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Information flow control on the Internet is a desirable feature when it comes to content such as neo-Nazi propaganda, child pornography, or material showing extreme violence or crimes. In order to provide for a flexible control of information flow on the Internet, we present the pattern system InFO (short for: Information Flow Ontology). InFO provides a common support for different enforcing systems such as routers, proxies, or name servers by abstracting from existing as well as possible future regulation types. Thus, unlike existing solutions, InFO provides information flow control on the Internet-layer, transport-layer, as well as application-layer. In addition, InFO allows for linking the technical implementation of a flow control policy with a human-readable representation including its legal background (law) and organizational motivation (code of conduct). Besides a detailed description of the pattern system, we also provide various examples demonstrating the practical applicability of InFO. InFO has been implemented for name servers, routers, as well as application-level proxy servers. Its source code is available to the public.

While Digital Libraries (DLs) are moving towards universally accessible collections of human knowledge, considerable advances are needed in DL methodologies and technologies to make this happen. Interoperability between DLs is a crucial requirement to achieve this goal. The European project, DL.org, is focused on advancing the state of the art in this area by proposing solutions, fostering best practices and shared standards, drawing on the knowledge acquired during the DELOS Network of Excellence, and harnessing the expertise of DL domain stakeholder communities. By serving this goal, DL.org is paving the way for the embedding of new research achievements into real-world systems, opening up new cross-domain research perspectives and supporting the advancement of the European Information Space for the knowledge-based economy.