OptionalAllowedOptionalCurrencyOptionalDisplayA lookup's columns shown to the model next to each allowed value.
OptionalFilterA lookup's filter on the rows it allows (a view filter).
OptionalIntegerOptionalItemResult path checked per item when the output is an array (e.g. "$.JobFunctionID").
OptionalLevelsOptionalLookupA lookup's match column: the constraint's MatchField, else the target's LookupMatchField, else Name.
OptionalMaxOptionalMaxOptionalMaxOptionalMinOptionalMinOptionalRelatedA lookup's entity: the constraint's Entity, else the target field's foreign-key entity.
OptionalThresholdOptionalValueOptionalValueAllowed value → the text shown to the model next to it (lookup DisplayFields).
Concrete resolved constraint after metadata expansion (e.g. FromFieldMetadata resolved into concrete values).