Task instance

A task instance is a task created for an user based on a  task definition. A single task definition can generate several task instances. A task instance is created when a workflow instance  is run and reaches to a point where a task must be created, based on a task definition. At that time, the task instance is created for a specified user. Each user has a list of his/her pending task instances. Once the task is finished it is removed from the list of pending tasks. There is still an option for listing the closed tasks, in the task list window. Each task instance has its own record in the database. Even if the task is closed, the record is not deleted.