What You Need to Know About OAS 3.0
What You Need to Know About OAS 3.0
This week sees the release of the first implementer’s draft of OAS v3.0 — officially released as 3.0.0-RC0 — and is a big step forward for the specification.
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Cloud Elements officially joined the Open API Initiative in November last year to continue the momentum behind organizing the world of APIs into easy-to-consume API hubs with standardized, machine-readable documentation.
Over the past few months, the members of the OAI Technical Developer Community (TDC) have been hard at work to make the next version of the OpenAPI Specification a reality: OAS 3.0.
This week sees the release of the first implementer’s draft of OAS v3.0 — officially released as 3.0.0-RC0 — and is a big step forward for the specification.
Some of the key changes you’ll see from v2.0 to v3.0 include:
- The overall structure has been rearranged for easier and extended reusability.
- JSON schema support has been extended to include
oneOf,anyOfandnotsupport. - The structure of parameters has changed to allow the use of schema in them.
- Support for cookie parameters has been added and
dataFormparameters have been eliminated. - Body parameters were extracted to their own entity.
- Support for content type negotiation has been added.
- A new format to allow static linking between responses and future requests has been added.
- Simplified and enhanced security definitions of APIs.
- A callback mechanism to describe WebHooks has been added.
At this point, the specification is feature-complete, and the implementer’s draft is intended to help work through any outstanding issues. We encourage you to get involved by starting to build against OAS 3.0 and submit feedback here.
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