$Id$ Commons SCXML Package Version 0.6 Release Notes INTRODUCTION: Commons SCXML 0.6 primarily contains new features, along with a handful of bug fixes. See about section below for general information on Commons SCXML. IMPORTANT NOTES: o Commons SCXML v0.6 requires Commons Digester v1.8 (mandatory update) o The recommended version of Commons JEXL is now v1.1 and the recommended version of Commons Logging is v1.1 o Starting v0.6, all SCXML elements must strictly belong to the correct namespace with the following URI (case sensitive): http://www.w3.org/2005/07/scxml NEW FEATURES: o The entire Commons SCXML object model as well as the SCXMLExecutor instances are now serializable. This is particularly useful in web environments for session persistence and clustering. o There is improved support for XML namespaces in SCXML documents. Custom actions may be defined in user-specified namespaces. o Deferred XPath expression evaluation, in context of interaction with elements, has improved. It is now possible to use namespace prefixed XPath expressions based on prefixes used in the document. o The SCXMLExecutor instances now provide some element of thread-safety. Firing events on a state machine executor instance or reseting it are synchronized operations. The underlying state machine needs to model any race conditions correctly. DEPRECATIONS: All deprecations introduced in this version are scheduled for removal in v1.0 of the library. o [org.apache.commons.scxml.io.SCXMLDigester] The custom digester rules in this class are deprecated. They should not have been part of the public API to begin with. o [org.apache.commons.scxml.ErrorReporter] All String constants in this class have been deprecated. Use constants with the same names in org.apache.commons.scxml.semantics.ErrorConstants instead. o [org.apache.commons.scxml.model.Invoke] The method getParams() returning a java.util.Map has been deprecated. Use the method params() returning a java.util.List instead. See Javadocs for details. BUG FIXES: o [SCXML-21] Delay is not processed for element with default "targettype". o [SCXML-14] Allow target of a transition to be omitted. OTHER CHANGES: o [SCXML-31] and now log new values. ABOUT COMMONS SCXML: The Commons SCXML (State Chart XML) project provides a generic state-machine based execution environment. It borrows most semantics from its namesake Working Draft at the W3C. Anything that can be represented as a UML state chart -- business process flows, view navigation bits, interaction or dialog management, and many more -- can leverage the Commons SCXML library. The library abstracts out the environment interfaces, and can be used in numerous server-side and client-side runtimes. Please visit the website for project information and documentation: http://jakarta.apache.org/commons/scxml/