| <!-- |
| Copyright 2005 The Apache Software Foundation |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| <html> |
| <head> |
| <title>Status File for Jakarta Commons "SCXML" Component</title> |
| </head> |
| <body bgcolor="white"> |
| |
| |
| <div align="center"> |
| <h1>The Jakarta Commons <em>SCXML</em> Component</h1> |
| $Id$<br /> |
| <a href="#Introduction">[Introduction]</a> |
| <a href="#Dependencies">[Dependencies]</a> |
| <a href="#Release Info">[Release Info]</a> |
| <a href="#Committers">[Committers]</a> |
| <a href="#Action Items">[Action Items]</a> |
| <br /><br /> |
| </div> |
| |
| |
| <a name="Introduction"></a> |
| <h3>1. INTRODUCTION</h3> |
| |
| <p>The World Wide Web Consortium (W3C) Voice Browser Working Group |
| recently announced the publication of the first |
| <a href="http://www.w3.org/TR/2005/WD-scxml-20050705/">Working Draft of |
| State Chart XML</a> (SCXML). SCXML provides a generic state-machine |
| based execution environment based on CCXML and Harel State Tables. |
| <em>Commons SCXML</em> is a reference implementation SCXML engine. |
| </p> |
| |
| |
| <a name="Dependencies"></a> |
| <h3>2. DEPENDENCIES</h3> |
| |
| <p>The <em>SCXML</em> component is dependent upon the following external |
| components for development and use:</p> |
| <ul> |
| <li>Apache Jakarta |
| <a href="http://jakarta.apache.org/commons/digester/">Commons |
| Digester</a></li> |
| <li>Apache Jakarta |
| <a href="http://jakarta.apache.org/commons/logging/">Commons |
| Logging</a></li> |
| <li><a href="http://java.sun.com/j2se">Java Development Kit</a> |
| (Version 1.4 or later)</li> |
| </ul> |
| |
| <p>JUnit is used as the testing framework</p> |
| <ul> |
| <li><a href="http://www.junit.org">JUnit Testing Framework</a> |
| (Version 3.7 or later) - for unit tests only, not required |
| for deployment</li> |
| </ul> |
| |
| <p>Expression evaluation in SCXML documents is environment specific, |
| the expression evaluator and context of evaluation is envisioned to be |
| "pluggable". The existing code provides an example for the |
| servlet/JSP environment which needs: </p> |
| <ul> |
| <li>Apache Jakarta |
| <a href="http://jakarta.apache.org/commons/el/">Commons EL</a></li> |
| <li><a href="http://java.sun.com/products/servlet/">Servlet 2.4</a></li> |
| <li><a href="http://java.sun.com/products/jsp/">JSP 2.0</a></li> |
| </ul> |
| </p> |
| |
| <a name="Release Info"></a> |
| <h3>3. RELEASE INFO</h3> |
| |
| <p>Current Release: SCXML is yet to be released.</p> |
| |
| <p>Planned Next Release: See the |
| <a href="#Action Items">Action Items</a> list for tasks that need to be |
| completed prior to this release.</p> |
| |
| |
| <a name="Committers"></a> |
| <h3>4. COMMITTERS</h3> |
| |
| <p>The following individuals are the primary developers and maintainers of this |
| component. Developers who plan to use <em>SCXML</em> in their own |
| projects are encouraged to collaborate on the future development of this |
| component to ensure that it continues to meet a variety of needs.</p> |
| <ul> |
| <li><a href="mailto:rahul AT apache.org">Rahul Akolkar</a></li> |
| <li><a href="mailto:martinc AT apache.org">Martin Cooper</a></li> |
| <li>Fancy volunteering? We need you!</li> |
| </ul> |
| |
| |
| <a name="Action Items"></a> |
| <h3>5. ACTION ITEMS</h3> |
| |
| <p>The SCXML engine implementation is under development. The major items that are |
| yet unimplemented are (Section numbers from Working Draft above):</p> |
| |
| <ul> |
| <li>Multiple (simultaneous) targets for a single transition (Section 3.3.1) </li> |
| <li>JOIN (Section 4.3) </li> |
| <li>SYNCH (Section 4.4) </li> |
| </ul> |
| |
| </body> |
| </html> |
