Hi Silje,
On 10/11/2017 08:47, Bakke, Silje Ljosland wrote:
Crossposting this between the clinical and implementers lists, since
it belongs in both:
In some archetypes, one or more elements are set as mandatory
(typically occurrences 1..1 or 1..*), because the rest of the concept
makes no sense without this particular element recorded. Examples are
Problem/diagnosis name in Problem/diagnosis, and Temperature in Body
temperature. This is not intended to mean that it’s mandatory to enter
data into the element in a UI, but that this particular element is
mandatory in any persisted composition that uses the archetype.
and that it should have a value, but the value may be derived by other
means, e.g. a default value, or just set to 0 or other equivalent.
Recently however, we received a request to change the Head
circumference element in the Head circumference archetype from 1..1 to
0..1 because the element being mandatory in the archetype
automatically made the UI form builder mandate the entering of data
into the UI field, and removing the archetype on the fly made more
unnecessary clicks.
I'm not sure I understand; what was the reason the head circumference
should not have been visible on the form? A value doesn't have to be
entered; the form can use default value or current value pre-fill.
In a fit of mental hiccups, I agreed with and performed this change,
but have since realised this is wrong, because:
·A mandatory archetype element is not the same as a mandatory UI field
·A mandatory UI field is more like a field where you only allow
persisting non /null/ values, while a mandatory archetype element can
be persisted with a /null/ value without a problem.
well it depends on what you mean by a 'null' value; in mainstream
programming languages, this means /no value/, i.e. nothing. This is not
the same thing as an empty string or zero-valued number.
What does 'a mandatory UI field' mean? It could mean:
* must be displayed and filled
* must be displayed; will be prefilled in some way and may be
optionally filled by the user
How are implementers actually handling this? Do you separate UI field
mandation and archetype element mandation?
Kind regards,
*Silje Ljosland Bakke*
**
--
Thomas Beale
Principal, Ars Semantica <http://www.arssemantica.com>
Consultant, ABD Team, Intermountain Healthcare
<https://intermountainhealthcare.org/>
Management Board, Specifications Program Lead, openEHR Foundation
<http://www.openehr.org>
Chartered IT Professional Fellow, BCS, British Computer Society
<http://www.bcs.org/category/6044>
Health IT blog <http://wolandscat.net/> | Culture blog
<http://wolandsothercat.net/>
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