1. XLANG
BPEL4WS
Kathrin Prantner
kathrin.prantner@deri.at

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XLANGXLANG

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What is XLANG
 Exchange Language – Web Service for
Business Process Design
 Microsoft – runnable on all platforms
 Written format is XML
 Biz Talk Application Designer

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Motivation
 Enabling technology
 New standards and descriptions around existing
technologies => develope language which is able to
handle
 Business imperative
 To ease the automation of business processes
 To describe a standard for reuse by other tools

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Relationship with WSDL
 Grounding of a XLANG service description is
defined by using WSDL
 XLANG describes the behavior as part of a
business process
 Actions in XLANG = operations of WSDL

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Business Process (I)
 Contract between two ore more parties
 XLANG service description describes the
behavior
 It is used a map – describes the
connections between the ports
 Each port is added to the map

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Business Process (II)

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Correlation
 Correlation tokens
 For automated instance routing
 Messages to the correct port and instance
 Instance: interaction with which the behavior of the
service is represented
 Calculated lifetime
 Correlation set
 Correlation group