Frequency of use of HL7 message types
Publication date: Jul 24, 2012
If we were to create a diagram that depicts the frequency of the number of message types supported by software applications, what would it look like?
This is a relatively difficult question because of the lack of reliable data. After conferring with a number of knowledgeable implementers the shape of the diagram (not to any particular scale) is as follows:
HL7 version 2
The diagram shows that most applications support a certain number of HL7 v2 message types (or rather, trigger events). There are some applications that only support one or two message types, and there are a lower number of systems that support a very large number of message types.
The curve is not a Gaussian Bell curve: the two peaks in the curve reflect the fact that most applications are either ancillary/departmental applications (which support relatively few message types) or HIS/PAS and EHR applications (which have to support a larger number of message types). The value of X (as shown in the diagram) probably lies between 4 and 6, and Y between 15 and 25.
For an implementer the main element of re-use in HL7 version 2 is the segment. So what's the frequency of the number of segments supported by software applications?
Even a simple application that receives ADT messages has to support (however minimalistically) at least 3 segments (MSH, PID, PV1). The mean value probably lies around 15.
HL7 version 3 messaging
Note: this section focuses on HL7 version 3 messaging, and doesn't include CDA.
Diagram #1 shows that most applications support a certain number of HL7 v3 message types. There are some applications that only support one or two message types, and there are a lower number of systems that support a very large number of message types.
Given that HL7 version 3 messages tend to be used to support inter-organizational workflows (e.g. regional and/or national data exchanges) we again have two peaks: most applications are either used to support a smallish part of the workflow (and support relatively few message types) or they provide some kind of EHR-like functionality (a large number of message types).
The main element of re-use in HL7 version 3 messaging is either the message type itself (the R-MIM), or a RIM class. HL7 version 3 is based on a methodology (called MDF 99) whereby the message types are object oriented specializations of the reference information model (RIM).
However interesting these diagrams may be, the big question obviously is what conclusions one should or could draw from them, especially when it comes to the implementability of HL7 version 3 (and CDA). This will be the subject of an upcoming column.
PermaLink to this page: http://www.ringholm.com/column/HL7_message_types_per_system.htm
Index of columns:
- Creation and Curation of FHIR Profiles - process and governance (Dec 14, 2017)
- De Algemene Verordening Gegevensbescherming (AVG) in de zorg (Dutch, Sep 19, 2017)
- Impact of the GDPR on the use of interoperability standards (Jun 27, 2017)
- News from the FHIR DevDays in Amsterdam (Dec 15, 2016)
- Next XDS Release (Oct 27, 2016)
- Five years of FHIR (Aug 11, 2016)
- Interoperability projects in Ireland - FHIReland (Mar 14, 2016)
- 2016 FHIR Jedi Calendar (Jan 06, 2016)
- Top 10 HL7 videos watched in 2015 (Dec 24, 2015)
- Update from the trenches on CDA R2.1/R3 and HL7v2. (Oct 15, 2015)
- FHIR DevDays - UK GP System APIs (Sep 16, 2015)
- IHE XDS - testing and implementation tools (Aug 25, 2015)
- Most often implemented IHE Profiles (Jun 08, 2015)
- Why we sponsor the HL7 WGM (May 10, 2015)
- FHIR in Paris (Apr 21, 2015)
- Mapping HL7v2 messages to FHIR. (Apr 13, 2015)
- Analysis of CDA R2 testing tools - most requirements are neither tested nor respected. (Feb 13, 2015)
- HL7 and IHE in Sweden (Feb 08, 2015)
- 2015 FHIR Chiefs Calendar (Jan 07, 2015)
- The Merry FHIR Choir caroling the 12 Days of Christmas (Dec 09, 2014)
- Chicago FHIR Update (Oct 13, 2014)
- Internationalization of HL7 (Sep 25, 2014)
- New XDS Advanced training course on offer by IHE Services and IHE Academy (Jul 14, 2014)
- Recent and Future developments of the DICOM standard (Mar 06, 2014)
- Top 10 HL7 videos watched in 2013 (Jan 02, 2014)
- Report from the HL7 WGM in Cambridge (Oct 16, 2013)
- Documenting the history of HL7 (Sep 03, 2013)
- Histology Lab Device Automation using HL7 version 2 (Jul 23, 2013)
- HL7 FHIR Elevator Pitch (Jul 15, 2013)
- Interoperability Standards - the no-sales pitch (Jul 09, 2013)
- HL7 UK - new landscape, new opportunities (Jun 26, 2013)
- Validation and error correction at the IHE Connectathon (Apr 25, 2013)
- CDA Implementation Guides - (not) invented here (Apr 17, 2013)
- Usage of IHE Profiles (Feb 25, 2013)
- 10 year anniversary - Dutch Ringholm HL7 v2 training courses. (Feb 19, 2013)
- About IHE Academy and new IHE training courses (Jan 12, 2013)
- CDA implementation experiences in the UK (Dec 04, 2012)
- Musings on free HL7 IP (Oct 01, 2012)
- HL7 Connectathons (Sep 09, 2012)
- Renovate HL7 version 3 (Aug 03, 2012)
- Frequency of use of HL7 message types (Jul 24, 2012)
- Lighting the FHIR, HL7s new major interoperability standard (Jun 15, 2012)
- Reflections on the HL7 membership model - the affiliate life cycle (Dec 28, 2011)
- Thinking like an OWL reasoner (Sep 17, 2011)
- RFH (Resources for Health): HL7 version 3 taken to the next step (Aug 18, 2011)
- What's so great about the HL7 organization? (Aug 04, 2011)
- Kerndossier: een Nederlandse versie van CCD (Dutch, May 03, 2011)
- A HL7 RIMBAA update (Apr 21, 2011)
- Timezone Hotel (Mar 29, 2011)
- HL7 and openEHR are cooperating (finally) (Jan 21, 2011)
- Increasing demand for IHE training courses (Dec 18, 2010)
- Context issues with the IHE QED profile (Dec 15, 2010)
- The changing role of HL7 country organizations (Jul 16, 2010)
- Implementing HL7 version 3 - the book (May 06, 2010)
- Adding openness to a closed world (Feb 09, 2010)
- How to lower the hurdle for HL7 v3 implementers (Jan 21, 2010)
- HL7 v3 deployment statistics (Dec 17, 2009)
- There's Trouble in Paradigm (Sep 25, 2009)
- Internationalization of HL7 (Sep 24, 2009)
- HL7 UK signs deal with Ringholm to deliver HL7 v2/v3 training courses in London (Sep 17, 2009)
- The use of HL7 in South Africa (Aug 20, 2009)
- The Next Web Conference in Amsterdam (Apr 17, 2009)
- The HL7 UK AGM and RIMBAA (Apr 16, 2009)
- The HL7 Wiki reaches 2000 pages (Mar 02, 2009)
- The HL7 roadmap for CDA R3 and the CCD (Jan 17, 2009)
- HL7 Affiliates Meeting in Orlando (Jan 11, 2009)
- Swiss and Dutch HL7 News (Dec 31, 2008)
- Devices and Prizes (Nov 22, 2008)
- HL7 in Norway: a situation report (Sep 02, 2008)
- Russian whitepaper (Jul 09, 2008)
- The HL7 Interoperability Conference - IHIC 2008 (May 30, 2008)
- HL7 creates a RIM Based Application Architecture (RIMBAA) group (May 18, 2008)
- Notes from the HL7 WGM in Phoenix (May 08, 2008)
- Germany embraces CDA eReferral document specification (May 02, 2008)
- HL7 v3 RIM based applications: an unintended side effect (Jan 19, 2008)
- Collaborative Tools (Jun 21, 2007)
- HL7 ist Pflicht in der deutschen Telematikinfrastruktur (German, Mar 16, 2007)
- HL7 based Tree inventory system (Jan 30, 2007)
- The link between HL7 and Open Source Software (Jan 06, 2007)
- Workflow Bribery (Sep 15, 2006)
- Timezones in HL7 (Jan 23, 2004)
- Controlled vocabularies: "@*%!!!" ? (Sep 01, 2003)
- Trusting the other Party (Nov 01, 2002)
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Ringholm bv is a group of European experts in the field of messaging standards and systems integration in healthcare IT.
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