calendar 

indicates the system or calendar to which the date represented by the
content of this element belongs.

Attribute Information

Used By

Attribute Group tei:att.datable.attribute.calendar

Source 

<xs:attribute name="calendar" type="xs:anyURI">
  <xs:annotation>
    <xs:documentation>indicates the system or calendar to which the date represented by the content of this element belongs.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample