# Cardinality, adding missing documents to a different bucket

**URL:** <https://discuss.elastic.co/t/cardinality-adding-missing-documents-to-a-different-bucket/287439>\
**Category:** Elasticsearch\
**Tags:** elastic-stack-alerting\
**Created:** [October 22, 2021, 12:41pm UTC](https://discuss.elastic.co/t/cardinality-adding-missing-documents-to-a-different-bucket/287439 "2021-10-22T12:41:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ibulut](https://avatars.discourse-cdn.com/v4/letter/i/ac91a4/32.png) [@ibulut](https://discuss.elastic.co/u/ibulut)\
**Post date:** [October 22, 2021, 12:41pm UTC](https://discuss.elastic.co/t/cardinality-adding-missing-documents-to-a-different-bucket/287439/1 "2021-10-22T12:41:18Z")

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Hello everyone. I'm beginner with little experience and currently trying to gain experience with experiments. I have a problem with cardinality aggregation.  
When cardinality is used, it ignores docs with missing values but if you use "missing":"N/A" line it treats them as if they have a value and puts all to the same bucket.  
So my question is can i create a separate bucket to put docs that have a missing value? The reason why I am doing this is to separate the docs and finding docs with missing values. I'm trying to create a watcher to notify me when docs missing values.

I don't know if I put my thoughts correctly but any help is welcomed. Thanks in advance.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 19, 2021, 12:42pm UTC](https://discuss.elastic.co/t/cardinality-adding-missing-documents-to-a-different-bucket/287439/2 "2021-11-19T12:42:05Z")

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