<era>
Era of Time
A specified range of years that is named for
an event, political ruler, or characterization of the
timespan.
Remarks
Eras are used in modern date representations of
dates in, for example, Japan, Korea, China, and
Vietnam. As an example, “2013” is in the Japanese
era “昭和” (Heisei 25).
Attributes
Content Model
<!ELEMENT era (#PCDATA) >
Description
Text, numbers, or special characters
This element may be contained in:
Example
...
<date date-type="received" calendar="Japanese"
iso-8601-date="2013-07-01">
<day>1</day>
<month>7</month>
<year>25</year>
<era>昭和</era>
</date>
...