<xs:attributeGroup name="TimeWindowGroup">
    <xs:annotation>
        <xs:documentation xml:lang="en">Total time span covered by this availability request (from the earliest arrival to the latest departure)</xs:documentation>
    </xs:annotation>
    <xs:attribute name="EarliestDate" type="DateOrDateTimeType" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">The earliest ending date/time for the availability requested, expressed in dateTime format as prescribed by ISO 8601.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="LatestDate" type="DateOrDateTimeType" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">The latest ending date/time for the availability requested, expressed in dateTime format as prescribed by ISO 8601.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="DOW" type="DayOfWeekType" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">The Day of Week of the starting date for the availability requested. Enumerated values of StartDOW are the seven days of the week: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
</xs:attributeGroup>