用於 RAG 的 Routing,挑選要用哪一種 indexes
llamaindex: https://docs.llamaindex.ai/en/stable/examples/query_engine/RouterQueryEngine/
## RAG with Multiple Indexes (Routing)
> 感覺跟 [[Multi-Document Agents]] 有點像?
> 也是用了 function calling 根據問題去挑工具
https://twitter.com/langchainai/status/1726010620296987008
https://github.com/langchain-ai/langchain/tree/master/templates/rag-multi-index-router
根據用戶問題,從 ArXiv, PubMed, SEC filings of 10-k forms, and Wikipedia 挑一種 indexes 檢索