Some useful links...

Related specifications :

• Business Process Execution Language for Web Services : http://www-106.ibm.com/developerworks/library/ws-bpel/
• Simple Object Access Protocol : http://www.w3.org/TR/SOAP/
• Web Services Description Language : http://www.w3.org/TR/wsdl
• XML Path language : http://www.w3.org/TR/xpath

Some Used projects :

• Hibernate persistence framework : http://hibernate.bluemars.net/
• DOM4J XML framework : http://www.dom4j.org
• Apache Axis SOAP framework : http://ws.apache.org/axis/
• McKoi Java SQL Database : http://www.mckoi.com/database/

Other resources :

• ebPML.org : http://www.ebpml.org
• Workflow Management Coalition : http://www.wfmc.org