Web Services Business Process Execution Language - Revision history

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	'''Web Services Business Process Execution Language''' ('''WS-BPEL''', sometimes referred to as '''Business Process Execution Language''' or '''BPEL''') is an XML-based language used in the specification of executable and abstract business processes.<ref name="ManascoBPEL">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/new-view-of-bpel/124 \|title=New view of BPEL \|author=Manasco, Britton \|work=ZDNet \|publisher=CBS Interactive \|date=11 January 2005 \|accessdate=19 August 2014}}</ref> WS-BPEL enables "users to describe business process activities as Web services and define how they can be connected to accomplish specific tasks."<ref name="CP_BPEL4WS">{{cite web \|url=http://xml.coverpages.org/bpel4ws.html \|title=Business Process Execution Language for Web Services (BPEL4WS) \|author=Cover, Robin \|work=Cover Pages \|date=01 July 2008 \|accessdate=19 August 2014}}</ref>		'''Web Services Business Process Execution Language''' ('''WS-BPEL''', sometimes referred to as '''Business Process Execution Language''' or '''BPEL''') is an [[XML]]-based language used in the specification of executable and abstract business processes.<ref name="ManascoBPEL">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/new-view-of-bpel/124 \|title=New view of BPEL \|author=Manasco, Britton \|work=ZDNet \|publisher=CBS Interactive \|date=11 January 2005 \|accessdate=19 August 2014}}</ref> WS-BPEL enables "users to describe business process activities as Web services and define how they can be connected to accomplish specific tasks."<ref name="CP_BPEL4WS">{{cite web \|url=http://xml.coverpages.org/bpel4ws.html \|title=Business Process Execution Language for Web Services (BPEL4WS) \|author=Cover, Robin \|work=Cover Pages \|date=01 July 2008 \|accessdate=19 August 2014}}</ref>

	BPEL is an orchestration language and not a choreography language. Orchestration languages specify an executable process that involves message exchanges with other systems, such that the message exchange sequences are controlled by the orchestration designer. A choreography language specifies a protocol for peer-to-peer interactions, defining for example the legal sequences of messages exchanged with the purpose of guaranteeing interoperability. Such a protocol is not directly executable; it simply allows many different processes to comply with it. Choreography can be realized by writing an orchestration for each peer involved in it.<ref name="ReynoldsOC">{{cite web \|url=https://weblogs.java.net/blog/johnreynolds/archive/2006/01/service_orchest.html \|title=Service Orchestration vs. Service Choreography \|author=Reynolds, John \|work=Java.net \|publisher=Oracle \|date=19 January 2006 \|accessdate=19 August 2014}}</ref><ref name="DijkmanServ">{{cite journal \|url=http://eprints.qut.edu.au/622/ \|journal=International Journal of Cooperative Information Systems \|title=Service-oriented Design: A Multi-viewpoint Approach \|author=Dijkman, Remco; Dumas, Marlon \|volume=13 \|issue=4 \|year=2004 \|pages=337–378 \|doi=10.1142/S0218843004001012 \|accessdate=19 August 2014}}</ref>		BPEL is an orchestration language and not a choreography language. Orchestration languages specify an executable process that involves message exchanges with other systems, such that the message exchange sequences are controlled by the orchestration designer. A choreography language specifies a protocol for peer-to-peer interactions, defining for example the legal sequences of messages exchanged with the purpose of guaranteeing interoperability. Such a protocol is not directly executable; it simply allows many different processes to comply with it. Choreography can be realized by writing an orchestration for each peer involved in it.<ref name="ReynoldsOC">{{cite web \|url=https://weblogs.java.net/blog/johnreynolds/archive/2006/01/service_orchest.html \|title=Service Orchestration vs. Service Choreography \|author=Reynolds, John \|work=Java.net \|publisher=Oracle \|date=19 January 2006 \|accessdate=19 August 2014}}</ref><ref name="DijkmanServ">{{cite journal \|url=http://eprints.qut.edu.au/622/ \|journal=International Journal of Cooperative Information Systems \|title=Service-oriented Design: A Multi-viewpoint Approach \|author=Dijkman, Remco; Dumas, Marlon \|volume=13 \|issue=4 \|year=2004 \|pages=337–378 \|doi=10.1142/S0218843004001012 \|accessdate=19 August 2014}}</ref>

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	[[Category:Software terms]]		[[Category:Software and hardware terms]]

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	==References==		==References==
	<references />		<references />

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			[[Category:Software terms]]

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	* a scoping system to allow the encapsulation of logic with local variables, fault-handlers, compensation-handlers, and event-handlers; and		* a scoping system to allow the encapsulation of logic with local variables, fault-handlers, compensation-handlers, and event-handlers; and
	* serialized scopes to control concurrent access to variables.		* serialized scopes to control concurrent access to variables.

			An additional aim of BPEL was to enable "programming in the large." The concepts of "programming in the large" and "programming in the small" distinguish between two aspects of writing the type of long-running asynchronous processes that one typically sees in business processes<ref name="BPELHist">{{cite web \|url=https://www.oasis-open.org/committees/download.php/23068/WS-BPEL%20Technical%20Overview%20for%20Developers%20and%20Architects%20-%20Part%201%20%28Frank%20Ryan%29.pdf \|format=PDF \|title=WS-BPEL 2.0 \|author=Ryan, Frank \|publisher=OASIS \|date=2007 \|accessdate=19 August 2014}}</ref>:

			* Programming in the large generally refers to the high-level state transition interactions of a process; BPEL refers to this concept as an abstract process, which represents a set of publicly observable behaviors in a standardized fashion. An abstract process includes information such as when to wait for messages, when to send messages, and when to compensate for failed transactions.

			* Programming in the small, in contrast, deals with short-lived programmatic behavior, often executed as a single transaction and involving access to local logic and resources such as files, databases, etc.

	==History==		==History==
	By March 2001, IBM and Microsoft had each already defined their own, fairly similar "programming in the large" languages: WSFL (Web Services Flow Language) and XLANG, respectively.<ref name="WSFLNew">{{cite web \|url=http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|archiveurl=https://web.archive.org/web/20090306224354/http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|title=WWW10: IBM readies Web services workflow proposal \|author=Lawson, Stephen \|work=InfoWorld \|publisher=IDG Network \|date=03 May 2001 \|archivedate=06 March 2009 \|accessdate=19 August 2014}}</ref><ref name="XLANGNew">{{cite web \|url=http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|archiveurl=https://web.archive.org/web/20010421152412/http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|title=Talking in XLANG \|author=Anderson, Eric Binary \|work=ENT Online \|publisher=101 Communications \|date=22 November 2000 \|archivedate=21 April 2001 \|accessdate=19 August 2014}}</ref><ref name="BPELHist"~~>{{cite web \|url=https:~~//www.oasis-open.org/committees/download.php/23068/WS-BPEL%20Technical%20Overview%20for%20Developers%20and%20Architects%20-%20Part%201%20%28Frank%20Ryan%29.pdf \|format=PDF \|title=WS-BPEL 2.0 \|author=Ryan, Frank \|publisher=OASIS \|date=2007 \|accessdate=19 August 2014}}</ref> Both companies, however, decided in July 2002 to combine these languages into a new language, BPEL4WS.<ref name="BPELHist" />		By March 2001, IBM and Microsoft had each already defined their own, fairly similar "programming in the large" languages: WSFL (Web Services Flow Language) and XLANG, respectively.<ref name="WSFLNew">{{cite web \|url=http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|archiveurl=https://web.archive.org/web/20090306224354/http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|title=WWW10: IBM readies Web services workflow proposal \|author=Lawson, Stephen \|work=InfoWorld \|publisher=IDG Network \|date=03 May 2001 \|archivedate=06 March 2009 \|accessdate=19 August 2014}}</ref><ref name="XLANGNew">{{cite web \|url=http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|archiveurl=https://web.archive.org/web/20010421152412/http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|title=Talking in XLANG \|author=Anderson, Eric Binary \|work=ENT Online \|publisher=101 Communications \|date=22 November 2000 \|archivedate=21 April 2001 \|accessdate=19 August 2014}}</ref><ref name="BPELHist" /> Both companies, however, decided in July 2002 to combine these languages into a new language, BPEL4WS.<ref name="BPELHist" />

	In April 2003, BEA Systems, IBM, Microsoft, SAP, and Siebel Systems submitted BPEL4WS 1.1 to OASIS for standardization via the Web Services BPEL Technical Committee.<ref name="OASISBPEL">{{cite web \|url=http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|archiveurl=https://web.archive.org/web/20080724032537/http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|title=OASIS to get BPEL4WS jurisdiction \|author=Krill, Paul \|work=InfoWorld \|publisher=IDG Network \|date=15 April 2003 \|archivedate=24 July 2008 \|accessdate=19 August 2014}}</ref> Although "BPEL4WS" appeared as both a 1.0 and 1.1 version, the OASIS WS-BPEL technical committee voted on September 14, 2004 to name their spec "WS-BPEL 2.0."<ref name="ChorHist">{{cite web \|url=http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|archiveurl=https://web.archive.org/web/20070721002815/http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|title=WS BPEL issues list \|publisher=Choreology Ltd \|date=28 August 2006 \|archivedate=21 July 2007 \|accessdate=19 August 2014}}</ref> On April 12, 2007, version 2.0 of the standard was approved by OASIS.<ref name="OASIS2.0">{{cite web \|url=http://xml.coverpages.org/WS-BPELv20-Standard.html \|title=Members Approve Web Services Business Process Execution Language (WS-BPEL) as OASIS Standard \|work=Cover Pages \|author=Cover, Robin \|date=12 April 2007 \|accessdate=19 August 2014}}</ref> Public adoption of the new 2.0 standard was mixed, however, with some criticizing the "considerable differences to its previous 1.1 version."<ref name="McKendrickBPEL">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/bpel-bopped-for-the-umpteenth-time/717 \|title=BPEL bopped, for the umpteenth time \|author=McKendrick, Joe \|work=ZDNet \|publisher=CBS Interactive \|date=29 September 2006 \|accessdate=19 August 2014}}</ref>		In April 2003, BEA Systems, IBM, Microsoft, SAP, and Siebel Systems submitted BPEL4WS 1.1 to OASIS for standardization via the Web Services BPEL Technical Committee.<ref name="OASISBPEL">{{cite web \|url=http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|archiveurl=https://web.archive.org/web/20080724032537/http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|title=OASIS to get BPEL4WS jurisdiction \|author=Krill, Paul \|work=InfoWorld \|publisher=IDG Network \|date=15 April 2003 \|archivedate=24 July 2008 \|accessdate=19 August 2014}}</ref> Although "BPEL4WS" appeared as both a 1.0 and 1.1 version, the OASIS WS-BPEL technical committee voted on September 14, 2004 to name their spec "WS-BPEL 2.0."<ref name="ChorHist">{{cite web \|url=http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|archiveurl=https://web.archive.org/web/20070721002815/http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|title=WS BPEL issues list \|publisher=Choreology Ltd \|date=28 August 2006 \|archivedate=21 July 2007 \|accessdate=19 August 2014}}</ref> On April 12, 2007, version 2.0 of the standard was approved by OASIS.<ref name="OASIS2.0">{{cite web \|url=http://xml.coverpages.org/WS-BPELv20-Standard.html \|title=Members Approve Web Services Business Process Execution Language (WS-BPEL) as OASIS Standard \|work=Cover Pages \|author=Cover, Robin \|date=12 April 2007 \|accessdate=19 August 2014}}</ref> Public adoption of the new 2.0 standard was mixed, however, with some criticizing the "considerable differences to its previous 1.1 version."<ref name="McKendrickBPEL">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/bpel-bopped-for-the-umpteenth-time/717 \|title=BPEL bopped, for the umpteenth time \|author=McKendrick, Joe \|work=ZDNet \|publisher=CBS Interactive \|date=29 September 2006 \|accessdate=19 August 2014}}</ref>

Shawndouglas: Updated content

2014-08-19T20:52:26Z

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	'''Web Services Business Process Execution Language''' ('''WS-BPEL''', sometimes referred to as '''Business Process Execution Language''' or '''BPEL''') is an XML-based language used in the specification of executable and abstract business processes.<ref name="ManascoBPEL">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/new-view-of-bpel/124 \|title=New view of BPEL \|author=Manasco, Britton \|publisher=~~ZDNet~~ \|date=11 January 2005 \|accessdate=19 August 2014}}</ref> WS-BPEL enables "users to describe business process activities as Web services and define how they can be connected to accomplish specific tasks."<ref name="CP_BPEL4WS">{{cite web \|url=http://xml.coverpages.org/bpel4ws.html \|title=Business Process Execution Language for Web Services (BPEL4WS) \|author=Cover, Robin \|work=Cover Pages \|date=01 July 2008 \|accessdate=19 August 2014}}</ref>		'''Web Services Business Process Execution Language''' ('''WS-BPEL''', sometimes referred to as '''Business Process Execution Language''' or '''BPEL''') is an XML-based language used in the specification of executable and abstract business processes.<ref name="ManascoBPEL">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/new-view-of-bpel/124 \|title=New view of BPEL \|author=Manasco, Britton \|work=ZDNet \|publisher=CBS Interactive \|date=11 January 2005 \|accessdate=19 August 2014}}</ref> WS-BPEL enables "users to describe business process activities as Web services and define how they can be connected to accomplish specific tasks."<ref name="CP_BPEL4WS">{{cite web \|url=http://xml.coverpages.org/bpel4ws.html \|title=Business Process Execution Language for Web Services (BPEL4WS) \|author=Cover, Robin \|work=Cover Pages \|date=01 July 2008 \|accessdate=19 August 2014}}</ref>

	BPEL is an orchestration language and not a choreography language. Orchestration languages specify an executable process that involves message exchanges with other systems, such that the message exchange sequences are controlled by the orchestration designer. A choreography language specifies a protocol for peer-to-peer interactions, defining for example the legal sequences of messages exchanged with the purpose of guaranteeing interoperability. Such a protocol is not directly executable; it simply allows many different processes to comply with it. Choreography can be realized by writing an orchestration for each peer involved in it.<ref name="ReynoldsOC">{{cite web \|url=https://weblogs.java.net/blog/johnreynolds/archive/2006/01/service_orchest.html \|title=Service Orchestration vs. Service Choreography \|author=Reynolds, John \|work=Java.net \|publisher=Oracle \|date=19 January 2006 \|accessdate=19 August 2014}}</ref><ref name="DijkmanServ">{{cite journal \|url=http://eprints.qut.edu.au/622/ \|journal=International Journal of Cooperative Information Systems \|title=Service-oriented Design: A Multi-viewpoint Approach \|author=Dijkman, Remco; Dumas, Marlon \|volume=13 \|issue=4 \|year=2004 \|pages=337–378 \|doi=10.1142/S0218843004001012 \|accessdate=19 August 2014}}</ref>		BPEL is an orchestration language and not a choreography language. Orchestration languages specify an executable process that involves message exchanges with other systems, such that the message exchange sequences are controlled by the orchestration designer. A choreography language specifies a protocol for peer-to-peer interactions, defining for example the legal sequences of messages exchanged with the purpose of guaranteeing interoperability. Such a protocol is not directly executable; it simply allows many different processes to comply with it. Choreography can be realized by writing an orchestration for each peer involved in it.<ref name="ReynoldsOC">{{cite web \|url=https://weblogs.java.net/blog/johnreynolds/archive/2006/01/service_orchest.html \|title=Service Orchestration vs. Service Choreography \|author=Reynolds, John \|work=Java.net \|publisher=Oracle \|date=19 January 2006 \|accessdate=19 August 2014}}</ref><ref name="DijkmanServ">{{cite journal \|url=http://eprints.qut.edu.au/622/ \|journal=International Journal of Cooperative Information Systems \|title=Service-oriented Design: A Multi-viewpoint Approach \|author=Dijkman, Remco; Dumas, Marlon \|volume=13 \|issue=4 \|year=2004 \|pages=337–378 \|doi=10.1142/S0218843004001012 \|accessdate=19 August 2014}}</ref>
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	==History==		==History==
	By March 2001, IBM and Microsoft had each already defined their own, fairly similar "programming in the large" languages: WSFL (Web Services Flow Language) and XLANG, respectively.<ref name="WSFLNew">{{cite web \|url=http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|archiveurl=https://web.archive.org/web/20090306224354/http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|title=WWW10: IBM readies Web services workflow proposal \|author=Lawson, Stephen \|work=InfoWorld \|publisher=IDG Network \|date=03 May 2001 \|archivedate=06 March 2009 \|accessdate=19 August 2014}}</ref><ref name="XLANGNew">{{cite web \|url=http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|archiveurl=https://web.archive.org/web/20010421152412/http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|title=Talking in XLANG \|author=Anderson, Eric Binary \|work=ENT Online \|publisher=101 Communications \|date=22 November 2000 \|archivedate=21 April 2001 \|accessdate=19 August 2014}}</ref><ref name="BPELHist">{{cite web \|url=https://www.oasis-open.org/committees/download.php/23068/WS-BPEL%20Technical%20Overview%20for%20Developers%20and%20Architects%20-%20Part%201%20%28Frank%20Ryan%29.pdf \|format=PDF \|title=WS-BPEL 2.0 \|author=Ryan, Frank \|publisher=OASIS \|date=2007 \|accessdate=19 August 2014}}</ref> Both companies, however, decided in July 2002 to combine these languages into a new language, BPEL4WS~~, submitting~~ .<ref name="BPELHist" />		By March 2001, IBM and Microsoft had each already defined their own, fairly similar "programming in the large" languages: WSFL (Web Services Flow Language) and XLANG, respectively.<ref name="WSFLNew">{{cite web \|url=http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|archiveurl=https://web.archive.org/web/20090306224354/http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|title=WWW10: IBM readies Web services workflow proposal \|author=Lawson, Stephen \|work=InfoWorld \|publisher=IDG Network \|date=03 May 2001 \|archivedate=06 March 2009 \|accessdate=19 August 2014}}</ref><ref name="XLANGNew">{{cite web \|url=http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|archiveurl=https://web.archive.org/web/20010421152412/http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|title=Talking in XLANG \|author=Anderson, Eric Binary \|work=ENT Online \|publisher=101 Communications \|date=22 November 2000 \|archivedate=21 April 2001 \|accessdate=19 August 2014}}</ref><ref name="BPELHist">{{cite web \|url=https://www.oasis-open.org/committees/download.php/23068/WS-BPEL%20Technical%20Overview%20for%20Developers%20and%20Architects%20-%20Part%201%20%28Frank%20Ryan%29.pdf \|format=PDF \|title=WS-BPEL 2.0 \|author=Ryan, Frank \|publisher=OASIS \|date=2007 \|accessdate=19 August 2014}}</ref> Both companies, however, decided in July 2002 to combine these languages into a new language, BPEL4WS.<ref name="BPELHist" />

	In April 2003, BEA Systems, IBM, Microsoft, SAP, and Siebel Systems submitted BPEL4WS 1.1 to OASIS for standardization via the Web Services BPEL Technical Committee.<ref name="OASISBPEL">{{cite web \|url=http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|archiveurl=https://web.archive.org/web/20080724032537/http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|title=OASIS to get BPEL4WS jurisdiction \|author=Krill, Paul \|work=InfoWorld \|publisher=IDG Network \|date=15 April 2003 \|archivedate=24 July 2008 \|accessdate=19 August 2014}}</ref> Although "BPEL4WS" appeared as both a 1.0 and 1.1 version, the OASIS WS-BPEL technical committee voted on September 14, 2004 to name their spec "WS-BPEL 2.0."<ref name="ChorHist">{{cite web \|url=http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|archiveurl=https://web.archive.org/web/20070721002815/http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|title=WS BPEL issues list \|publisher=Choreology Ltd \|date=28 August 2006 \|archivedate=21 July 2007 \|accessdate=19 ~~august~~ 2014}}</ref>		In April 2003, BEA Systems, IBM, Microsoft, SAP, and Siebel Systems submitted BPEL4WS 1.1 to OASIS for standardization via the Web Services BPEL Technical Committee.<ref name="OASISBPEL">{{cite web \|url=http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|archiveurl=https://web.archive.org/web/20080724032537/http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|title=OASIS to get BPEL4WS jurisdiction \|author=Krill, Paul \|work=InfoWorld \|publisher=IDG Network \|date=15 April 2003 \|archivedate=24 July 2008 \|accessdate=19 August 2014}}</ref> Although "BPEL4WS" appeared as both a 1.0 and 1.1 version, the OASIS WS-BPEL technical committee voted on September 14, 2004 to name their spec "WS-BPEL 2.0."<ref name="ChorHist">{{cite web \|url=http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|archiveurl=https://web.archive.org/web/20070721002815/http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|title=WS BPEL issues list \|publisher=Choreology Ltd \|date=28 August 2006 \|archivedate=21 July 2007 \|accessdate=19 August 2014}}</ref> On April 12, 2007, version 2.0 of the standard was approved by OASIS.<ref name="OASIS2.0">{{cite web \|url=http://xml.coverpages.org/WS-BPELv20-Standard.html \|title=Members Approve Web Services Business Process Execution Language (WS-BPEL) as OASIS Standard \|work=Cover Pages \|author=Cover, Robin \|date=12 April 2007 \|accessdate=19 August 2014}}</ref> Public adoption of the new 2.0 standard was mixed, however, with some criticizing the "considerable differences to its previous 1.1 version."<ref name="McKendrickBPEL">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/bpel-bopped-for-the-umpteenth-time/717 \|title=BPEL bopped, for the umpteenth time \|author=McKendrick, Joe \|work=ZDNet \|publisher=CBS Interactive \|date=29 September 2006 \|accessdate=19 August 2014}}</ref>

	In June 2007, Active Endpoints, Adobe Systems, BEA, IBM, Oracle, and SAP published the BPEL4People ~~and WS-HumanTask specifications~~, which ~~describe how~~ human interaction in BPEL ~~processes can be implemented~~.		In June 2007, Active Endpoints, Adobe Systems, BEA, IBM, Oracle, and SAP published the BPEL4People specification, which introduces an extension to BPEL for implementing human interaction into processes.<ref name="4People">{{cite web \|url=http://xml.coverpages.org/BPEL4People-V1-200706.pdf \|format=PDF \|title=WS-BPEL Extension for People (BPEL4People), Version 1.0 \|author=Agrawal, Ashish; et al \|publisher=Cover Pages \|date=June 2007 \|accessdate=19 August 2014}}</ref> In February 2008, OASIS created a technical committee to further examine this specification.<ref name="McKendrickBPEL4People">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/bpel4people-advances-toward-the-mainstream/1061 \|title=BPEL4People advances toward the mainstream \|author=McKendrick, Joe \|work=ZDNet \|publisher=CBS Interactive \|date=20 February 2008 \|accessdate=19 August 2014}}</ref> A revised version 1.1 arrived on August 17, 2010.<ref name="BPEL4People1.1">{{cite web \|url=http://docs.oasis-open.org/bpel4people/bpel4people-1.1.html \|title=WS-BPEL Extension for People (BPEL4People) Specification Version 1.1 \|author=OASIS BPEL4People TC \|publisher=OASIS \|date=17 August 2010 \|accessdate=19 August 2014}}</ref>

	==External links==		==External links==
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	* [http://xml.coverpages.org/bpel4ws.html WS-BPEL at Cover Pages]		* [http://xml.coverpages.org/bpel4ws.html WS-BPEL at Cover Pages]
	* [http://xml.coverpages.org/bpel4people.html WS-BPEL Extension for People at Cover Pages]		* [http://xml.coverpages.org/bpel4people.html WS-BPEL Extension for People at Cover Pages]

			==Notes==
			An element or two of this article is reused from [http://en.wikipedia.org/wiki/Web_Services_Flow_Language the Wikipedia article].

	==References==		==References==
	<references />		<references />

Shawndouglas: Added content. Saving and adding more.

2014-08-19T20:22:55Z

Added content. Saving and adding more.

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	'''Web Services Business Process Execution Language''' ('''WS-BPEL''', sometimes referred to as '''Business Process Execution Language''' or '''BPEL''') is an XML-based language used in the specification of executable and abstract business processes. WS-BPEL enables "users to describe business process activities as Web services and define how they can be connected to accomplish specific tasks."<ref name="CP_BPEL4WS">{{cite web \|url=http://xml.coverpages.org/bpel4ws.html \|title=Business Process Execution Language for Web Services (BPEL4WS) \|author=Cover, Robin \|work=Cover Pages \|date=01 July 2008 \|accessdate=19 August 2014}}</ref>		'''Web Services Business Process Execution Language''' ('''WS-BPEL''', sometimes referred to as '''Business Process Execution Language''' or '''BPEL''') is an XML-based language used in the specification of executable and abstract business processes.<ref name="ManascoBPEL">{{cite web \|url=http://www.zdnet.com/blog/service-oriented/new-view-of-bpel/124 \|title=New view of BPEL \|author=Manasco, Britton \|publisher=ZDNet \|date=11 January 2005 \|accessdate=19 August 2014}}</ref> WS-BPEL enables "users to describe business process activities as Web services and define how they can be connected to accomplish specific tasks."<ref name="CP_BPEL4WS">{{cite web \|url=http://xml.coverpages.org/bpel4ws.html \|title=Business Process Execution Language for Web Services (BPEL4WS) \|author=Cover, Robin \|work=Cover Pages \|date=01 July 2008 \|accessdate=19 August 2014}}</ref>

	BPEL is an orchestration language and not a choreography language. Orchestration languages specify an executable process that involves message exchanges with other systems, such that the message exchange sequences are controlled by the orchestration designer. A choreography language specifies a protocol for peer-to-peer interactions, defining for example the legal sequences of messages exchanged with the purpose of guaranteeing interoperability. Such a protocol is not directly executable; it simply allows many different processes to comply with it. Choreography can be realized by writing an orchestration for each peer involved in it.<ref name="ReynoldsOC">{{cite web \|url=https://weblogs.java.net/blog/johnreynolds/archive/2006/01/service_orchest.html \|title=Service Orchestration vs. Service Choreography \|author=Reynolds, John \|work=Java.net \|publisher=Oracle \|date=19 January 2006 \|accessdate=19 August 2014}}</ref><ref name="DijkmanServ">{{cite journal \|url=http://eprints.qut.edu.au/622/ \|journal=International Journal of Cooperative Information Systems \|title=Service-oriented Design: A Multi-viewpoint Approach \|author=Dijkman, Remco; Dumas, Marlon \|volume=13 \|issue=4 \|year=2004 \|pages=337–378 \|doi=10.1142/S0218843004001012 \|accessdate=19 August 2014}}</ref>		BPEL is an orchestration language and not a choreography language. Orchestration languages specify an executable process that involves message exchanges with other systems, such that the message exchange sequences are controlled by the orchestration designer. A choreography language specifies a protocol for peer-to-peer interactions, defining for example the legal sequences of messages exchanged with the purpose of guaranteeing interoperability. Such a protocol is not directly executable; it simply allows many different processes to comply with it. Choreography can be realized by writing an orchestration for each peer involved in it.<ref name="ReynoldsOC">{{cite web \|url=https://weblogs.java.net/blog/johnreynolds/archive/2006/01/service_orchest.html \|title=Service Orchestration vs. Service Choreography \|author=Reynolds, John \|work=Java.net \|publisher=Oracle \|date=19 January 2006 \|accessdate=19 August 2014}}</ref><ref name="DijkmanServ">{{cite journal \|url=http://eprints.qut.edu.au/622/ \|journal=International Journal of Cooperative Information Systems \|title=Service-oriented Design: A Multi-viewpoint Approach \|author=Dijkman, Remco; Dumas, Marlon \|volume=13 \|issue=4 \|year=2004 \|pages=337–378 \|doi=10.1142/S0218843004001012 \|accessdate=19 August 2014}}</ref>
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	* a scoping system to allow the encapsulation of logic with local variables, fault-handlers, compensation-handlers, and event-handlers; and		* a scoping system to allow the encapsulation of logic with local variables, fault-handlers, compensation-handlers, and event-handlers; and
	* serialized scopes to control concurrent access to variables.		* serialized scopes to control concurrent access to variables.

			==History==
			By March 2001, IBM and Microsoft had each already defined their own, fairly similar "programming in the large" languages: WSFL (Web Services Flow Language) and XLANG, respectively.<ref name="WSFLNew">{{cite web \|url=http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|archiveurl=https://web.archive.org/web/20090306224354/http://www.infoworld.com/articles/hn/xml/01/05/03/010503hnworkflow.html \|title=WWW10: IBM readies Web services workflow proposal \|author=Lawson, Stephen \|work=InfoWorld \|publisher=IDG Network \|date=03 May 2001 \|archivedate=06 March 2009 \|accessdate=19 August 2014}}</ref><ref name="XLANGNew">{{cite web \|url=http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|archiveurl=https://web.archive.org/web/20010421152412/http://www.entmag.com/displayarticle.asp?ID=11220072307AM \|title=Talking in XLANG \|author=Anderson, Eric Binary \|work=ENT Online \|publisher=101 Communications \|date=22 November 2000 \|archivedate=21 April 2001 \|accessdate=19 August 2014}}</ref><ref name="BPELHist">{{cite web \|url=https://www.oasis-open.org/committees/download.php/23068/WS-BPEL%20Technical%20Overview%20for%20Developers%20and%20Architects%20-%20Part%201%20%28Frank%20Ryan%29.pdf \|format=PDF \|title=WS-BPEL 2.0 \|author=Ryan, Frank \|publisher=OASIS \|date=2007 \|accessdate=19 August 2014}}</ref> Both companies, however, decided in July 2002 to combine these languages into a new language, BPEL4WS, submitting .<ref name="BPELHist" />

			In April 2003, BEA Systems, IBM, Microsoft, SAP, and Siebel Systems submitted BPEL4WS 1.1 to OASIS for standardization via the Web Services BPEL Technical Committee.<ref name="OASISBPEL">{{cite web \|url=http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|archiveurl=https://web.archive.org/web/20080724032537/http://www.infoworld.com/article/03/04/15/HNbpel_1.html \|title=OASIS to get BPEL4WS jurisdiction \|author=Krill, Paul \|work=InfoWorld \|publisher=IDG Network \|date=15 April 2003 \|archivedate=24 July 2008 \|accessdate=19 August 2014}}</ref> Although "BPEL4WS" appeared as both a 1.0 and 1.1 version, the OASIS WS-BPEL technical committee voted on September 14, 2004 to name their spec "WS-BPEL 2.0."<ref name="ChorHist">{{cite web \|url=http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|archiveurl=https://web.archive.org/web/20070721002815/http://www.choreology.com/external/WS_BPEL_issues_list.html#Issue98 \|title=WS BPEL issues list \|publisher=Choreology Ltd \|date=28 August 2006 \|archivedate=21 July 2007 \|accessdate=19 august 2014}}</ref>

			In June 2007, Active Endpoints, Adobe Systems, BEA, IBM, Oracle, and SAP published the BPEL4People and WS-HumanTask specifications, which describe how human interaction in BPEL processes can be implemented.

	==External links==		==External links==

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'''Web Services Business Process Execution Language''' ('''WS-BPEL''', sometimes referred to as '''Business Process Execution Language''' or '''BPEL''') is an XML-based language used in the specification of executable and abstract business processes. WS-BPEL enables "users to describe business process activities as Web services and define how they can be connected to accomplish specific tasks."<ref name="CP_BPEL4WS">{{cite web |url=http://xml.coverpages.org/bpel4ws.html |title=Business Process Execution Language for Web Services (BPEL4WS) |author=Cover, Robin |work=Cover Pages |date=01 July 2008 |accessdate=19 August 2014}}</ref>

BPEL is an orchestration language and not a choreography language. Orchestration languages specify an executable process that involves message exchanges with other systems, such that the message exchange sequences are controlled by the orchestration designer. A choreography language specifies a protocol for peer-to-peer interactions, defining for example the legal sequences of messages exchanged with the purpose of guaranteeing interoperability. Such a protocol is not directly executable; it simply allows many different processes to comply with it. Choreography can be realized by writing an orchestration for each peer involved in it.<ref name="ReynoldsOC">{{cite web |url=https://weblogs.java.net/blog/johnreynolds/archive/2006/01/service_orchest.html |title=Service Orchestration vs. Service Choreography |author=Reynolds, John |work=Java.net |publisher=Oracle |date=19 January 2006 |accessdate=19 August 2014}}</ref><ref name="DijkmanServ">{{cite journal |url=http://eprints.qut.edu.au/622/ |journal=International Journal of Cooperative Information Systems |title=Service-oriented Design: A Multi-viewpoint Approach |author=Dijkman, Remco; Dumas, Marlon |volume=13 |issue=4 |year=2004 |pages=337–378 |doi=10.1142/S0218843004001012 |accessdate=19 August 2014}}</ref>

In addition to providing facilities to enable sending and receiving messages, the BPEL programming language was initially created to also support and/or provide<ref name="WebberWS">{{cite journal |url=http://www.sys-con.com/webservices/article.cfm?id=622 |archiveurl=https://web.archive.org/web/20030829222907/http://www.sys-con.com/webservices/article.cfm?id=622 |journal=Web Services Journal |title=Introducing BPEL4WS 1.0 |author=Webber, Jim; Little, Mark |publisher=SYS-CON Publications |volume=3 |issue=8 |date=August 2003 |archivedate=29 August 2003 |accessdate=19 August 2014}}</ref>:

* a property-based message correlation mechanism;
* XML and WSDL typed variables;
* an extensible language plug-in model to allow writing expressions and queries in multiple languages;
* structured-programming constructs, including if-then-else, if-else, while, sequence, and flow;
* a scoping system to allow the encapsulation of logic with local variables, fault-handlers, compensation-handlers, and event-handlers; and
* serialized scopes to control concurrent access to variables.

==External links==
Note: Some of the links at ''Cover Pages'' may need to be run through the Internet Archive's [https://archive.org/ Wayback Machine].

* [https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=wsbpel WS-BPEL at OASIS]
* [http://xml.coverpages.org/bpel4ws.html WS-BPEL at Cover Pages]
* [http://xml.coverpages.org/bpel4people.html WS-BPEL Extension for People at Cover Pages]

==References==
<references />