The use of RDF data published on the Web for applications is still a cumbersome and resource-intensive task due to the limited software support and the lack of standard programming paradigms to deal with everyday problems such as combination of RDF data from different sources, object identifier consolidation, ontology alignment and mediation, or plain querying and filtering tasks. In this paper we present Semantic Web Pipes that support fast implementation of Semantic data mash-ups while preserving desirable properties abstraction, encapsulation, component-orientation, code re-usability and maintainability which are common and well supported in other application areas. Categories and Subject Descriptors: