《文心雕龙·诔碑》
所以，用石刻来赞颂功勋的就属于铭，树石立碑来讲述死者的事就属于诔。
是以勒石赞勋者，入铭之域；树碑述亡者，同诔之区焉。
Therefore, eulogies written on stone carvings to praise the achievements of people are regarded as "inscriptions", and eulogies written on stone tablets to tell the stories of the deceased are regarded as "epitaphs".