Why isn't SOAP-based web service RESTful?

Question

I understand RESTful is an architecture style, but what exactly makes SOAP-based web service not count for RESTful?

It\'s not clear to me which points below (from Wikipe

Answer 1

Restful : REST is architectural style for building web service using HTTP protocol, where web services are treated as resources and some basic HTTP methods like GET, POST, DELETE are used to identify standard action on resources. RESTful web API (also called a RESTful web service) is a web API implemented using HTTP and the REST principles.

Soap : SOAP, originally defined as Simple Object Access Protocol, is a protocol specification for exchanging structured information in XML form.