This is a version of the XnatDataClient (XDC) tool that ships with the XNAT installation. It has been broken out on its own so that it can be placed anywhere on the user’s system path.
XDC is provided as a Java archive or jar file. The jar file is packaged as a Java application, with the required classpath included in the archive manifest. The practical result of this is that you can run the application just by specifying the XDC jar file (named data-client-version.jar) with the JVM call:
java -jar lib/data-client-1.6.5.jar -h
Once installed, you can run XDC just by typing the script name:
More information on working with XDC is available on the XNAT wiki: https://wiki.xnat.org/xnat-tools/xnatdataclient
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