Group
A Group specifies a set of records. It is used for filtering records. Multiple groups could be used in comparison visualizations.
Groups are defined with a Boolean expression, returning true (respondent belongs to group) or false (respondent doesn't belong), or null (missing/ unknown).
Example Groups syntax:
country==1
age>=30 and age<40 // captures ages 30-39
hhincome in (2,3,4) // captures a range of household income
seg==1 and (own_01==1 or own_02==1 or own_03==1) // in seg 1 and own a product
// proposed range syntax?
age in (40:50) // ages 40-50
something in (5,10:15,20) // weird, but possible