cyber:FirstObservedDate (NIEM Wayfarer 5.1)

cyber:FirstObservedDate can contain:

nc:Date
A full date.
(replacing nc:DateRepresentation)
nc:DateRange
A time period measured by a starting and ending point.
(replacing nc:DateRepresentation)
nc:DateTime
A full date and time.
(replacing nc:DateRepresentation)
nc:DayDate
A day date.
(replacing nc:DateRepresentation)
nc:FiscalYearDate
A year of a twelve month period that does not necessarily correspond to the calendar year.
(replacing nc:DateRepresentation)
nc:MonthDate
A month.
(replacing nc:DateRepresentation)
nc:QuarterID
An identifier of a three-month period in a calendar or fiscal year.
(replacing nc:DateRepresentation)
nc:YearDate
A year.
(replacing nc:DateRepresentation)
nc:YearMonthDate
A year and month.
(replacing nc:DateRepresentation)
nc:ZuluDateTime
A date and time with no offset from Coordinated Universal Time (UTC).
(replacing nc:DateRepresentation)
nc:DateMarginOfErrorDuration
A subjective assessment of the uncertainty of an estimated point by bounding an elements value with an estimated margin of error.

cyber:FirstObservedDate can be contained in any of these elements:

cyber:ObservedData (of cyber:ObservedDataType)
An information about a cyber security entity, such as a file, system, or network, that has been observed at a particular time

Everything cyber:FirstObservedDate can contain:

nc:Date A full date.
nc:DateRange A time period measured by a starting and ending point.
nc:DateTime A full date and time.
nc:DayDate A day date.
nc:FiscalYearDate A year of a twelve month period that does not necessarily correspond to the calendar year.
nc:MonthDate A month.
nc:QuarterID An identifier of a three-month period in a calendar or fiscal year.
nc:YearDate A year.
nc:YearMonthDate A year and month.
nc:ZuluDateTime A date and time with no offset from Coordinated Universal Time (UTC).
nc:DateMarginOfErrorDuration A subjective assessment of the uncertainty of an estimated point by bounding an elements value with an estimated margin of error.

NIEM Wayfarer 5.1