prop panel relationship relationship prop panel object element model facad associ element model facad associ role element prop panel associ role prop panel associ model facad depend element model facad abstract element prop panel abstract model facad element prop panel permiss model facad usag element prop panel usag model facad bind element prop panel bind prop panel depend defin usecasediagram lp usecasediagram granular type statement model facad extend element prop panel extend endif model facad flow element prop panel flow model facad gener element prop panel gener defin usecasediagram lp usecasediagram granular type statement model facad includ element prop panel includ endif illeg argument except unsupport relationship type 