klr s fr nd pn src mltpltfrm dcmnt vwr dvlpd by th KD cmmnty bsd n th Qt nd KD Frmwrks lbrrs. t s dstrbtd s prt f th KD pplctns bndl. t rplcd KPDF, ts mn prdcssr, lngsd KGhstVw, KFx, KFxvw nd KDV n KD 4. ts fnctnlty cn b mbddd n thr pplctns.