1 / 16

Introduction to HL7

Introduction to HL7. Charlie McCay Charlie@RamseySystems.co.uk. Charlie McCay. Interest in Clear and Testable specifications Co-Chair HL7 XML Special Interest Group Chair HL7UK Technical Committee XML input to these specifications: RACPC+PROFESS – CEN 13606 data-sets

ardelis
Download Presentation

Introduction to HL7

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction to HL7 Charlie McCay Charlie@RamseySystems.co.uk

  2. Charlie McCay • Interest in Clear and Testable specifications • Co-Chair HL7 XML Special Interest Group • Chair HL7UK Technical Committee • XML input to these specifications: • RACPC+PROFESS – CEN 13606 data-sets • GP2GP – early adopter for HL7V3 • ETP – Electronic Transfer of Prescriptions Pilot • DMSP Clinical pathways (HL7v3)

  3. How HL7 works • HL7.org and HL7UK… • Products… • Organisation… • Meetings… • Ballots…

  4. HL7.org and HL7UK • Membership organisations • Both aim to provide standards that support Clinical Information System Interoperability • HL7UK does this in a UK context

  5. Products • Specifications • V2, V3, CDA, Arden, CCOW, … • Informative, Normative or Reference • Methods for developing specifications • MDF, HDF, …

  6. Organisation • ANSI, ISO, CEN • TCs, SIGs and others • Technical Committees • Special Interest Groups • HL7.org, and the affiliates

  7. HL7.org Meetings • Working Group Meetings • Three meetings a year, 400 attendees • Committee work and tutorials • Harmonisation • Three times a year, 20 attendees • Conference calls • Mailing lists

  8. HL7UK meetings • 6 technical meetings a year, 20-30 attendees • Networking • Reporting on UK HL7 projects • Planning UK activity in HL7.org • detailed review • UK conference • HC200x Stand and demonstrations

  9. Ballots • Central and Affiliate • Committee and Membership • Joining ballot pools, and meaning of votes • Resolution of negatives

  10. Semantics and Technology • “Semantics” is the definition of the data items that are permitted in the message • “Technology” is what is used to transmit that meaning between systems • Hl7v3 is semantics, XML is technology

  11. Skills Reuse • XML used for more than just EDI • Component interfaces • User interface • Printed Document formatting • Temporary and persistent Data storage • Semantics are not just used in interfaces • Reporting engines • System architecture • Requirements gathering

  12. Training and Skills • EDI needs experienced developers • XML skills can be developed elsewhere • Parser writing • Not need widely in Clinical applications • Error prone • EDI can become a trap for good developers

  13. Validation at Source • Schemas, DTDs, and black boxes • Keep your own dirty laundry • Avoid doing free testing for other suppliers • Identify who is responsible for errors • Machine readable specifications • Taken further in V3

  14. Are the Schemas normative • Do I have to use the Schema?… • What is normative is the definition of the set of valid instances • DTD / Schema used for: • Description • Validation • Validation takes time • Diagnostic and runtime validation

  15. Is Schema validation enough? • No – Rules the schema does not check • Co-occurrence constraints • Contingencies on facts beyond the message • Orchestration of the messages • No – Schema validators get better

  16. Tools • Visio Tools • Schema generator • Message Viewer – xClinView • Message Documentation Editor • Schema processors, rsXMLtest • XML IDE -- XML Spy

More Related