# New Python openEHR Synthetic Data Generator

**Category:** [Tools](https://discourse.openehr.org/c/tool-dev/36)
**Created:** 2026-03-02 12:14 UTC
**Views:** 53
**Replies:** 0
**URL:** https://discourse.openehr.org/t/new-python-openehr-synthetic-data-generator/11796

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## Post #1 by @Koray_Atalag

Howdy, my weekend hack turned into something I thought might be helpful to others running after test data - heaps of them!

https://github.com/atalagk/openEHR-Data-Generator

Project started from a fork of Berlin-Institute-of-Health / Genkidata ([https://github.com/Berlin-Institute-of-Health/Genkidata](https://github.com/Berlin-Institute-of-Health/Genkidata)). 
It has significant additions:

* instead of just duplicating existing Compositions, it uses:

  * An NLP library to change text to synonyms for DV_TEXT. While not perfect from a clinical semantics point of view, it's much better than lorem ipsum stuff!

  * For quantities it changes values randomly between -15 <> +15 percent so it's likely to be clinically plausable.

* in addition a new feature to create canonical Compositions from Webtemplates (it’s a biggie! and possibly still has errors but it passed all tests from ehrbase SDK test webtemplates using Pablo’s validation tool).

When you run the app, it prompts three options:

1. API Upload (into ehrbase or other CDR)

2. Jitter Existing Compositions (\\source_models\\compositions) but rather than just duplicating in the original app it creates new values)

3. Stored (Source Webtemplates)

Existing Compositions are taken from test data from [https://github.com/ehrbase/openEHR_SDK](https://github.com/ehrbase/openEHR_SDK) so they pretty much cover all possible variations.

The amount of Compositions and EHRs is defined by user input.

Resulting canonical Compositions are saved into:

> /dist/compositions

You can put your own Compositions (to duplicate but with new values) and Webtemplates into:

> /source_models/compositions
>
> /source_models/webtemplates

Enjoy! And comments / tickets / pull requests welcome.

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**Canonical:** https://discourse.openehr.org/t/new-python-openehr-synthetic-data-generator/11796
**Original content:** https://discourse.openehr.org/t/new-python-openehr-synthetic-data-generator/11796