# How to create GDL2 guideline based on ADL2 archetypes

**Category:** [REQUESTS](https://discourse.openehr.org/c/tool-requests/95)
**Created:** 2021-05-18 09:29 UTC
**Views:** 939
**Replies:** 5
**URL:** https://discourse.openehr.org/t/how-to-create-gdl2-guideline-based-on-adl2-archetypes/1560

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## Post #1 by @Rinke

Hi all,

Does anyone has experience with creating GDL2 files based on ADL2 archetypes. I tried doing this with the GDL2 editor, but it has a hard time interpreting the ADL2 archetypes created with the ADL workbench apps. Wondering if there are any othere tools I could use to achieve this. Or if I should just stick to ADL 1.4 Archetypes for now when wanting to create GDL2 files. 

Thanks!

Regards,
Rinke

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## Post #2 by @thomas.beale

I suspect for right now, you have to stick to ADL 1.4, but @rong.chen can advise better.

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## Post #3 by @Rinke

I assumed that. Thanks for the quick reply Thomas!

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## Post #4 by @joostholslag

How hard would it be to build adl2 support for gdl2? I’m interested in the features of gdl2. But building the engine is already quite a task I presume. Also having to build adl2 support will be quite a stretch, since we solve the simplest gdl usecases with adl rules right now.
Or is there an opensource (or commercially) available gdl engine?

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## Post #5 by @thomas.beale

Cambio has a commercial product. I think there may even be some nascent open source implementations as well. But you could start by bugging @rong.chen at Cambio CDS - he's the expert.

I would not have thought upgrading the Cambio tools and engine to ADL2 would be that big a deal - especially if they use Archie libs.

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## Post #6 by @rong.chen

ADL2 archetype support is on our roadmap for sure, and it will be quite straight forward to implement. Nearly all of our current development are still ADL1.4 based, I think the overall support for ADL2 need to catch up and it will take a while.

So for now, please use ADL 1.4 archetypes. If you don't know already, here you find nearly 600 examples of GDL2 guidelines and archetypes in our open source project, https://github.com/gdl-lang/common-clinical-models.

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**Canonical:** https://discourse.openehr.org/t/how-to-create-gdl2-guideline-based-on-adl2-archetypes/1560
**Original content:** https://discourse.openehr.org/t/how-to-create-gdl2-guideline-based-on-adl2-archetypes/1560