Date and Time Requirements
- Megan Forbes
- Rick Jaffe
- Aron Roberts (Unlicensed)
- Jesse Martinez
Definition
The management and documentation of dates and time associated with object, procedural, and organizational records.
Requirements
The system should allow the user to:
- Add a date or time to any object, procedural, or organizational record
- Add a date range or estimated date to any object, procedural, or organizational record
- Add an era, epoch, dynasties, or other named time period to an object, procedural, or organizational record (may be supported by a controlled list or vocabulary)
- Specify the parameters of a ranged date (e.g. early 19th century = 1801-1833)
- Specify the system's default calendar (e.g. Gregorian, Julian) and time zone
- Choose an alternative calendar or time zone
Date-time Input (UI) Requirements
Standards, Guidelines, and Use Cases
CDWA
Creation Date
Styles/Periods/Groups/Movements
Person/Corporate Body Authority
CHIN Data Dictionaries
CIDOC CRM
View the E49, E50, and E52 Specifications
E49 Time Appellation
Scope Note: This class comprises all forms of names or codes, such as historical periods, and dates, which are characteristically used to refer to a specific E52 Time-Span.
The instances of E49 Time Appellation may vary in their degree of precision, and they may be relative to other time frames, "Before Christ" for example. Instances of E52 Time-Span are often defined by reference to a cultural period or an event e.g. 'the duration of the Ming Dynasty'.
Examples:
- Meiji (Japanese term for a specific time-span)
- 1st half of the XX century
- Quaternary
- 1215 Hegira (a date in the Islamic calendar)
- Last century
E50 Date
Scope Note: This class comprises specific forms of E49 Time Appellation.
Dates may vary in their degree of precision.
Examples:
- 1900
- 4-4-1959
- 19-MAR-1922
E52 Time-Span
Scope note: This class comprises abstract temporal extents, in the sense of Galilean physics, having a beginning, an end and a duration.
Time Span has no other semantic connotations. Time-Spans are used to define the temporal extent of instances of E4 Period, E5 Event and any other phenomena valid for a certain time. An E52 Time-Span may be identified by one or more instances of E49 Time Appellation.
Since our knowledge of history is imperfect, instances of E52 Time-Span can best be considered as approximations of the actual Time-Spans of temporal entities. The properties of E52 Time-Span are intended to allow these approximations to be expressed precisely. An extreme case of approximation, might, for example, define an E52 Time-Span having unknown beginning, end and duration. Used as a common E52 Time-Span for two events, it would nevertheless define them as being simultaneous, even if nothing else was known.
Automatic processing and querying of instances of E52 Time-Span is facilitated if data can be parsed into an E61 Time Primitive.
Examples:
- 1961
- From 12-17-1993 to 12-8-1996
- 14h30 - 16h22 4th July 1945
- 9.30 am 1.1.1999 to 2.00 pm 1.1.1999
- duration of the Ming Dynasty
Spectrum 3.1
View the Spectrum Date Definitions
Date association
Definition: How a Date relates to an event in an object's history.
How to record: Use a single term, without punctuation or capitalization. Maintain a list of standard terms.
Examples: carved; commissioned; decorated; designed; manufactured; sold; used; inscribed; painted; produced; collected
Use: As many times as required for an Object production date or Associated event date.
Date - earliest/single
Definition: The earliest probable or exact date at which an event in an object's history is thought to have occurred.
How to record: Always record the day, month and year in the same order. Always use the same character to separate each component. Be as specific as possible and indicate if the date is not known. Record all four digits for the year.
Examples: 8/10/1990; 06/1972; 1899; 29.1.1994
Use: Record once only for each event in an object's history. If the exact date of an event is known, or if only one probable date is known, only record Date - earliest /single.
Date - earliest/single certainty
Definition: A term describing the extent to which the Date - earliest/single recorded is thought to be correct.
How to record: Use a single term, without punctuation or capitalization. Maintain a list of standard terms. If left blank, the assumption is that the Date - earliest/single recorded is thought to be correct.
Examples: probably; possibly; circa; before; after
Use: Record once only for a Date - earliest/single if required.
Date - earliest/single qualifier
Definition: A qualification of the earliest probable or exact date at which an event in an object's history is thought to have occurred.
How to record: Use a single term, without punctuation or capitalization, or the standard statistical notation. Maintain a list of standard terms.
Examples: + or - 150; approximate
Use: Use for a Date - earliest/single as required
Date - latest
Definition: The latest probable date at which an event in an object's history is thought to have occurred.
How to record: Always record the day, month and year in the same order. Always use the same character to separate each component. Be as specific as possible and indicate if the date is not known. Record all four digits for the year.
Examples: 8/10/1990; 06/1972; 1899
Use: Record once only for a Date if required.
Date - latest certainty
Definition: A term describing the extent to which the Date - latest recorded is thought to be correct.
How to record: Use a single term, without punctuation or capitalization. Maintain a list of standard terms. If left blank, the assumption is that the Date - latest recorded is thought to be correct.
Examples: probably; possibly; circa; before; after
Use: Record once only for a Date - latest if required.
Date - latest qualifier
Definition: A qualification of the latest probable date at which an event in the object's history is thought to have occurred.
How to record: Use a single term, without punctuation or capitalization, or the standard statistical notation. Maintain a list of standard terms.
Examples: + or - 150; approximate
Use: Use for a Date - latest as required
Date - period
Definition: A textual expression of the period when an event in an object's history is thought to have occurred.
How to record: Use a single term. Maintain a list of standard terms, based on a recognized terminology source.
Examples: medieval; Ming; Bronze Age
Use: Record once only for an event in an object's history.
Date text
Definition: The textual expression of the date or date span when an event in an object's history is thought to have occurred.
How to record: Use normal grammar and punctuation.
Examples: Late 19th century or early 20th century.
Use: Record once only for an event in an object's history.
Wireframes
Service Descriptions
Schema
User Story Summaries
Date and Time User Story Summary