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'''Connections'''. A connection includes the information necessary to connect to a particular data source. Tasks can reference the connection by its name, allowing the details of the connection to be changed or configured at runtime.
'''Tasks'''. A task is an atomic work unit that performs some action. There are a couple of dozen tasks that ship in the box, ranging from the file system task (which can copy or move files) to the data transformation task. The data
'''Precedence Constraints'''. Tasks are linked by precedence constraints. The precedence constraint preceding a particular task must be met before that task executes. The runtime supports executing tasks in parallel if their precedence constraints so allow. Constraints may otherwise allow different paths of execution depending on the success or failure of other tasks. Together with the tasks, precedence constraints comprise the '''workflow''' of the package.
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