Latent Semantic Indexing in Elastic search

Elastic Stack Elasticsearch
1

Hi,
I am trying to use "Latent Semantic Indexing " as the custom Similarity Algorithm in Elastic Search. What is the way I can do it? Does elastic Search provide any plugin architecture for this particular Algorithm?

2

Hi Elastic team,

I'm having the similar requirement, but not finding a way how to accommodate it.
Is the ranking module is pluggable?

Thanks,
Arun Ramachandran.

3

By default several similarities are available:
https://www.elastic.co/guide/en/elasticsearch/reference/current/index-modules-similarity.html#_available_similarities

If you want a new one, you need to write a plugin that defines your custom similarities. Though latent semantic indexing requires a lot of additional structures to score a document so you'll need to build these infos outside of ES and find a way to make them available in your similarity.

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