Spotfire: Is the IN operator officially supported?

Problem:

Is the IN operator officially supported in Spotfire?

I have been using it conveniently, however it is not listed in the list of supported functions/operators.

e.g.,

If([States] in ("NJ","NY",AL"),TRUE)

if([digits] in (1,3,5,100),TRUE)

Resolution:

While it is not documented, Spotfire support has officially stated that IN operator is supported in Spotfire.