Communications of the ACM
The reflexive CHAM and the join-calculus
POPL '96 Proceedings of the 23rd ACM SIGPLAN-SIGACT symposium on Principles of programming languages
XL: an XML programming language for web service specification and composition
Proceedings of the 11th international conference on World Wide Web
CRPIT '02 Proceedings of the seventh Asia-Pacific conference on Computer systems architecture
XL: a platform for web services
Proceedings of the 2002 ACM SIGMOD international conference on Management of data
Dynamic and adaptive composition of e-services
Information Systems - The 12th international conference on advanced information systems engineering (CAiSE 00)
The Self-Serv Environment for Web Services Composition
IEEE Internet Computing
Modern Concurrency Abstractions for C#
ECOOP '02 Proceedings of the 16th European Conference on Object-Oriented Programming
Component technology: what, where, and how?
Proceedings of the 25th International Conference on Software Engineering
Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions
Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions
Programming and compiling web services in GPSL
ICSOC'05 Proceedings of the Third international conference on Service-Oriented Computing
GPSL: a programming language for service implementation
FASE'06 Proceedings of the 9th international conference on Fundamental Approaches to Software Engineering
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There is now widespread acceptance of Web services and service-oriented architectures. But despite the agreement on key Web services standards there remain many challenges. Programming environments based on WSDL support go some way to facilitating Web service development. However Web services fundamentally rely on XML and Schema, not on contemporary programming language type systems such as those of Java or .NET. Moreover, Web services are based on a messaging paradigm and hence bring forward the traditional problems of messaging systems including concurrency control and message correlation. It is easy to write simple synchronous Web services using traditional programming languages; however more realistic scenarios are surprisingly difficult to implement. To alleviate these issues we propose a programming language which directly supports Web service development. The language leverages XQuery for native XML processing, supports implicit message correlation and has high level join calculus-style concurrency control. We illustrate the features of the language through a motivating example.