Google Base offers a number of pre-defined item types, with recommended attributes for each.
Google Base提供很多预定义的条目类型，每种类型都有一些推荐的属性。
The specification of the logic model consists of pre-defined authorization actions, a sequence of states expressed by attributes of subjects, objects, and the system, and state predicates.
该逻辑框架包含了与授权相关的按时间节点预定义的行为、由主客体属性和系统所表达的状态序列及状态谓词。
应用推荐