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VA Technical Reference Model v 21.9

Veterans Data Integration and Federation Enterprise Platform (VDIF-EP) VistA REST Service Standard
Veterans Data Integration and Federation Enterprise Platform (VDIF-EP) VistA REST Service Standard Standard or Specification

General InformationGeneral Information help

Technologies must be operated and maintained in accordance with Federal and Department security and privacy policies and guidelines. More information on the proper use of the TRM can be found on the TRM Proper Use Tab/Section.

Documentation: Please view the Reference tab.
Description: This standard seeks to provides access to VistA Representational state transfer (REST) resources and create the following consistencies in Veterans Data Integration and Federation Enterprise Platform (VDIF-EP) VistA REST service development:
  • Set the pattern used in an uniform resource identifier (URI) invoking a service acting on one of the resources.
  • Identify requirements for documenting VistA REST services.
  • Standardize resource domains for the VDIF-EP resources.
  • Clarify the use of Hypertext Transfer Protocol (HTTP) verbs and message Header and Body for VistA REST services.
  • Required VistA REST service Documentation:
    • REST Service Index Document
    • REST Service Integration Control Record


The latest version of the stardard is 1.0, released September 2020.
Technology/Standard Usage Requirements: Users must ensure their use of this technology/standard is consistent with VA policies and standards, including, but not limited to, VA Handbooks 6102 and 6500; VA Directives 6004, 6513, and 6517; and National Institute of Standards and Technology (NIST) standards, including Federal Information Processing Standards (FIPS). Users must ensure sensitive data is properly protected in compliance with all VA regulations. Prior to use of this technology, users should check with their supervisor, Information Security Officer (ISO), Facility Chief Information Officer (CIO), or local Office of Information and Technology (OI&T) representative to ensure that all actions are consistent with current VA policies and procedures prior to implementation.
Section 508 Information:
Decision: Approved. This entry has been approved for general use.
Decision Constraints:

Decision Source: TRM Mgmt Group
Decision Process: One-VA TRM v20.10
Decision Date: 10/06/2020
Introduced By: TRM Request
- The information contained on this page is accurate as of the Decision Date (10/06/2020).