Implementation FAQ

There are a considerable number of implementations of HL7 version 3 based on a Development Edition, a Normative Edition (e.g. 2005) or a Project Specific Edition (e.g. the NHS). This document aims to describe the most important lessons learned from these early implementations, as well as some of the frequently aksed questions related to the implementation of HL7 version 3.

As with all FAQs some of the questions or responses may sound "obvious" to you; this may not necessarily be true for other implementers.

The current question/issue has been organized into a number of categories, mainly in order to limit the size of the individual pages:

• Implementer Organization
• Interface Development
• Interface Deployment
• Framework Issues (national/regional infrastructures)
• Migration from version 2

The remainder of this page contains a number of new questions/issues that have not been moved to one of the above pages yet. Please add any new questions or issues below, especially if you're not sure (yet) in which of the above categories it should be.

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Source and target systems lack rich semantics

Black and white TV to HDTV to black and white

If both the sending as well as the reciving system are "semantically challenged" then this'll need to be addressed first. Introducing v3 in such an environment doesn't add any benefit. Rene spronk 06:21, 26 May 2006 (CDT)

Unless there is a long term plan to evolve the systems to be more semantically rich -- thus there is a good case for introducing the V3 communications infrastructure using simple flows first (where other approaches would also have worked), IF there is a strategy to introduce richer flows and application functionality in due course. Charliemccay 04:06, 2 Jun 2006 (CDT)

version 3 documentation not as easy to use as V2 documents

In v2.3.1 as a PDF -- one big document and using the find button is a great way to find what you want. This is particularly good as a single document.

It would seem the implementers need to press Pubs/tooling somewhat harder to get a search option in the standard publication. This has been discussed before as far as I know, but the timing of such a sloution is unclear. Rene spronk 12:46, 21 May 2006 (CDT)

fill the blanks transforms

V3 startup for implementers can be done by creating “fill the blanks” transforms.

This is very pragmatic. I'm not aware that this approach is being addressed in any of the implementation oriented Tutorial. It probably needs to be discussed, as quick-and-dirty implementation methods tend to be used more than theoretically flawless implementations... Rene spronk 12:59, 21 May 2006 (CDT)

V2 implementation profiles are easy to read

It is

What does this mean for v3 implementations? We just have to make sure v3 implementation guides are easy to read. Rene spronk 12:49, 21 May 2006 (CDT)

get some example implementation guides on the wiki

Good idea, the only ones I have on offer are however in Dutch. The use of a Realm-specific language is one of the key features of an implementation guide. Rene spronk 12:57, 21 May 2006 (CDT)