ENUM

ReportHistorySpecialValue

Special reference used instead of a date when comparing historical field values.

GraphQL Schema definition

enum ReportHistorySpecialValue {
# Compares against the first recorded value of the field.
FirstValue
# Compares against the value the field had before its latest change.
PreviousValue
}

Require by

ReportHistoryComparisonDateDate at which tracked field values are compared: a fixed date, a special value or a date relative to today.