WSDL(网络服务描述语言)，一种界面定义语言。

WSDL (Web Services Description language), an interface definition language.

youdao

SOA是一个体系结构概念，其中所有的功能或服务都使用描述语言加以定义，且各自的接口均可通过网络进行发现。

SOA is an architectural concept in which all functions, or services, are defined using a description language and where their interfaces are discoverable over a network.

youdao

利用同样的北向机制，服务提供商可以为客户创建并提供定制化的以网络为中心的服务，以YANG或TOSCA为业务定义语言。

Using this same northbound mechanism, service providers can then create and offer customized network-centric services for their customers using YANG or TOSCA as a service definition language.

youdao