OpenAI function for Source Citations in a RAG architecture

function.js

   {
        "name": "answer_and_sources",
        "description": "Gets an answer and cites the relevant sources used to provide the answer.",
        "parameters": {
            "type": "object",
            "properties": {
                "answer": {
                    "type": "string",
                    "description": "The answer to the user's question.",
                },
                "sources": {
                    "type": "array",
                    "items": {
                        "type": "number",
                    },
                    "description": "The IDs of any sources which were used in generating the answer.",
                },
            },
            "required": ["answer", "sources"],
        },
    }