What are the differences between endpoint disco WSDL and WebService in three ways?

Endpoint:Http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx
The URI address of the web service. After you access the service, the related class descriptions, method lists, and method descriptions of the web service will appear.

Disco:Http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx? Disco
You can find this web service. That is, a discovery mechanism disco in the Web service discovery mechanism is used.

WSDL:Http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx? WSDL
The descriptive language of the web service. Web Services Description Language. Describes the methods and properties defined by your web service, binding protocol, port, and service Uri.