Which Exchange Asset type represents a complete API specification in RAML or OAS format?

The most suitable option for representing a complete API specification in RAML or OpenAPI Specification (OAS) format is REST APIs. REST APIs are designed around the principles of Representational State Transfer and are widely used in web services development. They leverage formats like RAML and OAS to define the specifications of the services they provide, including endpoints, request and response structures, and authentication methods.

While SOAP APIs are another type of web service that utilizes XML for communication, they do not typically use RAML or OAS for their specifications and instead rely on WSDL (Web Services Description Language) formats. API Spec Fragments may represent portions of an API specification but not a complete, standalone specification. Connectors refer to reusable components that facilitate interaction with third-party APIs or services, rather than defining an API’s full structure. Thus, REST APIs are the clear choice for this question as they encompass the full API specifications in the mentioned formats.