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

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

Martin Endig, Gunter Saake, Eike Schallehn - Federation Services for Heterogeneous Document Sources

Fed

erated D

atabases...

WrapperLocal ExternalSchema

ExportSchema 1

ComponentSchema 1

ConceptualSchema 1

InternalSchema 1

DB1

ComponentSystemDBS 1

ComponentSystem n

Federation ServiceGlobal (Federated)Schema

ExportSchema n

ComponentSchema n

ConceptualSchema n

StructureDescription n

Global Application 1

...Global ExternalSchema 1

Global ExternalSchema m

Global Application m

Martin Endig, Gunter Saake, Eike Schallehn - Federation Services for Heterogeneous Document Sources

Federation Service

Adapter Generation

Working Packages

DB1

Federation Service

DB2 DBn...

AdapterAdapterAdapterAdapter

Higher Level Services

Common Interface / Unified Representation

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