# Index Structure for Nested Data
**URL:** https://discuss.elastic.co/t/index-structure-for-nested-data/21369
**Category:** Elasticsearch
**Created:** [December 23, 2014, 11:14am UTC](https://discuss.elastic.co/t/index-structure-for-nested-data/21369 "2014-12-23T11:14:59Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Sameer\_Soni](https://discuss.elastic.co/u/Sameer_Soni)
#### Post date: [December 23, 2014, 11:14am UTC](https://discuss.elastic.co/t/index-structure-for-nested-data/21369/1 "2014-12-23T11:14:59Z")
Hi Guys,
This question may have been asked before, but I couldn't find relevant
answer so I am asking here.
I have a collection of Books, and each Book has contents composed in
Chapters & Non-Chapters.
I want to index these Books with contents and identify the content type, ie
is it Chapter & Non-Chapter.
Finally, for each query, I want to filter search results based on number of
matching books, and each individual result should contain matching Chapter
& Non-Chapter only.
For example, always 10 matching books are returned, and each result has
collection of matched Chapter & Non-Chapters.
I identify each chapter and non-chapter by specific ids and they belong to
a book which also has unique id.
Can somebody guide me as to how should I index my data, and construct
query, so that most relevant results are returned.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 12:42am UTC](https://discuss.elastic.co/t/index-structure-for-nested-data/21369/2 "2017-07-06T00:42:13Z")