# \#modelling-patterns **URL:** https://discourse.openehr.org/tag/modelling-patterns/23.md [Latest](https://discourse.openehr.org/latest.md) · [Categories](https://discourse.openehr.org/categories.md) · [Tags](https://discourse.openehr.org/tags.md) --- ## [On DV\_BOOLEAN choice fields and usage with null flavors](https://discourse.openehr.org/t/on-dv-boolean-choice-fields-and-usage-with-null-flavors/17102)
**Author:** [@Sidharth\_Ramesh](https://discourse.openehr.org/u/Sidharth_Ramesh)\ **Replies:** 10\ **Last updated:** [16 July 2026 10:59 UTC](https://discourse.openehr.org/t/on-dv-boolean-choice-fields-and-usage-with-null-flavors/17102 "2026-07-16T10:59:38Z")
I’m looking at a bunch of screening-style archetypes where a presence field (encodes boolean information) is modelled as a choice of: DV\_BOOLEAN, DV\_CODED\_TEXT, DV\_TEXT Some examples: openEHR-EHR-EVALUATION.pregnancy… --- ## [Representing event timelines using the history package](https://discourse.openehr.org/t/representing-event-timelines-using-the-history-package/11876)
**Author:** [@paul.behrend](https://discourse.openehr.org/u/paul.behrend)\ **Replies:** 11\ **Last updated:** [2 April 2026 10:14 UTC](https://discourse.openehr.org/t/representing-event-timelines-using-the-history-package/11876 "2026-04-02T10:14:09Z")
I’m trying to represent a timeline of past states (values of some attribute with validity time spans) within a composition. The RM spec contains a section on the history package containing classes that I believe match th… --- ## [Creating FHIR care plan in openEHR](https://discourse.openehr.org/t/creating-fhir-care-plan-in-openehr/3446)
**Author:** [@Ali\_Rahmani](https://discourse.openehr.org/u/Ali_Rahmani)\ **Replies:** 3\ **Last updated:** [13 January 2023 08:49 UTC](https://discourse.openehr.org/t/creating-fhir-care-plan-in-openehr/3446 "2023-01-13T08:49:42Z")
apologies! This is a beginner question. I am trying to model the FHIR care plan via openEHR archetypes/templates. as far as I know there is already care plan archetype, but that looks like an abstract container. So, I wa… --- ## [Modelling pattern - imaging examination - what do you think?](https://discourse.openehr.org/t/modelling-pattern-imaging-examination-what-do-you-think/2648)
**Author:** [@bna](https://discourse.openehr.org/u/bna)\ **Replies:** 40\ **Last updated:** [11 June 2022 10:29 UTC](https://discourse.openehr.org/t/modelling-pattern-imaging-examination-what-do-you-think/2648 "2022-06-11T10:29:36Z")
There is a new pattern in development for imaging examination. The pattern is based in specialisation. See the structure from this archetype: Clinical Knowledge Manager I am ambivalent. In many modelling situations I t… --- ## [Revisiting adverse reactions](https://discourse.openehr.org/t/revisiting-adverse-reactions/1855)
**Author:** [@siljelb](https://discourse.openehr.org/u/siljelb)\ **Replies:** 7\ **Last updated:** [12 December 2021 13:00 UTC](https://discourse.openehr.org/t/revisiting-adverse-reactions/1855 "2021-12-12T13:00:43Z")
The current Adverse reaction risk archetype was first published in March 2016 after a lengthy modelling and review process detailed in this blog post by @heather.leslie. The Adverse reaction risk archetype was always in… --- ## [Medication amounts and units](https://discourse.openehr.org/t/medication-amounts-and-units/1935)
**Author:** [@siljelb](https://discourse.openehr.org/u/siljelb)\ **Replies:** 15\ **Last updated:** [11 December 2021 10:55 UTC](https://discourse.openehr.org/t/medication-amounts-and-units/1935 "2021-12-11T10:55:17Z")
We should maybe revisit the current modelling patterns for medication amounts and their units. Currently, we have amounts expressed as a DV\_QUANTIY with units constrained to ‘1’, and an additional DV\_TEXT element for the… --- ## [Revisiting symptom/sign](https://discourse.openehr.org/t/revisiting-symptom-sign/1867)
**Author:** [@siljelb](https://discourse.openehr.org/u/siljelb)\ **Replies:** 47\ **Last updated:** [16 October 2021 22:57 UTC](https://discourse.openehr.org/t/revisiting-symptom-sign/1867 "2021-10-16T22:57:12Z")
The current Symptom/sign archetype was first published in October 2015 following a seven month review process. Since then the archetype has had several breaking changes applied, and has been sitting in the ‘Reassess’ st… --- ## [Revisiting medication summary / screening](https://discourse.openehr.org/t/revisiting-medication-summary-screening/1869)
**Author:** [@ian.mcnicoll](https://discourse.openehr.org/u/ian.mcnicoll)\ **Replies:** 2\ **Last updated:** [16 September 2021 11:27 UTC](https://discourse.openehr.org/t/revisiting-medication-summary-screening/1869 "2021-09-16T11:27:04Z")
I wonder if there is case for rationalising the current Medication summary archetype and Medication screening. THe use case we have from Wales, for a couple of different projects looks very like Summary - including episo… --- ## [References on modelling styles?](https://discourse.openehr.org/t/references-on-modelling-styles/766)
**Author:** [@siljelb](https://discourse.openehr.org/u/siljelb)\ **Replies:** 5\ **Last updated:** [11 June 2020 16:18 UTC](https://discourse.openehr.org/t/references-on-modelling-styles/766 "2020-06-11T16:18:40Z")
I’ve had a question from a colleague about scientific basis for modelling styles, which I had to say I don’t know of. The specific example was how to model a diagnosis with qualifiers, for example the diagnosis “renal tu… --- ## [Clinical scales - ordinal or coded text?](https://discourse.openehr.org/t/clinical-scales-ordinal-or-coded-text/709)
**Author:** [@siljelb](https://discourse.openehr.org/u/siljelb)\ **Replies:** 26\ **Last updated:** [27 May 2020 08:36 UTC](https://discourse.openehr.org/t/clinical-scales-ordinal-or-coded-text/709 "2020-05-27T08:36:48Z")
Starting with some definitions. These are not universal, but I’m using the words this way in this post: Clinical score: A multi-component clinical assessment tool that involves summing up the numerical values of a set … --- ## [DV\_CODED\_TEXT with open/extensible set of codes (value set)](https://discourse.openehr.org/t/dv-coded-text-with-open-extensible-set-of-codes-value-set/403)
**Author:** [@sebastian.garde](https://discourse.openehr.org/u/sebastian.garde)\ **Replies:** 29\ **Last updated:** [3 April 2020 16:01 UTC](https://discourse.openehr.org/t/dv-coded-text-with-open-extensible-set-of-codes-value-set/403 "2020-04-03T16:01:29Z")
I would like to pick up a discusssion we started in the ADL2 meeting last year in Braunschweig: We had another request (this time from HiGHmed) to support open/extensible set of codes in a DV\_CODED\_TEXT. In this case, … --- ## [Extra data elements in archetypes representing clinical scores and scales](https://discourse.openehr.org/t/extra-data-elements-in-archetypes-representing-clinical-scores-and-scales/299)
**Author:** [@siljelb](https://discourse.openehr.org/u/siljelb)\ **Replies:** 29\ **Last updated:** [5 February 2020 11:01 UTC](https://discourse.openehr.org/t/extra-data-elements-in-archetypes-representing-clinical-scores-and-scales/299 "2020-02-05T11:01:09Z")
In the recent review of the ACVPU scale archetype (https://ckm.openehr.org/ckm/archetypes/1013.1.3317), a question has arisen about whether we should add any extra data elements to this archetype or any other archetypes …