Packages 
Package Description
org.flowable.engine
Public API of the Flowable engine.

Typical usage of the API starts by the creation of a ProcessEngineConfiguration (typically based on a configuration file), from which a ProcessEngine can be obtained.

Through the services obtained from such a ProcessEngine, BPM and workflow operation can be executed:

RepositoryService: Manages Deployments.
RuntimeService: For starting and searching ProcessInstances.
TaskService: Exposes operations to manage human (standalone) tasks, such as claiming, completing and assigning tasks.
IdentityService: Used for managing users, groups and the relations between them.
ManagementService: Exposes engine administration and maintenance operations, which have no relation to the runtime exection of business processes.
HistoryService: Exposes information about ongoing and past process instances.
FormService: Access to form data and rendered forms for starting new process instances and completing tasks.
org.flowable.engine.app  
org.flowable.engine.cfg  
org.flowable.engine.compatibility  
org.flowable.engine.debug  
org.flowable.engine.delegate
Interfaces used to include Java code in a process as the behavior of an activity or as a listener to process events with JavaDelegates.
org.flowable.engine.delegate.event  
org.flowable.engine.delegate.event.impl  
org.flowable.engine.delegate.variable  
org.flowable.engine.dynamic  
org.flowable.engine.event  
org.flowable.engine.form
Classes related to the FormService.
org.flowable.engine.history
Classes related to the HistoryService.
org.flowable.engine.impl
API implementation classes, which shouldn't directly be used by end-users.
org.flowable.engine.interceptor  
org.flowable.engine.logging  
org.flowable.engine.migration  
org.flowable.engine.parse  
org.flowable.engine.repository
Classes related to the RepositoryService.
org.flowable.engine.runtime
Classes related to the RuntimeService.
org.flowable.engine.task
Classes related to the TaskService.
org.flowable.engine.test
Helper classes for testing processes.
org.flowable.engine.test.impl.logger  
org.flowable.engine.test.mock  
org.flowable.engine.test.profiler