HL7 version 2

The HL7 version 2 standard has the aim to support hospital-internal workflows. It consists of an elaborate set of message specifications.

Understanding HL7 v2

Implementing HL7 v2

Other Topics

Basics
- High Level presentation (Powerpoint)
- More detailed presentations, in English,Spanish (PDF format) and German (Video).
- Introductory online documentation (English), Overview (Japanese), (German)
- Example instances (introductory)
- Differences between 2.x versions
Whitepapers about elements of the standard
HL7 version 2 specifications
- [1] HL7 v2.7 (draft, January 2009)
- [2] (draft 2.4) and [3] (v2.3 spec). Note that these are old versions of the standard.
- v2.1-2.6 Artefact structures; no documentation.

Free Programming Toolkits
- Java HAPI (probably the best free toolkit)
- .net HAPI
- PERL HL7v2 API
- Ruby HL7 library
- Python library
- Open eHealth Integration Platform (IPF) Groovy based DSL.
Free Toolkits
- Nule
- HL7 Inspector
- QuickView HL7v2 Viewer and Editor.
- NIST testing toolkit
- HL7 on SourceForge Search results
Statistics
- Number of messages per Patient Visit
v2.XML
- Latest v2.XML Schema

Example HL7 v2 Implementation Guides
- Vaccination message implementation guide (based on v2.3.1)
  - Immunization Message Examples
- IHE HL7 version 2 based profiles: e.g. Radiology, Demographics data (ITI - PIX, PDQ, PAM).
Blogs
- CorepointHealth Blog (ex-Neotool)
- HL7 v2 Technocrati RSS Search
- v2.XML mapping to other XML Blogpost about using a toolkit to auto generate Java/C code for XML mappings.
Bookmark Sites
- HL7 v2 or HL7 2.x bookmarks on del.icio.us