openapi-specification-extensions
A resource for common and standardised OpenAPI specification (vendor) extensions.
As well as a list of vendor-documented specification-extensions, this repository contains the results of an analysis of extensions and formats used in real-world OpenAPI definitions, as at late March 2017. It is also planned to replicate this analysis but on a much larger scale.
Vendor-documented extensions
Analysis of specification-extensions
Analysis of $refs with additional properties