3TU Datacentrum Back-end

An overview of current status as to the technical infrastructure.

Etienne Posthumus TU Delft Library

14-04-2009

Overview

• Fedora Repository Software

• Python middleware

• Fedora Front-end

• Dataset types

• Current Datasets

Fedora Repository Software

Investigation of use in past year

Institutional repository implemented

Not perfect, but most flexible of comparable systems.

The DIY downside is paradoxically also a key benefit.

Python middleware

• Django Application framework

• Agile software development

• Fedora coupling via REST HTTP API

• Also use SOLR for indexing

• Fall-through to Fedora provided services always possible

Fedora Front-end

• XSLT based

• Dynamic queries based on Resource Index

• Multiple output formats possible

• Used CMA for behaviours

Ellips: Fedora objectPijl: relatie (rdf)Kleine rechthoek: tekstuele metadataGrote rechthoek: datastream (anders dan DC of RELS-EXT)

Diagram by E Gramsbergen

Fedora Front-end

• XSLT based

• Dynamic queries based on Resource Index

• Multiple output formats possible

• Used CMA for behaviours

demo link en link

Dataset types

We identify two different types

• archival ingested submissions

• enriched objects

Dataset types

Archival Submissions

• Recorded, checksum as-is

• For reference purposes

Dataset types

Archival Submissions

• Recorded, checksum as-is

• For reference purposes

• Considering Bagit(from Library of Congress)

• Or accepting the Fedora FOXML format

Dataset types

Enriched objects

Possible conversions to other formats

For example CSV to XML

Manageable chunks

Dataset types

Enriched objects

Possible conversions to other formats

For example CSV to XML

Manageable chunks

Selected metadata as RDF

Stored in Resource Index

Current Datasets

• DARELUX

• WindZon

• Flame

• Asfalt

• Water

Discussion/Questions