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lyberty.com | eclectic content This page created: 2005-06g-17  |   Content last updated: 2005-06g-17   |   Author: Lyberty   

ISO 8601 (a recommended standard from the Internationl Organization for Standardization)
defines the formatting of the date as follows:

YYYY-MM-DD

where

YYYY indicates a 4 digit year,

MM indicates a 2 digit month (with a leading zero for months 1 through 9, i.e. January through September), and

DD indicates a 2 digit date/day (with a leading zero for days 1 through 9).

Note: As of June 2005, the current version
of the Recommended Standard "ISO 8601"
is "ISO 8601:2004".

Sample application:

Use of the ISO 8601 date format for web pages (HTML); metadata format about the page.

--------------------------------------------------------------

<!-- dc.date.created : YYYY-MM-DD -->
<!-- dc.date.modified : YYYY-MM-DD -->
<!-- the most recent 'modified' date indicates 'last-modified on ...' -->

<meta name="created" content="2005-06-17">
<meta name="modified" content="2005-06-17">


<!--
// see MANDATORY COMMON LOOK AND FEEL METADATA ELEMENTS
// and the DCMI Standard:
// http://www.dublincore.org/documents/usageguide/#html
// http://www.cio-dpi.gc.ca/im-gi/meta/clf-nsi-meta/clf-nsi-meta_e.asp#Date
-->

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See also: W3C-DTF / [W3CDTF] - the "Date/Time Format" of the W3C;
a.k.a "W3C Encoding rules for dates and times - a profile based on ISO 8601"
-> human readable format (English)

--------------------------------------------------------------

Alternatives defined in the DC Schema:

"Available"; "Issued" ; etc.

For example:

<!-- 'issued' = Date resource was made available, e.g. web page published. -->
  <dcterms:issued>2000-07-11</dcterms:issued>
<!-- 'modified' = Date resource was last updated or changed. -->
  <dcterms:modified>2002-06-15</dcterms:modified>

HTML Formatted Definitions: http://www.dublincore.org/documents/dces/
XML DTD: http://dublincore.org/2005/06/13/dcq#modified

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Further information about date/time formatting, including history and alternate or supplemental approches: ./date_format.html

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DTD Sample:

- <rdf:Property rdf:about="http://purl.org/dc/terms/available">
  <rdfs:label xml:lang="en-US">Available</rdfs:label>
  <rdfs:comment xml:lang="en-US">Date (often a range) that the resource will become or did become available.</rdfs:comment>
  <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/terms/" />
  <dcterms:issued>2000-07-11</dcterms:issued>
  <dcterms:modified>2002-06-15</dcterms:modified>
  <rdfs:subPropertyOf rdf:resource="http://purl.org/dc/elements/1.1/date" />
  <dc:type rdf:resource="http://dublincore.org/usage/documents/principles/#element-refinement" />
  <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#available-002" />
  </rdf:Property>
- <rdf:Property rdf:about="http://purl.org/dc/terms/issued">
  <rdfs:label xml:lang="en-US">Issued</rdfs:label>
  <rdfs:comment xml:lang="en-US">Date of formal issuance (e.g., publication) of the resource.</rdfs:comment>
  <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/terms/" />
  <dcterms:issued>2000-07-11</dcterms:issued>
  <dcterms:modified>2002-06-15</dcterms:modified>
  <rdfs:subPropertyOf rdf:resource="http://purl.org/dc/elements/1.1/date" />
  <dc:type rdf:resource="http://dublincore.org/usage/documents/principles/#element-refinement" />
  <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#issued-002" />
  </rdf:Property>
- <rdf:Property rdf:about="http://purl.org/dc/terms/modified">
  <rdfs:label xml:lang="en-US">Modified</rdfs:label>
  <rdfs:comment xml:lang="en-US">Date on which the resource was changed.</rdfs:comment>
  <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/terms/" />
  <dcterms:issued>2000-07-11</dcterms:issued>
  <dcterms:modified>2002-06-15</dcterms:modified>
  <rdfs:subPropertyOf rdf:resource="http://purl.org/dc/elements/1.1/date" />
  <dc:type rdf:resource="http://dublincore.org/usage/documents/principles/#element-refinement" />
  <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#modified-002" />
  </rdf:Property>