From discord:

AuryToday at 7:27 PM
@George Moromisato is there any way to do an OR of system attributes in either the criteria specification or the affinity specification?
Ex: +(coalitionSpace; reanSpace;)
^ that would translate to "if either of the enclosed attributes is not present, reduce frequency to one-half normal"
 
George MoromisatoToday at 7:38 PM
Not currently supported, unfortunately. Your best bet is to add an additional attribute. For example, you might add "jointSpace" (or whatever) to all systems with either coalitionSpace or reanSpace. Then you can key off that.
 
AuryToday at 7:39 PM
ah ok, thanks - I'll put in a feature request for that
assumedpseudonym 15 Oct 2019:

 …And if you’re going to do that, there might ought to be NAND and XOR syntax, too.

wolfy 15 Oct 2019:

:3 I agree

assumedpseudonym 18 Oct 2019:

 See also: Support 'OR' in shipbroker ship inventory selection attributes

 Basically, any criteria/attribute system needs to have OR/XOR/NAND functionality added.