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| Re: [mdht-dev] Proposed new capability | 
In my opinion, a more straight forward solution would be to offer a new logical constraint kind, like "NotEqual", that
constrains the property and can take multiple string values that constitute the pool of disallowed values for the property.
The UI could function like this:
*in case of a ValueSet constrained property: offer values from this ValueSet to be chosen by the user as forbidden value(s)
*in case of enumeration typed property: offer literals from the enumeration to be chosen by the user as forbidden value(s)
*in case of string typed property: free-text fields to be edited by the user as forbidden value(s)
This solution has the advantage of not dealing with new severity values and handling not only terminology properties. 
David Cai <David.Cai@xxxxxxxxxxxx> hat am 8. Juni 2016 um 03:04 geschrieben:
Hi Sean,
 
Thanks for the confirmation.
 
Cheers
David
 
From: mdht-dev-bounces@xxxxxxxxxxx [mailto:mdht-dev-bounces@xxxxxxxxxxx] On Behalf Of Sean Muir
 Sent: Wednesday, 8 June 2016 10:21 AM
 To: mdht developer discussions <mdht-dev@xxxxxxxxxxx>
 Subject: Re: [mdht-dev] Proposed new capability
 
Yes we would need to have separate levels for code system and values 
we have need to support multiple terminology constraints 
so need to combine the effort 
 
The proposed solution would need to have separate severities for Code System and Value Set validation (and possibly Concept Domain). At the moment you can only have a single Terminology Validation severity set in the CDA Tools tab.
            I think this should not be to difficult and extension using existing structures - if we modify the terminology constraint logic to interpret the shall not to generate the appropriate ocl and dita
            so create a value set with values, set the value set constraint on the attribute, set it to SHALL NOT in the severity
Currently you can prohibit an element by setting severity to SHALL and multiplicity to [0..0]. The constraint in DITA will come out as …SHALL NOT contain xxx [0..0].
The proposed new capability will extend the “SHALL NOT” capability to more than just multiplicity, but values. For example:
-          Modelling that statusCode SHALL NOT equal “ceased”
-          Modellign that code/@code SHALL NOT equal “02”
-          Modelling @nullFlavor SHALL NOT equal "NI", "UNK", "ASKU", "NAV", "NASK", "MSK", or "NA"
Currently this type of constraints are modelled via an ANALYSIS constraint and require custom OCL. It would make modelling a lot easier if this type of content can be set in the model. This type of constraint/validation may also extend to include SHALL, SHOULD, SHOULD NOT, and MAY.
Any comments will be appreciated.
David Cai
 Business Analyst
Strategy, Architecture & Informatics Group
 nehta - National E-Health Transition Authority 
 Office address
 Phone: (07) 3023 8598 
 Fax: (07) 3023 8466
 Email: david.cai@xxxxxxxxxxxx 
 Web: www.nehta.gov.au
 
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