(Optional) Contains the
Location User-Defined Field (UDF) to use to create the user-generated deterministic
Event Set. For example, if you specify
UDF1, Touchstone® creates one event for each combination of ring centroid and UDF value.
You can specify a UDF only if you specify a TopNRingsToUse value.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2