Item_Tree

Technical (archive)
1

Hi all,
Where can I use an Item_Tree class? There are some existing Item-Tree s that I want to reuse, but it sounds that I cannot embed them in observation,sections or clusters. What’s the aim of creating Item_Tree?

Regards
Pariya

MSc; PhD Candidate
Department of Computing Science and Engineering
Chalmers University of Technology
http://www.chalmers.se/cse/EN/people/kashfi-hajar

2

Item_Tree contain the core elements to be used by Action and Instruction archetypes. For example the data requirements for ordering medication (Instruction) are identical to those required for recording the administration of the medication (Action) such as name, dose, duration, frequency etc, so Action & Instruction archetypes should be composed of an embedded Item_Tree archetype.

Denis B Hutchinson

Data Content Modeller

Data Standards and Products

NHS Connecting for Health

www.connectingforhealth.nhs.uk

3

Hi Pariya,

I agree with Denis’s description of the use of Item_tree archetypes, as embedded archetypes which act as the whole contents of a parent archetypeand can be reused in a different parent archetype, Medication being the best example.

We are finding that it is much more common to want to reuse only parts of an archetype and I think you might be better to think of using CLUSTER archetypes.

I am currently working on some lab_test archetypes and have developed a CLUSTER.specimen archetype which is reused within archetype slots in a number of different lab-related archetypes, and in different slots within the same parent archetype: this reflects different relationships of specimen descriptions to the lab_test result - sometimes the specimen relates to the whole test and sometimes to a partial sun-result.

Ian

Dr Ian McNicoll
office / fax +44(0)141 560 4657
mobile +44 (0)775 209 7859
skype ianmcnicoll
ian@mcmi.co.uk

Clinical Analyst Ocean Informatics ian.mcnicoll@oceaninformatics.com
BCS Primary Health Care Specialist Group www.phcsg.org

2009/6/2 Hutchinson Denis (NHS Connecting for Health) <denishutchinson@nhs.net>

4

Ian McNicoll wrote:

We are finding that it is much more common to want to reuse only
*parts* of an archetype and I think you might be better to think of
using CLUSTER archetypes.

That's true, Ian, but it doesn't really explain why you're not allowed
to embed an Item_tree into a CLUSTER (or into any other type of
archetype, for that matter) if the need arises.

- Peter