網絡內容產業的產品基本可以歸類為兩類，壹類是受版權保護的作品（copyrightable work）；另壹類是不受版權保護的信息產品(uncopyrightable work)。
例句：The four criteria that Congress, courts, and theorists have traditionally employed to distinguish the copyrightable from the uncopyrightable are as below.
國會，法院和理論家用於區分受版權保護的和不受版權保護的作品四個標準如下。