BaseConversationalRetrievalChain

The chain used to combine any retrieved documents.

The chain used to generate a new question for the sake of retrieval. This chain will take in the current question (with variable question) and any chat history (with variable chat_history) and will produce a new standalone question to be used later on.

The output key to return the final answer of this chain in.

Whether or not to pass the new generated question to the combine_docs_chain. If True, will pass the new generated question along. If False, will only use the new generated question for retrieval and pass the original question along to the combine_docs_chain.

Return the retrieved source documents as part of the final result.

Return the generated question as part of the final result.

An optional function to get a string of the chat history. If None is provided, will use a default.

If specified, the chain will return a fixed response if no docs are found for the question.

Input keys.

Return the output keys.