database semantics造句

• Can contain the value null and use database semantics for evaluating nulls
  可包含null值并可使用数据库语义计算null值。
• If xml semantics or database semantics show up in your code , then you ve probably got a data binding api that is poorly written , poorly implemented , or both
  如果在代码中暴露xml语义和数据库语义，就可能得到编写很差、实现很差或者两者都很差的数据绑定api 。