validUntil 

provides a date before which the construct being defined will not be
removed.

Attribute Information

Used By

Attribute Group tei:att.deprecated.attribute.validUntil

Source 

<xs:attribute name="validUntil" type="xs:date">
  <xs:annotation>
    <xs:documentation>provides a date before which the construct being defined will not be removed.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample