There SHOULD be an OpenAPI definition document available for Sierra's APIs via Swagger, but currently, there is not.

The OpenAPI definition document (https://swagger.io/specification/) is a standardized format for describing the structure and behavior of an API. It is a machine-readable document, usually written in JSON or YAML, that provides a comprehensive blueprint of an API's endpoints, operations, input/output parameters, response formats, authentication methods, and other essential details.

For comparison, here is an example for the Polaris API / Swagger install (on an iii training server):
https://polaris-training.polarislibrary.com/PAPIService/swagger/v1/swagger.json

Benefits of an OpenAPI Definition Document:

* Standardization: Provides a consistent format for describing APIs.
* Documentation: Automatically generates interactive API documentation (e.g., Swagger UI).
* Client Generation: Allows the generation of client libraries in various programming languages.
* Validation: Ensures requests and responses conform to the defined schema.
* Interoperability: Facilitates integration between different systems by providing a clear API contract.

Access to this document is ESSENTIAL for development and integration purposes, especially when using tools like Python and other programming languages with the APIs.

Having this document for Sierra would significantly enhance the development experience and improve integration capabilities, and should be considered essential.