Clark & Parsia.

Which version of Pellet am I using?

If you are using an official release of Pellet, you can get version info by passing the -version option to the Pellet command line utility. For example, on a Unix-like system, from the distribution directory one would run

sh pellet.sh -version

And expect to see something like

Version : 1.4 Released: March 16 2007

Alternately, the org.mindswap.pellet.utils.VersionInfo class can be used in a Java program to determine the Pellet version.