General

These nodes provide scaffolding for the workflow.

Start

• Gathers global state and injects it into workflow
• Exposes settings to workflow
• Usually first node run in any workflow
• Other nodes without inputs can run before

Finish

• May or may not be last node run
• Returns data back to the global state
• The conversation must be an extension of the input
• Other nodes may continue to run after Finish if not on its path

Subgraph

• See Subgraphs page for details
• Contains an embedded workflow
• Can be Simple or Iterative
• Double-click icon to edit
• Control palette shows subgraph stack instead of workflow selector
  • Click on a higher level to navigate back
  • Level names from subgraph titles
• Double-click subgraph title to change
• Can customize inputs/outputs via Start and Finish nodes

Preview

• Transient display for wire values
• Has no external effect
  • Except as a failure handler
  • Will swallow errors and display them on canvas
• Values are not persisted

Output

• Emits documents as a result of running the workflow
• In the UI, listed in the Outputs tab
• Must be saved individually
• Runner can print to console or save to disk

Comment

• No functionality
• Only for documentation and communication