Which information retrieval model does ES used?

Elastic Stack Elasticsearch
1

Hi all,

Does anybody know which information retrieval model is utilized in ES?
TF*IDF-based vector space model or some relevance-based language
model？Could I change these model？
Thanks very much.

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2

Hello!

In the 0.20.x (and before that) ElasticSeaerch uses the TF-IDF model, in 0.90 (for example in the 0.90 RC2) you'll be able to choose a different document ranking model (http://www.elasticsearch.org/guide/reference/index-modules/similarity/).

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Regards,

Rafał Kuć

Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch - ElasticSearch

Hi all,

Does anybody know which information retrieval model is utilized in ES? TF*IDF-based vector space model or some relevance-based language model？Could I change these model？

Thanks very much.

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3

Thanks for your reply.
It's considerably helpful for me.​

On Mon, Apr 22, 2013 at 4:05 PM, Rafał Kuć r.kuc@solr.pl wrote:

Hello!

In the 0.20.x (and before that) ElasticSeaerch uses the TF-IDF model, in
0.90 (for example in the 0.90 RC2) you'll be able to choose a different
document ranking model (
Elasticsearch Platform — Find real-time answers at scale | Elastic).

*--
Regards,
Rafał Kuć
Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch -
Elasticsearch

Hi all,

Does anybody know which information retrieval model is utilized in ES?
TF*IDF-based vector space model or some relevance-based language
model？Could I change these model？
Thanks very much.

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Wang Jingang(王金刚)
Ph.D. Candidate at
Lab of High Volume Language Information Processing & Cloud Computing
School of Computer Science
Beijing Institute of Technology
Beijing 100081
P.R China

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