OpenAIMetadataTagger

Extract metadata tags from document contents using OpenAI functions.

Example:
    .. code-block:: python

            from langchain_openai import ChatOpenAI
            from langchain_community.document_transformers import OpenAIMetadataTagger
            from langchain_core.documents import Document

            schema = {
                "properties": {
                    "movie_title": { "type": "string" },
                    "critic": { "type": "string" },
                    "tone": {
                        "type": "string",
                        "enum": ["positive", "negative"]
                    },
                    "rating": {
                        "type": "integer",
                        "description": "The number of stars the critic rated the movie"
                    }
                },
                "required": ["movie_title", "critic", "tone"]
            }

            # Must be an OpenAI model that supports functions
            llm = ChatOpenAI(temperature=0, model="gpt-3.5-turbo-0613")
            tagging_chain = create_tagging_chain(schema, llm)
            document_transformer = OpenAIMetadataTagger(tagging_chain=tagging_chain)
            original_documents = [
                Document(page_content="Review of The Bee Movie

By Roger Ebert

This is the greatest movie ever made. 4 out of 5 stars."), Document(page_content="Review of The Godfather By Anonymous

This movie was super boring. 1 out of 5 stars.", metadata={"reliable": False}), ]

            enhanced_documents = document_transformer.transform_documents(original_documents)