RoomGroup 

For a room or multiple rooms

Element Group Information

Model

Room{0,1} , Rooms{0,1}
Children: Room, Rooms

Used By

Complex Types AccomodationType, CabinType, HotelType, RestaurantType, RoomBedroomType, RoomCollectionType, RoomKitchenType, RoomMeetingRoomType, RoomStorageType, RoomType, SegmentDocType, SegmentDocVisaType, SegmentStayType, SegmentSurfaceType, SegmentWaterType, ShipType
Element Group LocationRangeGroup

Source 

<xs:group name="RoomGroup">
  <xs:annotation>
    <xs:documentation>For a room or multiple rooms</xs:documentation>
  </xs:annotation>
  <xs:sequence>
    <xs:annotation>
      <xs:documentation>An element + a collection to specify a default room for a stay + alternatives</xs:documentation>
    </xs:annotation>
    <xs:element ref="Room" minOccurs="0"/>
    <xs:element ref="Rooms" minOccurs="0"/>
  </xs:sequence>
</xs:group>