Web services and RPC

Hi I have misunderstanding in the two terms What is the technical differences between Web Serv开发者_运维知识库ice and RPC ? can we consider a WS as a XML RPC and is it a xmlRpc ?

thanks

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Both terms are somewhat vague, and do not refer to specific technologies. Web services can be used to make RPCs using WSDL or one of a few standards which are roughly equivalent, such as CORBA, RMI, or DCOM.

WSDL can be used to describe a SOAP web service, or (in WSDL 2.0) a RESTful one.