Operational semantics
At any point in time, a subset of the embedded Activities is enabled. Initially, all Activities without incoming Sequence Flows are enabled. One of the enabled Activities is selected for execution. This is not done by the implementation but usually by a Human Performer. If the ordering attribute is set to sequential, another enabled Activity can be selected for execution only if the previous one has terminated. If the ordering attribute is set to parallel, another enabled Activity can be selected for execution at any time. This implies the possibility of the multiple parallel instances of the same inner Activity.
After each completion of an inner Activity, a condition specified through the completionCondition attribute is evaluated:
If false, the set of enabled inner Activities is updated and new Activities can be selected for execution.
If true, the Ad-Hoc Sub-Process completes without executing further inner Activities. In case the ordering attribute is set to parallel and the attribute cancelRemainingInstances is true, running instances of inner
Activities are canceled. If cancelRemainingInstances is set to false, the Ad-Hoc Sub-Process completes after all remaining inner instances have completed or terminated.
- 2.2Process Modeling Conformance
- 2.2.1BPMN Process Types
- 2.2.2BPMN Process Elements
- Common Executable Conformance Sub-Class
- 2.2.3Visual Appearance
- 2.2.4Structural Conformance
- 2.3Process Execution Conformance
- 2.3.1Execution Semantics
- 2.3.2Import of Process Diagrams
- 2.4BPEL Process Execution Conformance
- 2.5Choreography Modeling Conformance
- 2.5.1BPMN Choreography Types
- 2.6Summary of BPMN Conformance Types
- 3 Normative References
- 3.1General
- 3.2Normative
- 3.3Non-Normative
- Activity Service
- BPEL4People
- Business Process Definition Metamodel
- Business Process Modeling
- Business Transaction Protocol
- XPDL
- 4 Terms and Definitions
- 5 Symbols
- 6 Additional Information
- 6.1Conventions
- 6.1.1Typographical and Linguistic Conventions and Style
- 6.1.2Abbreviations
- 6.2Structure of this Document
- 6.3Acknowledgments
- Submitting Organizations
- 7.2BPMN Scope
- Understanding the Behavior of Diagrams
- 7.3BPMN Elements
- 8.3.4External Relationships
- Context-based Correlation
- 8.4.7Flow Element
- 8.4.14 Common Package XML Schemas
- 8.5Services
- 9 Collaboration
- 9.1General
- 9.2Basic Collaboration Concepts
- 9.2.1Use of BPMN Common Elements
- ParticipantAssociation
- 9.6Process within Collaboration
- 9.7Choreography within Collaboration
- 10.2 Basic Process Concepts
- 10.2.1 Types of BPMN Processes
- 10.3.7 Global Task
- Complex Behavior Definition
- 10.3.9 XML Schema for Activities
- 10.4 Items and Data
- 10.4.1 Data Modeling
- Item-Aware Elements
- Data Inputs and Outputs
- Data Output
- Assignment
- Execution Semantics for DataAssociation
- 10.4.3 Usage of Data in XPath Expressions
- Access to BPMN Data Objects
- 10.4.4 XML Schema for Data
- 10.5 Events
- Implicit Throw Event
- 10.5.2 Start Event
- Activity Boundary Connections
- Interrupting Event Handlers (Error, Escalation, Message, Signal, Timer, Conditional, Multiple, and Parallel Multiple)
- Non-interrupting Event Handlers (Escalation, Message, Signal, Timer, Conditional, Multiple, and Parallel Multiple)
- Handling End Events
- 10.5.7 Scopes
- 10.6.7 Gateway Package XML Schemas
- 10.7 Compensation
- 10.7.3 Relationship between Error Handling and Compensation
- 10.8 Lanes
- 10.9 Process Instances, Unmodeled Activities, and Public Processes
- 11 Choreography
- 11.1 General
- 11.4.2 Artifacts
- 11.5 Choreography Activities
- 11.6.3 End Events
- 11.7 Gateways
- 11.7.1 Exclusive Gateway
- 12 BPMN Notation and Diagrams
- 12.1 BPMN Diagram Interchange (BPMN DI)
- 12.1.1 Scope
- 12.1.2 Diagram Definition and Interchange
- 12.1.3 How to Read this Clause
- 12.2 BPMN Diagram Interchange (DI) Meta-model
- 12.2.1 Overview
- 12.2.2 Abstract Syntax
- 12.2.4 Complete BPMN DI XML Schema
- 12.3 Notational Depiction Library and Abstract Element Resolutions
- 12.4.5 Choreography
- 13.2 Process Instantiation and Termination
- 13.3 Activities
- 13.3.3 Task
- 13.3.4 Sub-Process/Call Activity
- 13.3.5 Ad-Hoc Sub-Process
- Operational semantics
- 13.3.6 Loop Activity
- 13.3.7 Multiple Instances Activity
- 13.5 Events
- 13.5.1 Start Events
- 13.5.2 Intermediate Events
- 13.5.3 Intermediate Boundary Events
- 13.5.4 Event Sub-Processes
- Operational semantics
- 13.5.5 Compensation
- Compensation Handler
- 13.5.6 End Events
- Process level end events
- 14 Mapping BPMN Models to WS-BPEL
- 14.1 General
- 15 Exchange Formats
- 15.1 Interchanging Incomplete Models
- 15.2 Machine Readable Files
- 15.3.1 Document Structure
- 15.5 XSLT Transformation between XSD and XMI
- B.1 Scope
- B.2 Architecture
- B.4 Diagram Interchange
- B.4.1 Overview