Type: ISODate

ISO 8601 date or interval/period, more specifically, EDTF conformance level 0 as well as qualifiers ? (uncertain date) and ~ (approximate date). See examples and references for more information

URI: xsd:string

• base: str

• uri: xsd:string

• typeof: string

• pattern: ^-?([1-9][0-9]{3,}|0[0-9]{3})(-(0[1-9]|1[0-2])(-(0[1-9]|[12][0-9]|3[01]))?)?[?~]?(/-?([1-9][0-9]{3,}|0[0-9]{3})(-(0[1-9]|1[0-2])(-(0[1-9]|[12][0-9]|3[01]))?)?[?~]?)?$

Examples

Value	Description
2024-04-24	complete date, i.e. year, month and day
2024-04	year and month
2024	year only
2024~	approximate date (2024 or at least close to 2024)
2024?	uncertain date (2024 or may be something different)
2023/2024	interval (2023 until 2024)

See Also

• https://www.loc.gov/standards/datetime/

Identifier and Mapping Information

Annotations

property	value
pid	21.T11969/90ce854c789144a37fb7

Schema Source

• from schema: https://www.av-efi.net/av-efi-schema/model

Mappings

Mapping Type	Mapped Value
self	avefi:ISODate
native	avefi:ISODate