# Comments on "Terminologies in Information models", anyone?

**Category:** [Clinical (archive)](https://discourse.openehr.org/c/clinical-archive/153)
**Created:** 2019-10-11 13:08 UTC
**Views:** 4
**Replies:** 1
**URL:** https://discourse.openehr.org/t/comments-on-terminologies-in-information-models-anyone/14430

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## Post #1 by @system

My thoughts:
- The picture is not wrong
- It needs more detail:
- Codes from codings systems are used in structures
- Ontologies are the ‘best’ coding systems, derived classifications are ‘good’ as well
- In structures codes are used in two ways: to give meaning to nodes in the structure, as
And to give meaning to the data fields in the structure.
-Since both codes and structures can give (i) meaning to concepts problems can occir (the Boundary Problem)
Additional rules how to use the structure and codes used are needed: Rule 1: Only basic (primitive) codes from a coding systems are allowed.
e.g. Code allowed for: 'Mamma tumor' but not a code for 'Mamma tumor not found’
Perhaps more rules are needed.
In CIMI/HL7 there was/is and agreement to use LOINC codes to express the question and SNOMED to be used to provide the answer.

Gerard Freriks
+31 620 34 70 88
‭+31 182 22 59 46‬
[gfrer@luna.nl](mailto:gfrer@luna.nl)

Kattensingel 20
2801 CA Gouda
the Netherlands

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## Post #2 by @system

Hi Verbjorn,

I am going back through various recent posts on the lists, and suggest that you might be interested to repost this one on the [Discourse server clinical list](https://discourse.openehr.org/c/clinical).

- thomas

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**Canonical:** https://discourse.openehr.org/t/comments-on-terminologies-in-information-models-anyone/14430
**Original content:** https://discourse.openehr.org/t/comments-on-terminologies-in-information-models-anyone/14430