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There are two previous major description languages: WSDL 2.0 (Web Services Description Language) and WADL (Web Application Description Language). Neither is widely adopted in the industry for describing RESTful APIs, citing poor human readability of both and WADL being actually unable to fully describe a RESTful API. [2]
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 ...
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.
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 .
API use can vary depending on the type of programming language involved. An API for a procedural language such as Lua could consist primarily of basic routines to execute code, manipulate data or handle errors while an API for an object-oriented language , such as Java, would provide a specification of classes and its class methods .
The aim of the research of the model as stated by the author was to find out the relationship between the constraints of REST and other forms of web services. [ 1 ] It divides the principal parts of RESTful design into three steps: resource identification ( URI ), HTTP verbs, and hypermedia controls (e.g. hyperlinks ).
Restful Objects also defines a standard set of resources for accessing or manipulating these representations. The specification defines which HTTP methods may be used with each resource, and their meaning. The table below shows a partial summary:
Defines the SOAP actions and the way the message is encoded, for example, "literal." An operation is like a method or function call in a traditional programming language. Message — Typically, a message corresponds to an operation. The message contains the information needed to perform the operation. Each message is made up of one or more ...