# Get value out of key from document
**URL:** https://discuss.elastic.co/t/get-value-out-of-key-from-document/142701
**Category:** Logstash
**Created:** [August 2, 2018, 7:37am UTC](https://discuss.elastic.co/t/get-value-out-of-key-from-document/142701 "2018-08-02T07:37:55Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@JPelastic](https://discuss.elastic.co/u/JPelastic)
#### Post date: [August 2, 2018, 7:37am UTC](https://discuss.elastic.co/t/get-value-out-of-key-from-document/142701/1 "2018-08-02T07:37:56Z")
Hi
I don't understand the filter possibilities yet:
I have output documents
> {
> "xml" =\> "some xml here",
> "@timestamp" =\> some date here,
> "@version" =\> 1
> }
This is my filter - the input is not important. What I want is to put the xml field from my document through the xml-filter to parse the xml to json (which happens automatically with the xml filter).
> filter{
> xml {
> source =\> "message"
> target =\> "chambers"
> }
> }
> output { stdout{ } }
So how do I address this xml field?
---
### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [August 2, 2018, 7:45am UTC](https://discuss.elastic.co/t/get-value-out-of-key-from-document/142701/2 "2018-08-02T07:45:53Z")
The xml filter's `source` option should contain the name of the field containing the XML you want to parse.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 30, 2018, 7:45am UTC](https://discuss.elastic.co/t/get-value-out-of-key-from-document/142701/3 "2018-08-30T07:45:57Z")
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