Dria is a hub of public RAG models for developers to both contribute and utilize a shared embedding lake.
See more details about the LangChain integration with Dria at this page.

​
Installation and Setup

You have to install a python package: 
pip install dria
You have to get an API key from Dria. You can get it by signing up at Dria.

​
Retrievers

See a usage example. 
from langchain_community.retrievers import DriaRetriever