OptionalcardinalityOptionalcaseIDS is case-sensitive (bSI #346); default true. Applies to eq/ne/contains/notContains/in/notIn and to unique/groupBy keys. Regex flags remain the author's; globalId is always exact.
OptionaldescriptionOptionalseverityOptionaltoleranceRelative tolerance for numeric eq/ne/gte/lte; default 1e-6 (bSI #418).
Which elements the rule applies to. Groups OR-ed, rules inside AND/OR per group.
ifcTyperules may carryexactClass.