RAML (RESTful API Modeling Language)
RAML is a YAML-based modelling language for RESTful APIs, originally created by Mulesoft. RAML 1.0 (2016) is the current stable specification. RAML governance has effectively converged with Mulesoft / Salesforce, and the broader industry has shifted toward OpenAPI; RAML remains in use across legacy Mulesoft / Anypoint stacks. Spec licensed under Apache 2.0.