Multiple values for a Parameter

[JM_10432119]

I'd like to make a parameter have more than one value. I know this would only cause problems for most applications and may not be possible. 

Here's what I tried doing and how it failed:

CALLED_FROM = "2" AND CALLED_FROM = "3"

errorExtra symbols found - ignored.
CALLED_FROM = ["2", "3"]

errorRelation has an error.

[BenLoosli]

Please explain what you are trying to accomplish as that may help us get to a viable solution.

As it is, a parameter can only have 1 value assigned to it.

[JM_10432119]

I'm trying to filter out parts in BOMs by using a rule (&asm.mbr.CALLED_FROM == #) but I sometimes have parts that appear in multiple BOMs

And yes a family table could solve this problem but I don't like using them for things like this