# Parsing non-JSON key - lists-of-values pairs
**URL:** https://discuss.elastic.co/t/parsing-non-json-key-lists-of-values-pairs/223956
**Category:** Logstash
**Created:** [March 17, 2020, 2:57pm UTC](https://discuss.elastic.co/t/parsing-non-json-key-lists-of-values-pairs/223956 "2020-03-17T14:57:24Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Antonio\_Bevilacqua](https://discuss.elastic.co/u/Antonio_Bevilacqua)
#### Post date: [March 17, 2020, 2:57pm UTC](https://discuss.elastic.co/t/parsing-non-json-key-lists-of-values-pairs/223956/1 "2020-03-17T14:57:24Z")
I am trying to parsing with a logstash filter the following pattern:
`[[k1, [ v11, v12, v13] ], [k2, [ v21] ], [k3, [v31, v32] ] ]`
This is a list of key value pairs with varying length, where the values are lists of varying lengths as well.
I would like to obtain an outpuyt where the keys are nested properties and the lists of values are interpreted as lists of values in elasticsearch.
I have looked around for a while but I couldn't understand how to do it with the built-in filters. It is not a JSON (no `""` around strings, no `{}`, no `:` ) format so it can't be done with the `json` filter, while I can't figure how to do it using the `kv` filter.
Do you have any advice for me?
Thanks
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 14, 2020, 2:57pm UTC](https://discuss.elastic.co/t/parsing-non-json-key-lists-of-values-pairs/223956/2 "2020-04-14T14:57:27Z")
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