# Fun with Path Hierarchy Tokenizer

## Use Cases

Here are questions and scenarios from folks trying to use it:

1. [How do I index hierarchical data?](https://discuss.elastic.co/t/how-do-i-index-hierarchical-data/55643)
2. [Terms aggregation query performance slow](https://discuss.elastic.co/t/terms-aggregation-query-performance-slow/55542)
3. [Denormalization and Concurrency ](https://www.elastic.co/guide/en/elasticsearch/guide/current/denormalization-concurrency.html)
4. [Employee Hierarchy Usecase](https://discuss.elastic.co/t/employee-hierarchy-usecase/29859)
5. [Match against stored wildcard string](https://discuss.elastic.co/t/match-against-stored-wildcard-string/34725)
6. [Domain name analyzer/tokenizer](https://andrewwhitby.com/2014/11/23/domain-name-analyzer-with-elasticsearch/)
7. [Performance impact of the "include/exclude" fields of an aggregation](https://discuss.elastic.co/t/performance-impact-of-the-include-exclude-fields-of-an-aggregation/36969/4)
8. [Aggregation on a materialized path](https://discuss.elastic.co/t/aggregation-on-a-materialized-path/36519/2)
9. [An elasticsearch plugin to create hierarchical aggregations](https://github.com/opendatasoft/elasticsearch-aggregation-pathhierarchy)
10. [Parent child deep level hierarchy](https://discuss.elastic.co/t/parent-child-deep-level-hierarchy/37910)
11. [Add folderdepth in Path\_hierarchy](https://discuss.elastic.co/t/add-folderdepth-in-path-hierarchy/41991)
12. [Structuring data for hierarchy](https://discuss.elastic.co/t/structuring-data-for-hierarchy/45356/2)
13. [Elasticsearch - using the path hierarchy tokenizer to access different level of categories](http://stackoverflow.com/questions/24819234/elasticsearch-using-the-path-hierarchy-tokenizer-to-access-different-level-of)
14. [Question about custom analyzer](https://discuss.elastic.co/t/solved-question-about-custom-analyzer/48680/6)
15. [Path\_hierarchy with custom delimiter fails when values starts with a number](https://discuss.elastic.co/t/path-hierarchy-with-custom-delimiter-fails-when-values-starts-with-a-number/53193)
16. [Wild card or pattern in Kibana query?](https://discuss.elastic.co/t/wild-card-or-pattern-in-kibana-query/54108)