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Instead, the client is given a set of entry points and the API is discovered dynamically through interaction with these endpoints. HATEOAS was introduced in Roy Fielding's doctoral thesis Architectural Styles and the Design of Network-based Software Architectures. HATEOAS is one of the key elements distinguishing REST from RPC mechanisms. [3]
REST (Representational State Transfer) is a software architectural style that was created to guide the design and development of the architecture for the World Wide Web. REST defines a set of constraints for how the architecture of a distributed, Internet -scale hypermedia system, such as the Web, should behave.
It categorizes a Web API into four levels (from 0 to 3) with each higher level corresponding to a more complete adherence to REST design. The next level also contains all the characteristics of the previous one. [4] [5] Other classification systems for Web API services design also exist, such as CoHA and WS 3. [3]
While REST is a set of architectural guidelines applicable to various types of computing infrastructures, Resource Oriented Architecture (ROA) is only coupled with the web. This architecture is therefore useful mostly to businesses that consider the web as the computing/publishing platform of choice.
A user-agent makes an HTTP request to a REST API through an entry point URL. All subsequent requests the user-agent may make are discovered inside the response to each request. The media types used for these representations, and the link relations they may contain, are part of the API. The client transitions through application states by ...
The RESTful Service Description Language (RSDL) is a machine- and human-readable XML description of HTTP-based web applications (typically REST web services). [1]The language (defined by Michael Pasternak during his work on oVirt RESTful API) allows documenting the model of the resource(s) provided by a service, the relationships between them, and operations and the parameters that must be ...
RESTful API Modeling Language (RAML) is a YAML-based language for describing static APIs (but not REST APIs). [2] It provides all the information necessary to describe APIs on the level 2 of the Richardson Maturity Model .
"The OASIS OData TC works to simplify the querying and sharing of data across disparate applications and multiple stakeholders for re-use in the enterprise, Cloud, and mobile devices. A REST-based protocol, OData builds on HTTP, AtomPub, and JSON using URIs to address and access data feed resources. It enables information to be accessed from a ...