Multiple parents and max number of nested specialized archetypes?
Dear Graham, Is multiple inheritance in the use case you presented, the only solution? I expect it is not. So why use it. When 'data integrity' is a recurring issue in several archetypes, re- use by inclusion of a 'data integrity' archetype in an other archetypes is a better other solution. I'm not closely following HL7 Templates. Are the HL7 Templates a separate and diverging piece of work when compared to EN13606-2 or harmonising? Do both the HL7 Templates and CEN Archetypes share identical requiremenets? Gerard -- private -- Gerard Freriks, MD Huigsloterdijk 378 2158 LR Buitenkaag The Netherlands T: +31 252544896 M: +31 620347088 E: gfrer at luna.nl Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety. Benjamin Franklin 11 Nov 1755 On Oct 16, 2007, at 11:44 PM, Grahame Grieve wrote: The use case is relatively simple in concept - allowing multiple inheritance would allow me to cross-cut concerns. I could write an archetype that only dealt a narrow aspect of an information structure, such as data integrity issues, and then use it across multiple archetypes, letting them focus on the big picture, not the minutiae of data integrity, which is mostly overlooked but ubiquitiously present. -- next part -- An HTML attachment was scrubbed... URL: http://lists.openehr.org/mailman/private/openehr-technical_lists.openehr.org/attachments/20071017/d5d147e3/attachment.html
Multiple parents and max number of nested specialized archetypes?
Grahame Grieve wrote: At the moment we have not seen any need for multiple inheritance in archetypes. I see this as very similar to multiple inheritance in objects. There is no *need*, but there is useful things that can be done. The question is whether the price is justified. The use case is relatively simple in concept - allowing multiple inheritance would allow me to cross-cut concerns. I could write an archetype that only dealt a narrow aspect of an information structure, such as data integrity issues, and then use it across multiple archetypes, letting them focus on the big picture, not the minutiae of data integrity, which is mostly overlooked but ubiquitiously present. Hi Grahame, in openEHR at least, data integrity is not defined or solved by archetypes - it is in the reference model. - thomas
Multiple parents and max number of nested specialized archetypes?
Hi Koray, A practical example of 'C' that is currently in the archetype repository is the Histological Diagnosis archetype - openEHR-EHR-EVALUATION.problem-diagnosis-histological.v1.ad Problem -- specialised to Diagnosis -- specialised to Histological Diagnosis - all of which are in the 'Specialisation' field of the Archetype Editor. There is no technical limit on the number of specialisations - but from my experience so far, it will be uncommon to have to specialise more than twice. The modelling required to work out the parent, and then each layer of children becomes increasingly complex and time-consuming, reconciling back up to the parent once the lowest level of child requirements has been captured - I have experimented initially with mindmapping for these problems. To date they have been mainly related to principles of inspection and palpation in cluster archetypes focused on capturing examination for re-use eg an initial generic inspection cluster, specialised to inspection of skin, to inspection of a wound or inspection of a rash. Regards Heather _ Dr Heather Leslie Director of Clinical Modeling Ocean Informatics M +61 418 966 670 (in Australia) M +44 7722 064 546 (in UK) Skype - heatherleslie -Original Message- From: openehr-technical-bounces at openehr.org [mailto:openehr-technical- bounces at openehr.org] On Behalf Of Koray Atalag Sent: Tuesday, 16 October 2007 4:34 PM To: openehr-technical at openehr.org Subject: Multiple parents and max number of nested specialized archetypes? Hi, I have a question about the referencing of archetypes in specialization. And also want to know if there is a limit on the number of specializations of archetypes. For example: A is top level archetype B is specialization of A C has to further specialize B and there is possibility that D also has to further specialize C and so on. So in theory all childs have to conform to A. But the question is in C which archetype will be written in 'specialize' section? A or A B ? I assume it is currently B. But in theory, possible one in a million, a particular specialized archetype might conform to multiple parents...In my opinion this is perfectly possible. So what happens? The other question is whether ADL or other limits the number of specializations. Best regards, Koray Atalag, MD, Ph.D. Freelance consultant and developer http://koray.pathos-web.org skype: atalagk _ ___ Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us. http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 ___ openEHR-technical mailing list openEHR-technical at openehr.org http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical __ NOD32 2594 (20071016) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com
Multiple parents and max number of nested specialized archetypes?
Andrew Patterson wrote: I should note that in the next generation of archetypes and tooling, archetype 'source' files for specialised archetypes will be 'differential' in nature - i.e. valid ADL, but containing only added and changed items from the parent, just as for subclasses in an object-oriented programming environment. This is excellent news - I was going to launch into a tirade this afternoon about how archetype specialisation requires repeating the whole parent definition, and how much more robust OO subclassing is because of the differential nature! Good thing I held off on my venting.. :) we have actually generated differential form archetypes - we are now adjusting some of the parser semantics, since now it has to check up the specialisation lineage for codes and a few other things, not just in the current archetype. A few weeks away from being solid I would say. Also, the ADL workbench now works more like a compiler - you can see what is compiled, what is not, and quickly reload anything already compiled. A while back there was talk of a confluence wiki being set up for storing of some of these thoughts?? Is anything happening in that area? I can help out if any admin is required - I just installed Jira and Confluence on my own machines.. they are both going - as is the new website. All will be available very soon. For confluence, we will ust put in some minimal structure to save us from complete disorganisation - it will be an open wki. There will be plenty of opportunity for experts here to contribute and help shape these things - we just want them running in a basic reasonable form so people don't hate us when they see it ;-) - thomas beale
