The WSLA Framework: Specifying and Monitoring Service Level Agreements for Web Services
Journal of Network and Systems Management
On Design and Implementation of a Contract Monitoring Facility
WEC '04 Proceedings of the First IEEE International Workshop on Electronic Contracting
An EREC framework for e-contract modeling, enactment and monitoring
Data & Knowledge Engineering - Special issue: Contract-driven coordination and collaboration in the internet context
A framework for requirents monitoring of service based systems
Proceedings of the 2nd international conference on Service oriented computing
Preliminary design of JML: a behavioral interface specification language for java
ACM SIGSOFT Software Engineering Notes
Run-Time Monitoring of Instances and Classes of Web Service Compositions
ICWS '06 Proceedings of the IEEE International Conference on Web Services
Case studies for contract-based systems
Proceedings of the 7th international joint conference on Autonomous agents and multiagent systems: industrial track
Towards a Monitoring Framework for Agent-Based Contract Systems
CIA '08 Proceedings of the 12th international workshop on Cooperative Information Agents XII
Pro-active monitoring of electronic contracts
CAiSE'03 Proceedings of the 15th international conference on Advanced information systems engineering
A middleware architecture for building contract-aware agent-based services
SOCASE'08 Proceedings of the 2008 AAMAS international conference on Service-oriented computing: agents, semantics, and engineering
Towards dynamic monitoring of WS-BPEL processes
ICSOC'05 Proceedings of the Third international conference on Service-Oriented Computing
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Electronic contracting, based on explicit representation of different parties' commitments, is a promising way to specifying and regulating behaviour in distributed business applications. A key part of contract-based system is a process through which the actual behaviour of individual parties is checked for conformance with contracts set to govern such behaviour. Such checking requires that relevant information on the behaviour of the parties, both with respect to the application processes they execute and to managing their contractual relationships, is captured. The process of collecting all such information, termed contract observation , is the subject of this paper. First, we describe general properties and requirements of such an observation process; afterwards, we discuss specifics of realising contract observation in web services environments. Finally, we show how contract observation has been implemented as part of the IST-CONTRACT web services framework for contract-based systems.