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The Linking Open Data (LOD) initiative has motivated numerous data providers to expose and interlink their data on the Web. But since different data providers often use different vocabularies for describing related resources, applications that consume data from the Web must first reconcile the structural and semantic heterogeneities among the data sets. As a possible solution for the representation, execution, and maintenance of mappings in the context of LOD, we propose a Web-based technique for establishing metadata interoperability. It allows for the declaration of mapping relationships...