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OSU Library Metadata: A Guideline to Best Practices: Date Digital

This site provides guidelines for OSU's local implementation of CDP Dublin Core Metadata Best Practices Version 2.1.1

Date Digital

Label: Date Digital
Maps to Dublin Core Element Name: dateDigital
Maps to MARC field (in World Cat): 264
Mandatory: Yes, if applicable
Repeatable: Yes. May also choose to use the date field with the following refinements in place of
Date.Digital if the refinements are more appropriate.

Refinement Name

Refinement Label




Date of creation of the resource



Date (often a range) of validity of a resource



Date (often a range) that the resource will become or did become available



Date of formal issuance (e.g., publication) of the resource



Date on which the resource was changed


Schemes: ISO 8601 (W3C-DTF)

Dublin Core Definition: Date Digital

 A date of an event in the life cycle of the resource.

Dublin Core Comment: Date Digital

Typically, Date [Digital] will be associated with the creation or availability of the resource. Recommended best practice for encoding the date value is defined in a profile of ISO 8601 [W3CDTF] and follows the YYYY-MM-DD format.

Comment/Context: Date Digital

Date of creation or availability of the digital resource. The contributing institution may approximate the date a resource was digitized.

Input Guidelines: Date Digital

  1. A resource may have several dates associated with it, including: creation date, copyright date, revision date, edition date, modification date, etc.
  2.  Enter dates in the form “YYYY-MM-DD” in accordance with the W3C Date Time Format (W3CDTF) encoding scheme. Use a single hyphen to separate the year, month, and date components:

a. Year YYYY (“1997” for the year 1997))
b. Year and month: YYYY-MM (“1997-07” for July 1997))
c. Complete date: YYYY-MM-DD (“1997-07-16” for July 16, 1997)


1. Enter dates pertaining to the original version of the resource under the Date Original element.

2. Local systems or databases may utilize other date formats and conventions for date entry. Also,
some databases distinguish between free text "display" date values, and normalized date values for
more efficient back-end sorting.

3. The contributing institution may approximate the date a resource was digitized.

Examples: Date Digital

Examples: Date Digital [W3C-DTF]



Digital object created April 5, 2004


Date for digitized article reprint: reprinted 1948; digitized 2002


Date with only year known