> For the complete documentation index, see [llms.txt](https://sds-bit-mesra.gitbook.io/llm-course/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sds-bit-mesra.gitbook.io/llm-course/hands-on-development/4-realtime-rag-with-llamaindex-langchain-and-pathway.md).

# 4 – Realtime RAG with LlamaIndex/Langchain and Pathway

First, let's start with LlamaIndex. LlamaIndex is recognized as a popular RAG framework designed to augment LLMs by seamlessly integrating external, domain-specific data. 

If you're already familiar with Llamaindex and are looking to leverage its capabilities alongside Pathway for enhanced data processing and retrieval, this bonus section aims to facilitate that integration. 

Below is a Tweet along the same lines which should be pretty comprehensible for you if you've already built RAG applications (if not with real-time data). 

{% embed url="<https://x.com/jerryjliu0/status/1741862878599434294?s=20>" %}

Now let's quickly understand this and help you get started. Firstly let's cover the basics.