Interfaces into the cloud vary also, though a lightweight REST interface is preferred, even if it is not currently offered by every cloud computing provider.
与云的接口也各不相同，虽然轻量的REST接口是首选，但现在并不是每个云计算提供商都提供这种接口。
2
HTTP clients may pass over the preferred data formats and languages along with the target URI in the request header, and the content provider should serve these Settings.
Related to this need is the requirement that the data format preferred by the consumer may be different from the data format employed by the service provider.