Large scale automatic web accessibility validation of Italian public administration web sites

To support large-scale validation, we have extended the MAUVE++ tool . When we started this study, it was a tool aiming at identifying accessibility errors on websites in order to facilitate their correction; and for this reason, it focused on presenting results in terms of violated techniques (which is the most detailed level), and it was able to validate only small groups of pages associated with a Web site. For such reasons, we had to face three different challenges to perform a large-scale validation: 1) to report the validation results in a more abstract manner and higher level granularity to facilitate their interpretation from a monitoring perspective, 2) to update the crawling and the validation process to be able to scale-up to large numbers of pages and sites, 3) and to support validation of Web sites implemented with modern technologies.