| Element | Required/Optional | Description |
| <UID> | Required | The unique ID for the assignment. |
| <TaskUID> | Optional | The unique ID for the task. |
| <ResourceUID> | Optional | The unique ID for the resource. |
| <PercentWorkComplete> | Optional | The current status of an assignment, expressed as the percentage of the assignment's work that has been completed. |
| <ActualCost> | Optional | The cost incurred for work already performed by a resource on a task. |
| <ActualFinish> | Optional | The date and time when an assignment was actually completed. |
| <ActualOvertimeCost> | Optional | The cost incurred for overtime work already performed by a resource on a task. |
| <ActualOvertimeWork> | Optional | The actual amount of overtime work already performed by a resource on an assigned task. |
| <ActualStart> | Optional | The date and time that an assignment actually began. |
| <ActualWork> | Optional | The amount of work that has already been done by a resource on a task. |
| <ACWP> | Optional | The costs incurred for work already performed by a resource on a task up to the project status date or today's date; also called actual cost of work performed. |
| <Confirmed> | Optional | Indicates whether a resource assigned to a task has accepted or rejected the task assignment. |
| <Cost> | Optional | The total scheduled (or projected) cost for an assignment. |
| <CostRateTable> | Optional | Indicates which cost rate table to use for a resource on an assignment. |
| <CostVariance> | Optional | The difference between the baseline cost and total cost for an assignment. |
| <CV> | Optional | The difference between how much it should have cost to achieve the current level of completion on the assignment and how much it has actually cost. |
| <Delay> | Optional | The amount of time a resource is to wait after the task start date before starting work on an assignment. |
| <Finish> | Optional | The date and time that an assigned resource is scheduled to complete work on a task. |
| <FinishVariance> | Optional | The difference between an assignment's baseline finish date and its scheduled finish date. |
| <Hyperlink> | Optional | The title or explanatory text for a hyperlink associated with an assignment. |
| <HyperlinkAddress> | Optional | The address for a hyperlink associated with an assignment. |
| <HyperlinkSubAddress> | Optional | The specific location in a document within a hyperlink associated with an assignment. |
| <WorkVariance> | Optional | The difference between an assignment's baseline work and the currently scheduled work. |
| <HasFixedRateUnits> | Optional | Indicates whether an assignment has fixed rate units. |
| <FixedMaterial> | Optional | Indicates whether the consumption of the assigned material resource occurs in a single, fixed amount. |
| <LevelingDelay> | Optional | The amount of time that an assignment is to be delayed from the scheduled start date as a result of resource leveling. |
| <LevelingDelayFormat> | Optional | The format for expressing the duration of the delay. |
| <LinkedFields> | Optional | Indicates whether there are OLE links to the assignment. |
| <Milestone> | Optional | Indicates whether the assignment task is a milestone. |
| <Notes> | Optional | Notes about an assignment. |
| <Overallocated> | Optional | Indicates whether a resource is assigned to more work on a specific task than can be done within the resource's normal working capacity. |
| <OvertimeCost> | Optional | The total overtime cost for a resource assignment. |
| <OvertimeWork> | Optional | The amount of overtime to be performed by a resource on a task; charged at the resource's overtime rate. |
| <RegularWork> | Optional | The total amount of non-overtime work scheduled to be performed by a resource assigned to a task. |
| <RemainingCost> | Optional | The costs associated with completing all remaining scheduled work by any resources on a specific task. |
| <RemainingOvertimeCost> | Optional | The remaining scheduled overtime expense for an assignment. |
| <RemainingOvertimeWork> | Optional | The amount of overtime work that remains on an assignment. |
| <RemainingWork> | Optional | The amount of time required by a resource assigned to a task to complete an assignment. |
| <ResponsePending> | Optional | Indicates whether an answer has been received from a message sent to a resource assigned to a task notifying the resource of the assignment. |
| <Start> | Optional | The date and time that an assigned resource is scheduled to begin working on a task. |
| <Stop> | Optional | The date the assignment was stopped. |
| <Resume> | Optional | The date the assignment was resumed. |
| <StartVariance> | Optional | The difference between an assignment's baseline start date and its currently scheduled start date. |
| <Units> | Optional | The number of units for which a resource is assigned to a task, expressed as a percentage. |
| <UpdateNeeded> | Optional | Indicates whether a TeamUpdate message should be sent to the resource assigned to a task because of changes to the start date, finish date, or resource reassignments. |
| <VAC> | Optional | The variance at completion (VAC) between the baseline cost and the total cost for an assignment on a task. |
| <Work> | Optional | The total amount of work scheduled to be performed by a resource on a task. |
| <WorkContour> | Optional | Indicates how work for an assignment is to be distributed across the duration of the assignment. |
| <BCWS> | Optional | The budgeted cost of work scheduled on the assignment. |
| <BCWP> | Optional | The budgeted cost of the work performed on the assignment to-date. |
| <BookingType> | Optional | Specifies the booking type of the assignment (committed or proposed). |
| <ActualWorkProtected> | Optional | Specifies the duration through which actual work is protected. |
| <ActualOvertimeWorkProtected> | Optional | Specifies the duration through which actual overtime work is protected. |
| <CreationDate> | Optional | The date that the assignment was created. |
| <ExtendedAttribute> | Optional | The value of an extended attribute (custom field). |
| <Baseline> | Optional | The collection of baseline values associated with the assignment. |
| <TimephasedData> | Optional | The time phased data associated with the assignment. |