This, the 13th issue of Transactions on Large-Scale Data and Knowledge-Centered Systems, contains six revised selected regular papers. Topics covered include federated data sources, information filtering, web data clouding, query reformulation, package skyline queries and SPARQL query processing over a LaV (Local-as-View) integration system. | Transactions on Large-Scale Data- and Knowledge-Centered Systems XIII by Abdelkader Hameurlain, Paperback | Indigo Chapters