The OAI Object Reuse & Exchange Project JISC CETIS Metadata & Digital Repositories SIG meeting, London

The OAI Object Reuse & Exchange Project The ORE project The ORE alpha specs Abstract Data Model Current/upcoming events & activities Title slide photo of mosaic from Palau de la Musica Catalana, Barcelona by Flickr user docman See http://www.flickr.com/photos/docman/364629766/ Made available under Creative Commons Attribution-NonCommercial License http://www.openarchives.org/ore/

The ORE project

The ORE alpha specs

Abstract Data Model

Current/upcoming events & activities

The ORE Project

The ORE Project Project under umbrella of Open Archives Initiative October 2006/September 2008 Supported by Andrew W. Mellon Foundation, with additional support from National Science Foundation & Microsoft International participation Coordinators: Carl Lagoze (Cornell) & Herbert Van de Sompel (LANL Research Lib) Advisory Committee (16): strategic guidance Technical Committee (14): the work!  “ Editorial SubGroup” (6) Liaison Group (9): linkage with similar activities

Project under umbrella of Open Archives Initiative

October 2006/September 2008

Supported by Andrew W. Mellon Foundation, with additional support from National Science Foundation & Microsoft

International participation

Coordinators: Carl Lagoze (Cornell) & Herbert Van de Sompel (LANL Research Lib)

Advisory Committee (16): strategic guidance

Technical Committee (14): the work! 

“ Editorial SubGroup” (6)

Liaison Group (9): linkage with similar activities

The ORE Project “ ORE will develop specifications that allow distributed repositories to exchange information about their constituent digital objects” “ Digital objects” as compound, composite (etc) e.g. multi-page doc, image set, set of doc + data, reading list etc Identified bounded aggregations of related information units that form a logical whole How does provider encode/disclose descriptions of aggregations? How does consumer discover/interpret descriptions of aggregations? Set of alpha specifications released Dec 2007

“ ORE will develop specifications that allow distributed repositories to exchange information about their constituent digital objects”

“ Digital objects” as compound, composite (etc)

e.g. multi-page doc, image set, set of doc + data, reading list etc

Identified bounded aggregations of related information units that form a logical whole

How does provider encode/disclose descriptions of aggregations?

How does consumer discover/interpret descriptions of aggregations?

Set of alpha specifications released Dec 2007

The ORE alpha specs

ORE alpha Specifications Based on work of ORE Technical Committee Authored by “editorial subgroup” Public alpha release December 2007 Comments to oai-ore Google Group Six documents Abstract Data Model (and Overview) Resource Map Profile of Atom (and Overview) Vocabulary Resource Map Discovery Generally, aim at lightweight, widely-applicable approach specify minimum necessary that is useful

Based on work of ORE Technical Committee

Authored by “editorial subgroup”

Public alpha release December 2007

Comments to oai-ore Google Group

Six documents

Abstract Data Model (and Overview)

Resource Map Profile of Atom (and Overview)

Vocabulary

Resource Map Discovery

Generally, aim at lightweight, widely-applicable approach

specify minimum necessary that is useful

ORE Abstract Data Model Builds on principles of Architecture of World Wide Web Resource Description Framework (RDF) Named Graphs Web Arch Resource-oriented view of problem space Use of URIs as globally-scoped resource identifiers Uniform interface Exchange of information about resource state (representations) Hypermedia: representations provide more URIs RDF Description of typed relationships between resources using RDF triples Graph as set of triples Named Graph RDF graph is resource which can be named (by URI) See also: Linked Data

Builds on principles of

Architecture of World Wide Web

Resource Description Framework (RDF)

Named Graphs

Web Arch

Resource-oriented view of problem space

Use of URIs as globally-scoped resource identifiers

Uniform interface

Exchange of information about resource state (representations)

Hypermedia: representations provide more URIs

RDF

Description of typed relationships between resources using RDF triples

Graph as set of triples

Named Graph

RDF graph is resource which can be named (by URI)

See also: Linked Data

Aggregation Aggregated Resource is-gathered-into m n Resource Map is-described-by 1 1 The “core” ORE model

ORE Resource Map Named RDF Graph Must express Relationship between Resource Map and Aggregation Relationships between Aggregation and Aggregated Resources Basic metadata about Resource Map May express Additional metadata about Resource Map Metadata about Aggregation, relationships w other resources Metadata about Aggregated Resources, relationships w other resources Small RDF vocabulary defined by ORE “ Aggregation Graph” as formally defined subgraph of Resource Map

Named RDF Graph

Must express

Relationship between Resource Map and Aggregation

Relationships between Aggregation and Aggregated Resources

Basic metadata about Resource Map

May express

Additional metadata about Resource Map

Metadata about Aggregation, relationships w other resources

Metadata about Aggregated Resources, relationships w other resources

Small RDF vocabulary defined by ORE

“ Aggregation Graph” as formally defined subgraph of Resource Map

AR-1 AR-2 A-1 ReM-1 ore:describes ore:aggregates ore:aggregates Agent-A “ yy-mm-dd” dc:creator dcterms:modified Minimal ORE Resource Map Aggregation Graph

Other ORE documents Resource Map Profile of Atom Profile of Atom Syndication Format Supports subset of Resource Map features GRDDL-able i.e. mapping to RDF/XML via XSLT Currently only serialisation format specified by alpha specs beta specs will (probably!) include guidelines for RDF syntaxes Resource Map Discovery Conventions for disclosure of Resource Maps OAI-PMH, sitemaps etc Links from representations of Aggregated Resources to Resource Map etc

Resource Map Profile of Atom

Profile of Atom Syndication Format

Supports subset of Resource Map features

GRDDL-able i.e. mapping to RDF/XML via XSLT

Currently only serialisation format specified by alpha specs

beta specs will (probably!) include guidelines for RDF syntaxes

Resource Map Discovery

Conventions for disclosure of Resource Maps

OAI-PMH, sitemaps etc

Links from representations of Aggregated Resources to Resource Map etc

Current/upcoming events & activities

Current/upcoming events/activities ORE TC currently preparing next versions of specs USA Open meeting 3 March, John Hopkins University, Baltimore, MD European Open meeting 4 April, Univ of Southampton (post-OR2008) Implementation/experimentation projects Mellon Foundation Michael Nelson, Old Dominion University Tim Cole, Univ of Illinois at Urbana-Champaign JISC tbc! Others e.g. ORE Chem ORE TC response to comments Version 1 specs by September 2008

ORE TC currently preparing next versions of specs

USA Open meeting

3 March, John Hopkins University, Baltimore, MD

European Open meeting

4 April, Univ of Southampton (post-OR2008)

Implementation/experimentation projects

Mellon Foundation

Michael Nelson, Old Dominion University

Tim Cole, Univ of Illinois at Urbana-Champaign

JISC

tbc!

Others e.g. ORE Chem

ORE TC response to comments

Version 1 specs by September 2008

ORE in short A Webby approach to “compound objects”, simple part-whole relationships… … built on a resource-oriented perspective Simple but extensible Relationship with e.g. IMS CP, METS, DIDL? Seed of a more resource-oriented approach to “repository”? http://www.openarchives.org/ore/

A Webby approach to “compound objects”, simple part-whole relationships…

… built on a resource-oriented perspective

Simple but extensible

Relationship with e.g. IMS CP, METS, DIDL?

Seed of a more resource-oriented approach to “repository”?

The OAI Object Reuse & Exchange Project JISC CETIS Metadata & Digital Repositories SIG meeting, London