WSE 2011 Special Theme is Access for All. Since WSE 2001 in Florence, over the last decade there have been numerous advances related to the accessibility of Web applications for the disabled, including multilingual Web sites, beyond-desktop (non-PC) devices for Web content, and new navigation paradigms and technologies. These advances have profound implications for the systematic evolution of modern Web applications. Starting from this special theme, WSE topics of interest include, but are not restricted to, the following aspects of Web systems design, development, maintenance and evolution:

* Accessibility of Web systems
* Mobile Web systems
* Model-driven reengineering and re-design of Web systems
* Requirements Evolution for Web Systems
* Migration towards Web 2.0, SOA, and the Cloud
* Web systems with self-adaptive and autonomic features
* Novel Web paradigms and their impact
* Traceability of Web systems
* Reverse engineering and analysis of Web systems
* Security and privacy in Web systems
* Evaluation, testing and quality assessment of Web systems
* Multilingual Web systems
* Semantic Web
* Empirical studies of Web systems