Workflow
Liferay DXP ships with a workflow engine that allows reviewing and approving content such as Blogs, Web Content, or Wikis before publication. Define any number of business processes/workflows, deploy them, and manage them through a portal interface.
Developer Guide
Implementing Workflow
Implementing a Custom SLA Calendar
Crafting XML Workflow Definitions
Using the Script Engine in Workflow
Workflow Definition Node Reference
Workflow Task Node Reference
Workflow Notification Template Variables
Creating a Condition Evaluator
Creating an Action Executor
Working with Workflow Context
APIs