PCS Variable Types?

I have a question regarding the literature delivered with PCS studio.
Specifically the Reference Guide.
Under the Model Segments and Properties->Named Dimensions & Variables->Adding a New Variable,
it indicates the Variables can be of type "String" as indicated below.

The Type may be Length, Angle, Number or String. Lengths and Angles will be formatted according to the current Units Settings.

However, When I create a new variable only options Length, Angle, or Number are available.
I have been trying to get a True/False boolean Datagroup Definition to set a variable in PCS studio with little success.

Basically, I have a double door cell that I would like to be able to use for both equal and unequal door leaf pairs.
I could have a true / false variable named "Equal Leafs" that if true would automatically set both pairs of doors equal in width
and if false would allow the doors to be of unequal widths using Active Leaf Width.

However, I have been able to achieve the concept by setting "Equal Leafs" to 1 for true and 0 for false but this is not very intuitive for our users.

Any Ideas on how to achieve the string variable per the Reference Guide and better yet to get a True False Boolean Datagroup Definition
to work in PCS studio.
Thanks in advance.
Tom