Oct 31, 2008

This directory contains data files from the Veterans Health Administration
(VHA) National Drug File Reference Terminology (NDF-RT).  NDF-RT is the
terminology used by FDA and the FedMed collaboration to code these essential
pharmacologic properties of medications: 
	Mechanism of Action
	Physiologic Effect
	Structural Class
These three subsets are available individually at (same location):
     http://evs.nci.nih.gov/ftp1/FDA/ndfrt/
     ftp://ftp1.nci.nih.gov/pub/cacore/EVS/FDA/ndfrt/

As of March 2007, the NDF-RT Public Edition is the version published for FDA,
FedMed, and other purposes outside the VA system.  This version contains all
of the core NDF-RT concepts from previous releases, and all concept NUIs
remain unchanged.  The only omission is data elements deemed useful solely for
internal VA operations.  See the Release Notes for additional detail.

Starting in January 2008, VHA has released a new version showing the logically
inferred view of the terminology, rather than the directly stated (defined)
assertions in the older release series.  They plan to provide a description of
the distinctive characteristics of this version, meanwhile released here as is
for those interested.

Contents - Files:

NDF-RT.txt                                (all codes/names: tabbed text)
NDF-RT_XML.zip                            (full XML data file: zipped)
NDF-RT_XML_Inferred.zip                   (logically inferred version)
NDF-RT_Public_All.zip                     (all VHA release files: zipped)
NDF-RT Public Edition Release Notes.txt   (details on new release)
ReadMe.txt                                (this file)

Contents - Directories:

Archive                                   (dated/earlier file versions)