YAWL (Yet Another Workflow Language) is a workflow language based on workflow patterns. The language is supported by a software system that includes an execution engine, a graphical editor and a worklist handler. The system is available as Open source software under the LGPL license.

A yawl (from Dutch jol) is a two-masted sailing craft similar to a sloop or cutter but with an additional mizzenmast (or mizzen mast) located well aft of the main mast, often right on the transom, or aft of the rudder post if the vessel has an inboard hung rudder. (A vessel with a larger mizzen located in a more forward position is called a ketch; see below: Yawl versus ketch.) The mizzen sail (smaller than the mainsail) is hoisted on the mizzen mast.