yvasiyarov/swagger — pull request #42 by polyglot-jones (2014-11-19 00:40:25+00:00)
Title: For any direct-equivalency type definitions (i.e. non-struct, e.g. "type foo string"), ...

... any references to the defined type (foo) will be replaced with the underlying type (string) at parse-time, as if the annotation referred to the underlying type (string) all along. This prevents the model section from being cluttered with empty (foo) definitions.