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This, the 12th issue of Transactions on Large-Scale Data and Knowledge-Centered Systems, contains five revised selected regular papers. Topics covered include schema matching and schema mapping, update propagation in decision support systems, routing methods in peer-to-peer systems, distributed stream analytics and dynamic data partitioning.

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EvoMatch: An Evolutionary Algorithm for Inferring Schematic Correspondences.- Update Management in Decision Support Systems.- LRS: A Novel Learning Routing Scheme for Query Routing on Unstructured P2P Systems.- Open Streaming Operation Patterns.- Dynamic Workload-Based Partitioning Algorithms for Continuously Growing Databases.

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Roland Wagner, Kunsthistoriker und Germanist, ist Stipendiat der Fazit-Stiftung und Spezialist für den Einfluss der Philosophie Friedrich Nietzsches auf die Kunst.

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