A service operation can have any number of inputs and outputs with types of messages or primitive types.
服务操作能够拥有任何数量的消息或者简单类型的输入和输出。
2
It also gives the total number of instances of that particular type, which allows for some primitive calculations and guesses about relative cost per instance.
它同样给出了特定类型的总示例数量,支持部分原始计算,并猜测每个实例的相对成本。
3
The XML Schema specification defines a number of primitive types, such as string, Boolean, and double, that a processor understands and provides an implementation for.