def _get_pandoc_key(key: str) -> str | None:
        """Map Pandoc metadata keys to our standard metadata keys.

        Args:
            key: The key from Pandoc metadata

        Returns:
            The mapped key name for our system, or None if not mapped
        """
        if key == "abstract":
            return "summary"

        if key == "date":
            return "created_at"

        if key in ("contributors", "author"):
            return "authors"

        if key == "institute":
            return "organization"

        if key not in Metadata.__annotations__:
            return None

        return key
Map Pandoc metadata keys to our standard metadata keys.

        Args:
            key: The key from Pandoc metadata

        Returns:
            The mapped key name for our system, or None if not mapped
        
kreuzberg/_extractors/_pandoc.py