In particular, you will often have multiplechoices about how to structure your use case model 11; when you do, align your use case model with the above attributes.
While having multiplechoices in the way the service is used and allowing binding extensions is useful, it makes it difficult for clients to have a uniform way of viewing the service.
虽然有多种选择使用服务和允许绑定扩展是很有用的，但这给客户机以统一方式查看服务造成了困难。
3
Fundamentally, type inference is a constraint-solving technique, and there are often multiple reasonable choices for which constraints to start with.