| Direction | An optional string value used to indicate the compass point(s) direction, e.g.: S, SE (South, Southeast), FROM the Reference Point TO the hotel location if the search is not a full circumference from the reference point. |
| Distance | An optional attribute indicating the distance to/from a reference point. When used in conjunction with DistanceMax, this represents the minimum distance.Used for Numeric Strings, length 1 to 16. |
| DistanceMax | An optional attribute indicating the maximum distance to/from a reference point.Used for Numeric Strings, length 1 to 16. |
| DistanceMeasure | When the Distance attribute contains a value, (presumably a numerical value), the unit of measure is a string value that indicate what units are used for the value. |
| UnitOfMeasureCode | The unit of measure in a code format. Refer to OpenTravel Code List Unit of Measure Code (UOM). |