# Essential Rm attributes - Implementation guideline

**Category:** [Specifications](https://discourse.openehr.org/c/specifications/6)
**Created:** 2024-03-26 15:45 UTC
**Views:** 278
**Replies:** 1
**URL:** https://discourse.openehr.org/t/essential-rm-attributes-implementation-guideline/5054

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## Post #1 by @mar.perezcolman

Hi all, 

In Wales, we are using openEHR as a structured clinical repository as part of our national platform, and we are trying to build a generic implementation guideline for any system in Wales aiming at storing data in our CDR.

We have established that we need three levels for any specific implementation guideline:
1) Required elements for the openEHR CDR.
2) Required/mandated data elements that are a Welsh standard. (eg: system
3) Specific Rm attributes  for each form (eg PARTICIPATIONS for an MDT)

I was wondering if anyone had a document, github repo, code, or any other format with the list of the essential Rm attributes to commit a composition and their tree structure so that we can review it. 

Our aim is to build a guideline to point developers from different applications (with their own form builders) to the correct place in the National CDR to store the Rm attributes data and avoid errors.

I am including @johnmeredith and @rach123 who are also working in this.

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## Post #2 by @SevKohler

You could check the generic mappers of my FHIR to openEHR ETL software. 
These usually cover the classical RM fields required for a composition. 
https://github.com/SevKohler/fhir-bridge/tree/develop/src/main/java/org/ehrbase/fhirbridge/ehr/converter/generic
The NameToName is FHIRType TO OpenEHRType ;) so for composition check *ToComposition.
These are the [ones](https://github.com/SevKohler/fhir-bridge/blob/develop/src/main/java/org/ehrbase/fhirbridge/ehr/converter/generic/CompositionConverter.java#L35) always required
Or you can also check what the implementers are defaulting for their flat formats, usually they prefill specific RM-fields to make the flat composition more readable.
ping @vidi42 @matijap

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**Canonical:** https://discourse.openehr.org/t/essential-rm-attributes-implementation-guideline/5054
**Original content:** https://discourse.openehr.org/t/essential-rm-attributes-implementation-guideline/5054