langchain/docs/extras/modules/data_connection/retrievers
German Martin f1eaa9b626
Lost in the middle: We have been ordering documents the WRONG way. (for long context) (#7520)
Motivation, it seems that when dealing with a long context and "big"
number of relevant documents we must avoid using out of the box score
ordering from vector stores.
See: https://arxiv.org/pdf/2306.01150.pdf

So, I added an additional parameter that allows you to reorder the
retrieved documents so we can work around this performance degradation.
The relevance respect the original search score but accommodates the
lest relevant document in the middle of the context.
Extract from the paper (one image speaks 1000 tokens):

![image](https://github.com/hwchase17/langchain/assets/1821407/fafe4843-6e18-4fa6-9416-50cc1d32e811)
This seems to be common to all diff arquitectures. SO I think we need a
good generic way to implement this reordering and run some test in our
already running retrievers.
It could be that my approach is not the best one from the architecture
point of view, happy to have a discussion about that.
For me this was the best place to introduce the change and start
retesting diff implementations.

@rlancemartin, @eyurtsev

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Co-authored-by: Lance Martin <lance@langchain.dev>
2023-07-18 07:45:15 -07:00
..
how_to Fix make docs_build and related scripts (#7276) 2023-07-11 22:05:14 -04:00
integrations Lost in the middle: We have been ordering documents the WRONG way. (for long context) (#7520) 2023-07-18 07:45:15 -07:00