‘Extending’ a ValueSet in a profile

July 20, 2017 Leave a comment

In the last post we talked about ValueSets and CodeSystems – and in particular how the ValueSet can be thought of as the set of possible values from one or more CodeSystems for a particular element in a given context.

As you know, the spec provides ValueSets and bindings for all coded elements, and a common need when profiling is likely to be to ‘extend’ the set of possible values – take the contents already in the ValueSet and add others. What’s the best pattern to do that?

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Filed under Code, terminology

‘Default’ namespaces in HL7 v2

July 20, 2017 3 Comments

So I had an interesting question this week about coded values when importing data from HL7 v2 messages into a data store, and then subsequently exporting them in FHIR interfaces.

The specific question was what should the ‘default’ namespace be when the namespace is not specified in the v2 message?

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Filed under Code, version 2

Terminology services

September 16, 2016 Leave a comment

Just a short post to call peoples attention to terminology services in FHIR. Rob Hausam (who co-ordinates the Terminology track at the connectathon) made the excellent comment in the Zulip chat that terminology is a ‘cross-cutting’ concern that can be integrated into many different applications – and tracks at connectathon.

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Processing FHIR Bundles using HAPI

August 18, 2014 7 Comments

A month or so back, we talked about a project we had to import glucose results into a repository using FHIR. That post was focused on using the transaction search facility to indicate that there was a resource in the bundle that may or may not exist on the server, and giving the search parameters for the server to use to make the determination. The example we looked at was the Patient resource – specifying the identifier value to use as the lookup.

We didn’t really talk about the other aspects of processing a bundle such as this, so let’s see how we can implement this scenario using the HAPI library.

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