4.7. Date
Label: Date
Element Description: : A date associated with the creation or
availability of the resource. Such a date is not to be confused with one
belonging to the Coverage element, which would be associated with the
resource only insofar as the intellectual content is
somehow about that date. Recommended best practice is defined in a
profile of ISO 8601 [Date and Time Formats (based on ISO8601), W3C
Technical Note http://www.w3.org/TR/NOTE-datetime] that includes (among
others) dates of the forms YYYY and YYYY-MM-DD. In this scheme, the date
1994-11-05 corresponds to November 5, 1994.
Guidelines for creation of content:
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.
Examples
<META NAME="DC.Date" CONTENT="1998-02-16">
<META NAME="DC.Date" CONTENT="1998-02">
<META NAME="DC.Date" CONTENT="1998">
Qualifiers for DC.Date
From
LC
SCHEME:
(Default is ISO 8601)
ANSI X3.30
IETF RFC 822
TYPE: Note that the names of the subelements have not been agreed upon. The Date Working Group continues to work on these. There was some controversy at the end of DC5 as to whether the first two type subelements should be combined. It was also uncertain whether to include the last three subelements.
DC.Date.Creation_of_intellectual_content
DC.Date.Creation/Modification_of_present_form
DC.Date.Formal_publication
DC.Date.Available
DC.Date.Valid (includes verification)
DC.Date.Acquisition/Accession
DC.Date.Accepted
DC.Date.DataGathering
From
UK
Scheme
IETF.RFC-822
Date conforms to the date formats described in RFC 822, for example "Sat, 31 Aug 1996 21:12:34 +0100". This is the default scheme value if the scheme is not explicitly stated.
ANSI.X3.30-1985
Date conforms to the date formats described in ANSI X3.30-1985. For the A.D. era to December 31, 9999, YYYYMMDD is used; for example 19960831 (the same as FGDC?). It also defines other formats for B.C. dates and A.D. after 9999.
ISO.31-1:1992
Date conforms to the date formats described in ISO 31-1:1992. For example 1996-08-31.
FGDC
Date conforms to the date formats described in the FGDC. It is similar to the ANSI.X3.30-1985 scheme; for example 19960831.
SSE
Seconds Since the Epoch; the standard UNIX internal time keeping format. This is an integer number of seconds since midnight on 1st January 1970.
Type
Creation
The date on which the resource was first created. This is the default type value if the type is not explicitly stated.
Current
The date on which the current form of the resource was created.
Modified
The date on which the resource was last modified.
ValidFrom
The date from which the resource is valid.
ValidTo
The date after which the resource is no longer valid.
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