# openEHR-technical Digest, Vol 49, Issue 12 (ArchetypeNodeId of an archetypeslot)

**Category:** [Technical (archive)](https://discourse.openehr.org/c/technical-archive/156)
**Created:** 2011-05-03 11:52 UTC
**Views:** 13
**Replies:** 0
**URL:** https://discourse.openehr.org/t/openehr-technical-digest-vol-49-issue-12-archetypenodeid-of-an-archetypeslot/14008

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## Post #1 by @Mahdi_Asgari

Thanks sam

The main issues is how to apply constraint on Slots? Such as occurrence?

So if I used archetype_id instead of archetype_node_id, then how can I found correct Slot if more than one slot is used, to apply occurrence constraint?

I think I must test if archetype_id matches by Slot/include regular expression? So how to solve conflicts if archetype_id matches with two slot/include regular expression?

Is this a new issue? On validation RMObject via archetype ?

Thanks in advance

Asgari, mahdi

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**Canonical:** https://discourse.openehr.org/t/openehr-technical-digest-vol-49-issue-12-archetypenodeid-of-an-archetypeslot/14008
**Original content:** https://discourse.openehr.org/t/openehr-technical-digest-vol-49-issue-12-archetypenodeid-of-an-archetypeslot/14008