VL File Format (.vl)

Overview

A .vl file is an XML document encoding a visual dataflow program for vvvv gamma. Key elements:

• Document — root element, contains dependencies and one top-level Patch
• Patch — container for visual elements (Nodes, Pads, Links, Canvases)
• Node — operation calls, type definitions, or regions
• Pin — input/output on a Node (defined at definition site)
• Pad — visual data element (IOBox) for displaying/editing values
• Link — connects two endpoints by referencing their IDs
• Canvas — visual grouping container (no logical scope)
• ProcessDefinition — lifecycle definition (Create, Update) via Fragments
• Slot — state field within a type definition

XML Root and Namespaces