when-iso 

supplies the value of a date or time in a standard
form.

Attribute Information

Used By

Attribute Group tei:att.datable.iso.attribute.when-iso

Source 

<xs:attribute name="when-iso">
  <xs:annotation>
    <xs:documentation>supplies the value of a date or time in a standard form.</xs:documentation>
  </xs:annotation>
  <xs:simpleType>
    <xs:union memberTypes="xs:date xs:gYear xs:gMonth xs:gDay xs:gYearMonth xs:gMonthDay xs:time xs:dateTime">
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:pattern value="[0-9.,DHMPRSTWYZ/:+\-]+"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:union>
  </xs:simpleType>
</xs:attribute>

Sample