# Archetype_id_constraint

**Category:** [ADL](https://discourse.openehr.org/c/adl/40)
**Created:** 2020-11-24 17:24 UTC
**Views:** 736
**Replies:** 5
**URL:** https://discourse.openehr.org/t/archetype-id-constraint/1118

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## Post #1 by @Bert_Verhees

Hi everybody, I am trying to find this ARCHETYPE_ID_CONSTRAINT class which is mentioned in AOM2. Does someone know in which specification it is?

Thanks very much in advance.

Best regards
Bert

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## Post #2 by @sebastian.iancu

[quote="Bert_Verhees, post:1, topic:1118"]
ARCHETYPE_ID_CONSTRAINT
[/quote]

Yes, I see it is missing - perhaps @pieterbos knows more here, he is now undergoing some work and re-arrangements of AOM2 specs.

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## Post #3 by @thomas.beale

This is an error I have created; give me a day or two to find and fix. Maybe tomorrow if I'm lucky!

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## Post #4 by @Bert_Verhees

;-)

Thanks again, Thomas

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## Post #5 by @thomas.beale

Now fixed (got delayed by the certificate problem) - [see here](https://specifications.openehr.org/releases/AM/latest/AOM2.html#_archetype_id_constraint_class).

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## Post #6 by @Bert_Verhees

:rocket:

Very fast response 

:weight_lifting_man:

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**Canonical:** https://discourse.openehr.org/t/archetype-id-constraint/1118
**Original content:** https://discourse.openehr.org/t/archetype-id-constraint/1118