This compound is used "under the hood" in the Emit compounds to get the particle's velocity data at emission time as defined by its Init_PointVelocity attribute. You can output the Emit Velocity Vector and Emit Speed data.
To add this node, drag it into an ICE tree from the \Data\Compounds subdirectory of the Softimage installation location.
Output Ports: Emit_Velocity, Emit_Speed