1. http://www.hl7.org.uk HL7 V2 and V3 – where next? Charlie McCay HL7UK Chair-elect Charlie@RamseySystems.co.uk

2. Charlie McCay 12 April 20052/25 Charlie McCay Interest in Clear and Testable specifications Chair Elect HL7UK Co-chair XML and Implementation groups in HL7.org Consult for NPfIT and others Speaking as myself (and for HL7UK)

3. Charlie McCay 12 April 20053/25 Topics HL7 Data Items and Technology V2 V3 What to do now

4. Charlie McCay 12 April 20054/25 How HL7 works HL7.org and HL7UK… Products… Organisation… Meetings… Ballots…

5. Charlie McCay 12 April 20055/25 HL7.org and HL7UK Membership organisations Both aim to provide standards that support Clinical Information System Interoperability HL7UK does this in a UK context

6. Charlie McCay 12 April 20056/25 HL7 Products Specifications –V2, V3, CDA, Arden, CCOW, … –Informative, Normative or Reference Methods for developing specifications –MDF, HDF, …

7. Charlie McCay 12 April 20057/25 HL7 Organisation ANSI, ISO, CEN TCs, SIGs and others –Technical Committees –Special Interest Groups HL7.org, and the affiliates

8. Charlie McCay 12 April 20058/25 HL7 Meetings Working Group Meetings –Three meetings a year, 4-500 attendees –Committee work and tutorials Harmonisation –Three times a year, 40 attendees Conference calls, Mailing lists

9. Charlie McCay 12 April 20059/25 HL7 Ballots Central and Affiliate Committee and Membership Joining ballot pools, and meaning of votes Resolution of negatives

10. Charlie McCay 12 April 200510/25 Topics HL7 Data Items and Technology V2 V3 What to do now

11. Charlie McCay 12 April 200511/25 Data items and Technology “Semantics” is the definition of the data items that are permitted in the message –this is HL7 core business “Technology” is what is used to transmit that meaning between systems –HL7 is a convenient place to share best practice

12. Charlie McCay 12 April 200512/25 Topics HL7 Data Items and Technology V2 V3 What to do now

13. Charlie McCay 12 April 200513/25 V2 – what it looks like MSH|^&~\|HIS|HSP1|BEDMGMT|HSP1|200105311136||RSP^Znn ^RSP_Q11|1|P|2.4| MSA|AA|8699| QAK|1022|OK| Znn^Find Location^HL70471|1|1|0 QPD|Znn^Find Location^HL70471|1022|LOC^Location Master^HL70175|HSP1|2N^101^^HSP1 MFE|MAD|||2N^101^^HSP1|PL LOC|2N^101^^HSP1|Station 2 North, room 101|R||(407)804- 5000||IVP|P LCH|2N^101^^HSP1|||PRL^Privacy level^HL70324|S^Semi- private room^HL70262 LCH|2N^101^^HSP1|||SMK^Smoking^HL70324|Y^^HL70136

14. Charlie McCay 12 April 200514/25 V2 Widely used in secondary care Implementation-specific profiles Used for “within institution” messaging Messaging workbench for profiles |^ and XML representations

15. Charlie McCay 12 April 200515/25 History revisited V2 messages defined “as needed” Limited depth because of the encoding Implicit groupings Ugly datatypes “Z” segments

16. Charlie McCay 12 April 200516/25 Topics HL7 Data Items and Technology V2 V3 What to do now

17. Charlie McCay 12 April 200517/25 HL7 V3 What it looks like… Background… Cascade of Models… Implementation Technology Specification…

18. Charlie McCay 12 April 200518/25 V3 – what it looks like

19. Charlie McCay 12 April 200519/25 Background to V3 Moving out of the hospital Too many committees Richer data structures - Models Changing technology Not just messaging

20. Charlie McCay 12 April 200520/25 Cascade of Models RIM LabPharmacy Medical Records

21. Charlie McCay 12 April 200521/25 Implementation Technology Specification Abstract definitions as XML (MIF) XML first ITS off the block … Java SIG for internal application interfaces Other possibilities –HOM – HL7 Object Model ? –???

22. Charlie McCay 12 April 200522/25 XML Defined and Validated ITS defines the set of valid instances Schemas and other tools test conformance Validation tools will improve Schemas generated using XSLT Different flavours of Schema could be done Other validation tools

23. Charlie McCay 12 April 200523/25 Topics HL7 Data Items and Technology V2 V3 What to do now

24. Charlie McCay 12 April 200524/25 Where Next? National and local communications Maintain semantic mappings (expensive) Semantic migration harder than technical migration Collaboration for semantic mappings Sharing best practice Feedback on what helps and what does not

25. Charlie McCay 12 April 200525/25 Products Implementation Resource Kit Evolution of UK HL7 (V2 and V3) standards Frequently asked Questions What else do you need?