Tokens
Actions that produce data — such as Capture, Process File, Read Barcode, and Spreadsheet Lookup — make that data available to subsequent actions via tokens. A token is referenced by its action name in curly braces. For example if you name a Capture Action "Recto" then you can later reference that capture with {Recto}.
Some actions produce structured tokens with named attributes, accessible with dot notation. For example a capture action named Recto can be referenced as {Recto.path}, {Recto.name}.
This token system is how more complex pipelines are wired together without any scripting. There are only a few uses for tokens in the currently available Actions in the Sequencer. But as we add additional Actions they will power more flexible workflows.