# How to use/define new source formats?
**URL:** https://forum.qiime2.org/t/how-to-use-define-new-source-formats/4716
**Category:** User Support
**Created:** [June 25, 2018, 7:18pm UTC](https://forum.qiime2.org/t/how-to-use-define-new-source-formats/4716 "2018-06-25T19:18:23Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@adoloman](https://forum.qiime2.org/u/adoloman)
#### Post date: [June 25, 2018, 7:18pm UTC](https://forum.qiime2.org/t/how-to-use-define-new-source-formats/4716/1 "2018-06-25T19:18:23Z")
Are those --source-format files even usable for our own data??
For example, if importing demultiplexed data (just paired-end fastq files) following "Casava" part of the importing manual, there is a --source-format with "Casava" in it.
How can I modify it for my own needs???
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### Author:  [@thermokarst](https://forum.qiime2.org/u/thermokarst)
#### Post date: [June 27, 2018, 12:27pm UTC](https://forum.qiime2.org/t/how-to-use-define-new-source-formats/4716/2 "2018-06-27T12:27:06Z")
3 off-topic replies have been merged into an existing topic: [Importing the demultiplexed merged data](https://forum.qiime2.org/t/importing-the-demultiplexed-merged-data/4735)
Please keep replies on-topic in the future.
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### Author:  [@thermokarst](https://forum.qiime2.org/u/thermokarst)
#### Post date: [June 27, 2018, 12:27pm UTC](https://forum.qiime2.org/t/how-to-use-define-new-source-formats/4716/3 "2018-06-27T12:27:06Z")