The REST principle

Remote Function Call (RFC) 2616 (https://www.ietf.org/rfc/rfc2616.txt) defines a set of principles for building HTTP and Uniform Resource Identifier (URI) standards. Today's REST is based on these principles. In a nutshell, these principles can be understood as follows:

• Everything is a resource: All the data on the Internet has a format to describe by content-type. 
• All the resources are identifiable by a unique identifier: Each resource is accessible via the URI (Uniform Resource Identifier) and is identified uniquely. 
• Resources can be manipulated by standard HTTP methods: RFC 2616 defines eight HTTP verbs: GET, POST, PUT, DELETE, HEAD, OPTIONS, TRACE, and CONNECT. 
• Resources have multiple formats and can be created in different representations: Resources can be created in XML format or JSON format. In our project,...