With the next release of Imixs-Workflow (3.6.0) the open source workflow engine will support JDK 8 and the new JavaScript Engine Nashorn. The JavaScript engine supports the ECMAScript 5.1 specification. This allows to use new features when executing scripts from the Imixs RulePlugin. The Imixs RulePlugin is part of the workflow engine and allows the execution of business rules defined in a BPMN model. You can find more about the Imixs RuleEngine here. Read also the Rhino Mogration Guide for more details about the new capabilities of the Nashorn Script Engine included in JDK 8.