“…This special issue is an outcome of the 12th IEEE International Symposium on Web Systems Evolution (WSE 2010) that was held on September 17–18, 2010 in Timişoara, Romania, and co‐located with the 26th International Conference on Software Maintenance. WSE has had associated special issues for several years now, which have been published at the following journals: Wiley's Journal of Software Maintenance and Evolution (JSME) for WSE 2002 and WSE 2006 , Rinton's Journal of Web Engineering (JWE) for WSE 2007 , and Springer's Software Tools for Technology Transfer (STTT) for WSE 2008 and WSE 2009 .…”