Version 3: The shorthand for OpenAPI 3.0 (and more recent minor versions), the most recent OpenAPI specification.Version 2: The shorthand for Swagger 2.0 and OpenAPI 2.0, which are two names for the same specification format.Swagger file: Another term for the Swagger flavor of API definition.Also, SmartBear’s line of tools to interact with Swagger and OpenAPI files. Swagger: The original API description format, which later became OpenAPI.Specification: A set of rules that defines the format for OpenAPI and Swagger.OpenAPI Initiative: The industry-wide working group that maintains the OpenAPI format.OpenAPI file: An individual OpenAPI document.OpenAPI document: Another term for the OpenAPI flavor of API definition.OpenAPI: A specification which declares a syntax for the human and machine-readable API descriptions.Documentation: The human-readable API reference, getting started guides, tutorials, and any other content used to introduce an API to a developer.Description: Another term for an API definition, which describes a specific API.Definition: The document, in either Swagger or OpenAPI format, that defines a specific API.We’ve gathered the essential definitions in this brief glossary so you can reference your knowledge before you begin. If you're new to this topic you’ll see many unfamiliar terms used throughout this guide and on the web as you research Swagger and OpenAPI specifications. Easier sharing and publication of API specifications.Allow automated testing for API validity.Easier documentation management, comprehensive by nature.Key advantages of API description formats like Swagger and OpenAPI: We’ll explore the ways to use OpenAPI and Swagger in the remainder of this guide. They’re easy to create and can be used in many forms of automation. These machine-readable formats define everything a developer needs to integrate with an API: authentication, endpoints, HTTP methods, request data, response fields, and detailed error codes. Swagger and OpenAPI are specifications to describe HTTP APIs (the most common type of API). The reference guide is the source of truth that developers return to whenever there’s a serious issue or question about an API’s functioning, and therefore must be painstakingly managed. The API’s reference guide provides the first impression of quality and consistency. Even worse, if API response data changes, there’s no way for developers to learn what to expect from each request.Ī developer’s experience with an unfamiliar API is dictated by its documentation. New endpoints go undocumented, which unfortunately means they will never exist in the minds of most developers. API documentation is easily neglected and becomes outdated.
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It’s a chore to produce, especially when it exists as a task to be done separate from the original code creation. The challenge: Manually creating comprehensive and accurate documentation is difficult. HTTP API descriptions, like those described in the OpenAPI Specification, end up being helpful in a variety of ways for your development teams, but also your broader users.
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How to Use OpenAPI and Swagger for Documentation (and More).In this guide, we explain Swagger and OpenAPI, how to create an OpenAPI or Swagger description for an API, and how to use the OpenAPI Specification to yield documentation that’s continuously up-to-date and automated! Excellent API documentation experiences stem from proper use of an OpenAPI or Swagger API description file.