@conference {jopera:2005:vlhcc,
	title = {JOpera: an Agile Environment for Web Service Composition with Visual Unit Testing and Refactoring},
	booktitle = {2005 IEEE Symposium on Visual Languages and Human Centric Computing (VL/HCC{\textquoteright}05)},
	year = {2005},
	month = {September},
	pages = {311 - 313},
	publisher = {IEEE},
	organization = {IEEE},
	address = {Dallas, TX},
	abstract = {Agile methodologies employ light-weight development practices emphasizing a test-driven approach to the development of software systems. Modern agile development environments support this approach by providing tools that automate most of the work required to effectively deal with change, including unit testing and different forms of refactoring. In this paper we discuss how to apply such techniques within the JOpera Visual Composition Language. More precisely, we show how we used the visual language to implement a regression testing framework for compositions written in the language itself and how we introduced support in the visual environment for refactorings such as renaming, synchronization of service interface changes, and extraction/inlining across different levels of nesting. This is done in the context of the Web service composition tools provided with the JOpera for Eclipse research platform.},
	keywords = {agile, JOpera, refactoring, visual composition languages},
	doi = {10.1109/VLHCC.2005.48},
	author = {Cesare Pautasso}
}
@article {106,
	title = {The JOpera visual composition language},
	journal = {J. Vis. Lang. Comput.},
	volume = {16},
	year = {2005},
	month = {February},
	pages = {119{\textendash}152},
	abstract = {Composing Web services into a coherent application can be a tedious and error-prone task when using traditional textual scripting languages or emerging XML-based approaches. As an alternative, complex interactions patterns and data exchanges between different Web services can be effectively modeled using a visual language. In this paper, we discuss the requirements of such an application scenario and we fully describe the JOpera Visual Composition Language. An extensive set of visual editing tools, a compiler and a debugger for the language have been implemented as part of the JOpera system with the goal of providing a true visual environment for Web service composition with usability features emphasizing rapid development and visual scalability. },
	keywords = {data flow, JOpera, visual composition languages, Web service composition, Web services},
	issn = {1045-926X},
	doi = {10.1016/j.jvlc.2004.08.004},
	author = {Cesare Pautasso and Gustavo Alonso}
}
