Specification
The API’s specification is directly related to the chosen architectural style. In other words, there’s at least one specification that’s compatible with each architectural style. Sometimes, the specification is even a part of the architectural style. For example, a REST API can be defined using the OpenAPI specification. However, OpenAPI can also define APIs that don’t follow the REST architectural style. As a different example, let’s say you define a GraphQL API using the architectural style documentation. There’s no need to use a separate specification. In either case, the outcome is that you will have a machine-readable API definition. This is important because API consumers communicate with APIs using tools that can read definitions. Without those machine-readable definitions, you would have to ask users to enter all the requested details by hand. Every time developers build an integration with an API, they can use a machine...
