IDF per category

Elastic Stack Elasticsearch
1

I have a set of categories containing some products

I would like to index the label and the category of the products (to handle
record linkage).

the issues is: some terms are common for some categories but could be
discrimant for other categories.

So I would like to compute the IDF of a word not for all the products but
per category.

How to handle that?

  1. creating several indexes? one per category

  2. or creating several objects inside an index ? one per category

thanks

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2

Hello ,

You can do a 2 level aggregation term query with first level as category
and second level as the content.

{
"aggregations": {
"categories": {
"terms": {
"field": "category"
},
"aggregations": {
"categories": {
"terms": {
"field": "content"
}
}
}
}
}
}

Aggregations -

Terms aggregation -

Thanks
Vineeth

On Tue, Sep 2, 2014 at 8:36 PM, NM n.maisonneuve@gmail.com wrote:

I have a set of categories containing some products

I would like to index the label and the category of the products (to
handle record linkage).

the issues is: some terms are common for some categories but could be
discrimant for other categories.

So I would like to compute the IDF of a word not for all the products but
per category.

How to handle that?

  1. creating several indexes? one per category

  2. or creating several objects inside an index ? one per category

thanks

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