efum 050928 lagoze

Fedora Content Models for the National Science Digital Library Data Repository: 

Fedora Content Models for the National Science Digital Library Data Repository Fedora User’s Group Meeting Copenhagen, September 28, 2005 Carl Lagoze Cornell Information Science

NSDL Context: 

NSDL Context

A bit of NSDL background: 

A bit of NSDL background Mission: “Improve Science, Math, Engineering education through digital libraries” Original NSDL solicitation in 1999 Over 180 projects funded Core integration (Columbia, Cornell, UCAR) charged with providing organizational, technical infrastructure CI (Cornell) funding through 2006 http://www.nsdl.org

Information in Context: 

…who used it …how was it used …how is it described & rated …how is it classified …how does it related to standards …how has it been aggregated …what has it been used with Information in Context

Information Network Overlay: 

Information Network Overlay

NSDL Data Repository (NDR): 

NSDL Data Repository (NDR) Fedora-based implementation of information network overlay Content model to represent NSDL information entities and relationships Extensive use of resource index and new oai service

Fedora NDR: 

Fedora NDR Objects: agents, metadata items, resources, services (metadata providers), aggregations Relationships: metadataFor, providedBy, memberOf, representedBy + ontology-specific Disseminations: metadata transformations OAI harvesting: both static and generated metadata formats Authentication/Authorization: Collections and services manage their own repository content, contribution of annotations, new content

Live Demo: 

Live Demo http://fedora.nsdlib.org:8380/repository/bigBang.htm

Metadata in the NDR: 

Metadata in the NDR Multiple formats static (ingested from provider) generated/crosswalked Multi-sourced de-dupped Retain branding of metadata OAI-PMH harvesting

Resources, Metadata, Metadata Providers: 

Resources, Metadata, Metadata Providers

Metadata Content Model: 

Metadata Content Model

proai – Fedora 2.1 OAI Service : 

proai – Fedora 2.1 OAI Service Old OAI service – harvest only system DC Support for arbitrary metadata formats static data streams and disseminator generated exploits queries to resource index proai.properties configuration

proai configuration: 

proai configuration

Collections and Aggregations: 

Collections and Aggregations Set basis Semantic basis Agent associated

Aggregation Model: 

Aggregation Model

Annotation/Reviews: 

Annotation/Reviews Unstructured metadata about a resource Exists as resource and annotation Separate agent provenance from annotated resource

Annotation Model: 

Annotation Model

The SDSC Archive: 

The SDSC Archive Uses Storage Resource Broker (SRB) Monthly snapshots of crawlable content Identifies resource as collection of related web pages Can’t access protected content, robots.txt blocked, etc. – no requirement for NSDL projects to participate REST interface for read access (but not submission – yet)

Integrating SDSC Archive into NDR: 

Integrating SDSC Archive into NDR