The mission of the OSEHRA Documentation Group is to provide clear and accessible definition of the components of the codebase, the manner which they function, and how they interact.  We will provide initial documentation of the existing architecture and regular updates, as needed.  To learn more, join the Documentation Group ... here!

Existing Documentation

The documentation of the existing architecture is a hybrid comprised of legacy and modernized applications, services, and data repositories.  The VistA codebase is a living, dynamic environment gradually evolving from a MUMPS to a Java based platform, and Service Oriented Architecture (SOA). Documentation associated with VistA modules includes:

  1. VA Software Document Library (VDL) 
  2. VistA Monograph on the Internet 
  3. VA FOIA site for VistA codebase Library
  4. VHA Enterprise Architecture: VHA developed an Enterprise Architecture that provides a technical framework to promote a one technology vision across the Department so that all systems are interoperable.
  5. VA TRM public site: The One-VA TRM includes the Standards Profile and Product List, which collectively serve as a technology roadmap and as a tool for supporting Office of Information & Technology (OIT)
  6. VA Information Technology Strategic Plans
  7. User, Technical, Programmer Manuals
  8. VistA Demo
  9. Public facing Virtual Office of Acquisition (VOA) portal which includes links for the following two libraries:
    1. VA Software Development Standards for VistA
    2. VA Interface Control Registrations (ICRs)
  10. SOAP-style web service consumption used by HealtheVet XOBW
  11. REST-style web service consumption, used by HealtheVet XOBW
  12. GT.M Administration and Operations Guide
  13. Caché documentation
  14. Corporate Databases Monograph: The Corporate Database Monograph provides an overview of the active VHA national databases. Information contained in this monograph allows stakeholders to identify opportunities for database consolidations, determine authoritative data sources, and work with VHA Data Quality committees to implement data standardization and quality control processes for corporate databases.
  15. VA eHealth University (VeHU) is VA’s major annual training conference that provides education on the Computerized Patient Record System (CPRS) and related clinical software (VistA) developed by the Veterans Health Administration (VHA).
  16. Patch descriptions (
  17. VistA Modernization Report Legacy to Leadership (2010) 
  18. HealtheVet Logical Model
Planned Documentation

Going forward, the OSEHRA website will also contain a VistA System Architecture (SA) tool-generated HTML-navigable VistA SA model.  The VistA SA model will be both a tool and documentation based-on and including links-to the VistA documentation library.  The VistA SA tool will contain architectural artifacts, including but-not-limited to:

  1. VistA  Components modeled as UML classes, showing
  2. Component descriptions and functions
  3. Component-to-component dependencies
  4. Component-to-data dependencies
  5. Appropriate Links to VistA Documentation Library


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VA testing cash prizes to improve its health record system -


Please see and hear an interview released today by Federal News Radio on the Department of Veterans Affairs (VA) initiative to use contests as an important strategy to reduce risk in acquiring open source compatible health information technology.  

In this interview, Roger Baker, CIO, VA, persuasively describes why this groundbreaking new way of doing business has important implications for the iEHR, VBMS and federal health IT acquisition strategy going forward ...

1st OSEHRA Corporate Member Quarterly Update Meeting ... Friday, 11 January 2013, 1:00 PM (EST)


Please accept our best wishes for a “Happy, Prosperous and Open” 2013.

On Friday, 11 January 2013 at 1:00 PM (EST), OSEHRA will convene our first Corporate Member Quarterly Update Meeting.  Attendees will include representatives from our industry, nonprofit and government organizational membership.

These virtual meetings will be conducted via WEBEX on the second Fridays of the month in January, April and July of 2013.

Documentation Working Group will be archived.


Hello Documentation Working Group,

The OSEHRA Admin team has begun implementing the Working Group Restructuring plan that was published on this website on September 5th, 2012. In accordance with that plan, this group will be archived so that previous discussions and postings will still be available to view but members will be unable to comment or edit any further.

If you have any questions or concerns about this process, please email Administration at

OSEHRA Member Seeking to Immediately Hire Two VistA Software Developers


A member of OSEHRA,who is CEO of an Health IT firm in the Washington, D.C. area, is seeking to make 2 immemdiate hires of VistA software developers (Mumps and delphi preferred).  He is also seeking to identify VistA database developers, testers and trainers, beyond the immediate 2 developer requirement, for potential future hires.  

If you are interested in learning more about these opportunities, please contact me at the email in my signature block below.  

Please Vote! ... VistA Extension Challenge 2012 ... Ends Monday, 10 September!



Please see message below from OSEHRA member and open source thought leader, Fabian Lopez ...

The VistA Extension Challenge 2012 has received 4 code submissions into its well designed online platform. 

Please review the submissions and vote as a member of OSEHRA.  

Remember ... Fabian is asking for your Vote ... Register your Opinion ... It is Important!

Thank you in advance, and ...




Hello OSEHRA Members,

The Administrative team has been working to make the Working Groups system more streamlined so that we can better support you. In order to do this, we'll be making some changes and we want your opinion!

Below is the full proposal of the New Working Group Restructuring Plan. Please submit your comments for review by attaching them to this discussion by September 14, 2012. We look forward to your commentary!

Thank you!

The Second Annual VISTA Expo is right around the corner!


An important message from our friend, Carol Monahan, Director of Strategy, VISTA Expertise Network, about the rapidly approaching VISTA Expo & Symposium.



The Second Annual VISTA Expo is right around the corner!

No questions have been added to this group.

Using CPRS with VistA

A new installation of FOIA VistA with the CPRS GUI is enough to get started learning VistA, but not to actually use the system to record patient medical data. There are a number of additional components required, as well as significant configuration procedures, in order to achieve an application that is clinically useful. Specifically, the following data items are not available in a freshly installed FOIA VistA instance:

  • test patients
  • care provider profiles
  • pharmacy formulary (Drug File)
  • locations (facilities and clinics)

The OSEHRA Documentation Wiki

The OSEHRA Documentation wiki enables the OSEHRA community to write documents collaboratively, using a simple markup language and a web browser. A single page in a wiki website is referred to as a "wiki page", while the entire collection of pages, which are usually well interconnected by hyperlinks, is "the wiki". A wiki is essentially a database for creating, browsing, and searching through information.

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