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Originally developed to support the Swagger framework, it became a separate project in 2015, overseen by the OpenAPI Initiative, an open-source collaboration project of the Linux Foundation. [2] [3] An OpenAPI Description (OAD) [4] represents a formal description of an API that tools can use to generate code, documentation, test cases, and more.
Like a remote interface, a Web service endpoint interface defines the business methods of the bean. In contrast to a remote interface, a Web service endpoint interface is not accompanied by a home interface, which defines the bean's life-cycle methods. The only methods of the bean that may be invoked by a Web service client are the business ...
Ramesh Pidikiti led implementation of the initial code generator and designer/developer Zeke Sikelianos coined the name Swagger. The Swagger API project was made open source in September 2011. Soon after release, a number of new components were added to the project, including a stand-alone validator and support for Node.js and Ruby on Rails.
An example of a popular web API is the Astronomy Picture of the Day API operated by the American space agency NASA. It is a server-side API used to retrieve photographs of space or other images of interest to astronomers, and metadata about the images. According to the API documentation, [15] the API has one endpoint:
The Web Application Description Language (WADL) is a machine-readable XML description of HTTP-based web services. [1] WADL models the resources provided by a service and the relationships between them. [1]
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.
For example, the ability to create an account on an external site/app using your Facebook credentials is made possible using Facebook's open API. Many large technology firms, such as Twitter, LinkedIn and Facebook, allow the use of their service by third parties and competitors .
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.