# Triggering behaviour

**Category:** [Technical (archive)](https://discourse.openehr.org/c/technical-archive/156)
**Created:** 2012-08-14 06:55 UTC
**Views:** 3
**Replies:** 1
**URL:** https://discourse.openehr.org/t/triggering-behaviour/14240

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## Post #1 by @Isaac_Lamb

Hi All,

I have a question regarding triggering behaviour based on data captured via archetypes / templates.

In the openEHR Architecture Overview document, the following extract seems to indicate this has been considered in the openEHR specification.

“Clearly applications cannot always be totally generic (although many data capture and viewing applications are); decision support, administrative, scheduling and many other applications still require custom engineering. However, all such applications can now rely on an archetype- and template driven computing platform.”

When developing an openEHR system, how can decision support and the other actions mentioned above be implemented when there is no way to know which archetypes / templates will be used in the final system?

Kind Regards,

Isaac Lamb

Software Developer

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## Post #2 by @system

Hi Isaac

Just saw your post. The triggering rules could be based on the reference model alone but would be largely to do with access notification or the like - e.g. if the same user saves or reads more than 20 EHRs in an hour to stop the user access. All clinically oriented business rules need to be based on AQL and DO need to know what archetypes are involved - but not at the time of creating the system. These rules can be written when and as needed.

Cheers, Sam

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**Canonical:** https://discourse.openehr.org/t/triggering-behaviour/14240
**Original content:** https://discourse.openehr.org/t/triggering-behaviour/14240