# Compile a category hierarchy list from several different such hierarchies

**URL:** <https://discuss.elastic.co/t/compile-a-category-hierarchy-list-from-several-different-such-hierarchies/225696>\
**Category:** Elasticsearch\
**Created:** [March 30, 2020, 2:34pm UTC](https://discuss.elastic.co/t/compile-a-category-hierarchy-list-from-several-different-such-hierarchies/225696 "2020-03-30T14:34:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Catalin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/catalin/32/65314_2.png) [@Catalin](https://discuss.elastic.co/u/Catalin)\
**Post date:** [March 30, 2020, 2:34pm UTC](https://discuss.elastic.co/t/compile-a-category-hierarchy-list-from-several-different-such-hierarchies/225696/1 "2020-03-30T14:34:57Z")

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My final goal is to create the most relevant category hierarchy steaming from several different such hierarchies.

But for a first step, being given a number of lists each containing 1 or more categories, I'd like to create a new list which contains the terms which are the most relevant across all individual lists. The categories from different lists may be the same or different, contain more or less keywords.

```
List1 List2 List3 => Resulting List
------------------------------------
Categ_1 Categ_A Categ_a Categ_1
Categ_2 Categ_B Categ_b Categ_b
... ... ... ...
Categ_8 Categ_X Categ_t Categ_5

```

Any ideas where to start ?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [April 27, 2020, 2:35pm UTC](https://discuss.elastic.co/t/compile-a-category-hierarchy-list-from-several-different-such-hierarchies/225696/2 "2020-04-27T14:35:02Z")

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Closed on April 27, 2020, 2:35pm UTC

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