1. Martin Endig, Gunter Saake, Eike Schallehn - Federation Services for Heterogeneous Document Sources Federation Services for Heterogeneous Document Sources Global Info-Project Magdeburg Project Cooperation: Infrastructure

2. Martin Endig, Gunter Saake, Eike Schallehn - Federation Services for Heterogeneous Document Sources Current Situation Various providers of digital libraries and electronic catlogues –Publishers, public libraries, catalogues for specific research or geographic areas Differences regarding –Data management (DB, semi-/structured files,...) –Interfaces and standard support (Z39.50, MARC, MAB, RDF/DC,...) –Contents (e.g. publisher vs. library) Goal: access via one integrated interface

3. Martin Endig, Gunter Saake, Eike Schallehn - Federation Services for Heterogeneous Document Sources Federated Databases... Wrapper Local External Schema Export Schema 1 Component Schema 1 Conceptual Schema 1 Internal Schema 1 DB1 Component System DBS 1 Component System n Federation Service Global (Federated) Schema Export Schema n Component Schema n Conceptual Schema n Structure Description n Global Application 1... Global External Schema 1 Global External Schema m Global Application m

4. Martin Endig, Gunter Saake, Eike Schallehn - Federation Services for Heterogeneous Document Sources Federation Service Adapter Generation Working Packages DB1 Federation Service DB2DBn... Adapter Higher Level Services Common Interface / Unified Representation

5. Martin Endig, Gunter Saake, Eike Schallehn - Federation Services for Heterogeneous Document Sources What we do and what we don‘t do... DO –Providing homogeneous access to structured data about scientific publications from different sources DON‘T –Information retrieval –Global consistency / transactions Currently: –Investigating state of the art for FDBMs, DLs... –Creating test environment –Investigating existing solutions/test suites/tools