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Maestro D8 Concepts Part 2: The Workflow Engine's Internals

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The Maestro Engine is the mechanism responsible for executing a workflow template by assigning tasks to actors, executing tasks for the engine and providing all of the other logic and glue functionality to run a workflow.  The maestro module is the core module in the Maestro ecosystem and is the module that houses the template, variable, assignment, queue and process schema.  The maestro module also provides the Maestro API for which developers can interact with the engine to do things such as setting/getting process variables, start processes, move the queue along among many other things.

As noted in the preamble for our Maestro D8 Concepts Part 1: Templates and Tasks post, there is jargon used within Maestro to define certain aspects of the engine and data.  The major terms are as follows:

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