The
element DATE.CREATED refers to the creation date of the resource
in its life cycle. Dates associated with the creation of a metadata
record itself should be handled by a Digital Asset Management
system, not the PBCore.
Do not confuse dates in this element with dates
and time indicated in the element COVERAGE.TEMPORAL. The various
qualified elements for DATE are
for administrative events such as final creation of the resource
or its issuance or last modification. DATE has to do with the
physical instantiation of a resource, not the intellectual
content found within a resource.
A properly formatted date consists of an ASCII
date string of 10 characters for the standard date format YYYY-MM-DD
(1998-01-24), unless
time
stamps are included (T08:15:30-05:00).
- Year (YYYY) is defined as 0000 to 9999.
- Month (MM) is defined as 01 to 12.
- Day (DD) is defined as 01 to 28, 29, 30 or
31 as applicable.
- The separator between date fields isa hyphen,
(-).
If needed, the time stamp (Thh:mm:ssTZD) directly
follows the date designation. It begins with the letter "T" to flag that a time stamp is present.
The time format (hh:mm:ss) consists of two digit
designations for hours, minutes and seconds (19:20:30) in a 24
hour clock mode. If necessary,
the seconds may be further defined by a
decimal fraction of a second (19:20:30.45).
The time zone designator (TZD)completes the statement
and consists of a + or - sign and the number of hours a particular
time zone deviates
from Greenwich Mean Time.
If a date is approximate, add a question mark
but separate the date from the question mark by a space so that
the question
mark is not interpreted
as part of the date value by a search
engine.
Generally, year or year-month-day will provide enough precision.
If the full date is unknown, month and year (YYYY-MM)
or just year (YYYY) may
be used. Many other schema are possible,
but if used, they may not be easily interpreted by users or software. |
Describe
this Element