An Introduction to BPEL standard and its extentions - SoberIT

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The diagram 6.2 shows the sequence of actions executed in loan approval process. WApplicant2Requestcontainer1634Loan approverWeb servie4Approvalcontainer1: Applicant sends message2: Message is stored in request container3 & 4: Invocation of Web serviced5: Message from invocation is stored in approval container6: Result is sent to applicantFigure 6.2: The sequence of actions executed in loan approval processThe BPEL process can be run from BPEL engine which has been available in the market (See section 2.1)7. CONCLUSIONSBPEL is convergence of language features of IBM’s WebService Flow Language (WSFL) andMicrosoft’s XLANG. As an XML-based language, BPEL describes the logic to coordinate Web servicesin a process flow. BPEL was first proposed by Microsoft, IBM and BEA as BPEL4WS in August 2002.On 12 April 2007 BPEL 2.0 was approved as OASIS standard. BPEL process needs to be run via BPELengines, which have been developed by several vendors.BPEL-WS provides a standard language for business orchestration and execution. By using BPEL itmakes integration with business partners easier and more effective, it also leas to further processoptimization.However, BPEL does not cover human interaction. To support a broaden range of scenarios, BPELextensions are required. In June 2007, Active Endpoints, Adobe, BEA, IBM, Oracle and SAP publishedthe BPEL4People specifications, which define an approach for integrating human interactions using WS-BPEL 2.0. The specifications will be sent to OASIS for approval in the near future
Besides excluding people action, BPEL does not interaction between sub-process and parent processeither. In September 2005, IBM and SAP published a white paper called Extensions for Sub-Processes(BPEL-SPE). The paper recognizes the problem of process reused in BPEL, describes differentinvocation scenarios and coordination mechanisms between parent process and sub/process. However, noconsensus on how the problem should be resolved. Many efforts still need to be made before BPEL-SPEspecification is finalized.In order to improve the interaction between IT and business process management, EU founded projectSUPER was kicked off on 1st April 2006. The project intends to adopt Semantic Web Servicestechnology to enable business to use information technology more efficiently and to make cooperationbetween IT and business better.8. REFERENCE[1] Matjaz B. Juric, A Hands-on Introduction to BPEL, accessed 09 DEC 2007,URL: http://www.oracle.com/technology/pub/articles/matjaz_bpel1.html[2] Wikipedia, 2007, Business Process Execution Language, accessed 09 DEC 2007,URL: http://en.wikipedia.org/wiki/Business_Process_Execution_Language[3] 2005, Business Process Executive Language, accessed 09 DEC 2007,URL: http://www.expresscomputeronline.com/20050321/technology05.shtml[4] Christoph Schittko, 2003, XML conference & Exposition, Web Service Orchestration with BPEL,accessed 09 DEC 2007,URL: http://www.idealliance.org/papers/dx_xml03/papers/04-06-01/04-06-01.html[5] Michael Cobban, 2004, What is BPEL and why is it so important to my business? accessed 09 DEC2007,URL: http://www.softcare.com/whitepapers/wp_whatis_bpel.php[6] Oracle White Paper, 2004, Orchestrating Web Sevices: The case for a BPEL Server, accessed 09 DEC2007,URL: http://www.oracle.com/technologies/integration/pdf/bpel-case-whitepaper.pdf[7] 2007, The approval of WS-BPEL as OASIS standard, accessed 09 DEC 2007,URL: http://www.oasis-open.org/cn/news/2007_04_12.htm[8] Ta’id Holmes, 2007, BPEL4People: extending WE-BPEL for People, accessed 09 DEC 2007,URL:http://bpel4people.svn.sourceforge.net/viewvc/%2Acheckout%2A/bpel4people/doc/thesis/thesis.pdf?revision=1,[9] 2007, WS-BPEL Extension for People, accessed 09 DEC 2007,URL:http://www.ibm.com/developerworks/webservices/library/specification/ws-bpel4people/[10] Yoichi Takayama, 2007, WS-BPEL Extension for People, accessed 09 DEC 2007,URL:http://wiki.ramp.org.au/confluence/display/workflow/WS-BPEL+Extension+for+People+(BPEL4People)[11] Wikipedia, 2007, BPEL4People, accessed 09 DEC 2007,URL: http://en.wikipedia.org/wiki/BPEL4People[12] 2007, BPEL4People Specifications Integrate Human Interactions Into Business Process, accessed 09DEC 2007,URL: http://xml.coverpages.org/ni2007-06-25-a.html[13] Ashish Agrawal, etal., 2007, WS-BPEL Extension for People Version 1.0,http://xml.coverpages.org/BPEL4People-V1-200706.pdf[14] Ashish Agrawal, etal., 2007, Web Services Human Task Version1.0, accessed 09 DEC 2007,URL: http://xml.coverpages.org/WS-HumanTask-V1-200706.pdf
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Page 9 and 10: 4.3 Sub-processAs a fragment of BPE
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Page 13 and 14: 5. EU PROJECT SUPERIt happens quite
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