For example, revising Geography of the World requires taking account of changes in the populations, life expectancies, literacy rates, and landscapes of each country. Each of these changes necessitates changes in the layout, nearly tantamount to producing a new book entirely.
以《新世紀世界地理百科全書》修訂本為例，各國人口、平均壽命、識字率、地理景觀等都有改變，而內容只要有增減，編排方式也會變，更新版等於是重新企劃製作一本書。