front page || || rr || Revision Number || alphanumeric 1-9, A-Z, AA-ZZ ||