DateDurationType 

A value that can accomodate a real xs:duration or a positive number.
For the number to have a meaning, it is usually associated with an element of type
durationType

Simple Type Information

Used By

Attributes DurationGroup/@Value, DurationWindowType/@After, DurationWindowType/@Before

Source 

<xs:simpleType name="DateDurationType">
  <xs:annotation>
    <xs:documentation>A value that can accomodate a real xs:duration or a positive number. For the number to have a meaning, it is usually associated with an element of type durationType</xs:documentation>
  </xs:annotation>
  <xs:union memberTypes="xs:nonNegativeInteger xs:duration"/>
</xs:simpleType>