1. iREX vs. T. Rex: Immunization Record Exchange
David John Marotta DT7 Software

2. iREX Project Description
CDC Project to encourage HL7 Immunization transport between state registries
Toolkit to facilitate HL7 Immunization encoding, transport, receipt, acknowledgement, and parsing.

3. Immunization Registry Exchange
Message Trigger
Message Encoding
Message Transport
Message Receipt
Message Acknowledgement
Message Parsing
Message Handling
iREX Toolkit

4. Message Trigger
Business case for implementing immunization message exchange
Funding and management support for project implementation
Business rules to send a VXU V04 - Unsolicited Vaccination Record Update
Business rules to send a VXQ V01- Query for Vaccination Record

5. Message Encoding
Visual Message Definition (VMD) takes HL7-friendly file and handles the message encoding.

6. Message Transport Secure HTTP (HTTPS) Privacy Authentication
Simplicity
Real-time acknowledgement
Dedicated line (DL)
This Proprietary Software Product Mandated By Our State Legislature (TPSPMBOSL)
September, 2002, thanks to
Joe Rockmore
Andrew Yeates
Kevin Davidson
"Transport of Immunization HL7 transactions over the Internet Using Secure HTTP"
Virtual Private Network (VPN)
Digital Certificates (DC)
Encrypted (e )
Encrypted FTP (eFTP)

7. Message Receipt HTTPS is always available
Messages can be stored into any format
ODBC table inserts can store messages directly into a database

8. Message Acknowledgement
Messages are acknowledged in real time
Message acknowledgement can include data specific responses from an interaction with a database
Acknowledgement does not require the sending system to have a message server

9. Message Parsing
The visual message definition is used to parse the message according to the implementation guide
Messages are parsed into an HL7-friendly record format

11. Message Handling
Business rules when to accept unsolicited update message
Business rules when to respond to query request
Data scrubbing and quality control issues
De-duplification of patients
De-duplification of care facitilites

12. iREX Toolset Visual Message Definition Java HTTPS Message Receiver
Immunization Message Transmiter
Available for free use, source included
Website: