| AbsoluteCutoff | Defines the absolute deadline. Either this or the offset attributes may be used. |
| Duration | The duration datatype represents a combination of year, month, day and time values representing a single duration of time, encoded as a single string. |
| End | The ending value of the time span. |
| EndDateExtensionIndicator | If true, this indicates that the block has no tangible end date. The block continues indefinitely. |
| OffsetCalculationMode | This indicates how the offset period is applied for the release back to general inventory of unbooked rooms in the inventory block . |
| OffsetDuration | The units of time, e.g.: days, hours, etc., that apply to the deadline. |
| Start | The starting value of the time span. |