## Uses of Interface
org.activiti.engine.history.HistoricData

- Packages that use HistoricData
  Package | Description
  --- | ---
  org.activiti.engine.history | Classes related to the `HistoryService`.
  org.activiti.engine.task | Classes related to the `TaskService`.

- - ### Uses of HistoricData in org.activiti.engine.history

    Subinterfaces of HistoricData in org.activiti.engine.history
    Modifier and Type | Interface and Description
    --- | ---
    `interface` | `HistoricActivityInstance` Represents one execution of an activity and it's stored permanent for statistics, audit and other business intelligence purposes.
    `interface` | `HistoricDetail` Base class for all kinds of information that is related to either a `HistoricProcessInstance` or a `HistoricActivityInstance`.
    `interface` | `HistoricFormProperty` A single field that was submitted in either a start form or a task form.
    `interface` | `HistoricTaskInstance` Represents a historic task instance (waiting, finished or deleted) that is stored permanent for statistics, audit and other business intelligence purposes.
    `interface` | `HistoricVariableInstance` A single process variable containing the last value when its process instance has finished.
    `interface` | `HistoricVariableUpdate` Update of a process variable.

    Methods in org.activiti.engine.history that return types with arguments of type HistoricData
    Modifier and Type | Method and Description
    --- | ---
    `List<HistoricData>` | ProcessInstanceHistoryLog.`getHistoricData()` The trail of data, ordered by date (ascending).

  - ### Uses of HistoricData in org.activiti.engine.task

    Subinterfaces of HistoricData in org.activiti.engine.task
    Modifier and Type | Interface and Description
    --- | ---
    `interface` | `Comment` User comments that form discussions around tasks.

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