In some cases, rather than viewing all workflow tasks, you may to want to view all existing workflow instances. The atg.workflow.servlet.WorkflowInstanceQueryDroplet servlet bean class provides this capability. For example, suppose you have a workflow type for managing orders, and you want view all the outstanding orders and their status. Suppose, also, that an order workflow involves several simultaneously active tasks. A query made using the WorkflowTaskQueryDroplet might return multiple active tasks for each order, but the WorkflowInstanceQueryDroplet will return a single entry for each workflow instance. (The registration workflow does not use an instance of this servlet bean, because a registration workflow can have only one active task at a time.)