[galaxy-dev] What is the difference between the table stored_workflow and workflow in Galaxy?

Greetings all, These are various tables related to workflow in Galaxy that I found in the database. There are very similar tables like: workflow and stored_workflow, workflow_step_tag_association, stored_workflow_tag_association etc. I want to know what does specific table holds. What are the fundamental differences between workflow and stored_workflow? Is there Galaxy documentation available for it? If so, please provide me the link. Cheers, Sachit