# What's the use-case for having multiple children in a parent-child index?
**URL:** https://discuss.elastic.co/t/whats-the-use-case-for-having-multiple-children-in-a-parent-child-index/157633
**Category:** Elasticsearch
**Created:** [November 21, 2018, 7:09am UTC](https://discuss.elastic.co/t/whats-the-use-case-for-having-multiple-children-in-a-parent-child-index/157633 "2018-11-21T07:09:34Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Ben\_Weisburd](https://discuss.elastic.co/u/Ben_Weisburd)
#### Post date: [November 21, 2018, 7:09am UTC](https://discuss.elastic.co/t/whats-the-use-case-for-having-multiple-children-in-a-parent-child-index/157633/1 "2018-11-21T07:09:34Z")
What are the practical use-cases where multiple kinds of child-docs would be useful?
[https://www.elastic.co/guide/en/elasticsearch/reference/current/parent-join.html#\_multiple\_children\_per\_parent](https://www.elastic.co/guide/en/elasticsearch/reference/current/parent-join.html#_multiple_children_per_parent)
Is it possible to perform bulk operations on children of a particular type - for example delete all "comment" children while leaving all "answer" children?
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [December 19, 2018, 7:09am UTC](https://discuss.elastic.co/t/whats-the-use-case-for-having-multiple-children-in-a-parent-child-index/157633/2 "2018-12-19T07:09:38Z")
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