ORE Specification and User Guide - Table of Contents

10 December 2007


This document was part of an alpha release and has been superseded.

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Editors (OAI Executive)
Carl Lagoze, Cornell University Information Science
Herbert Van de Sompel, Los Alamos National Laboratory
Editors (ORE Technical Committee)
Pete Johnston, Eduserv Foundation
Michael Nelson, Old Dominion University
Robert Sanderson, University of Liverpool
Simeon Warner, Cornell University Information Science


Open Archives Initiative Object Reuse and Exchange (OAI-ORE) defines standards for the description and exchange of aggregations of Web resources.  This document provides an introduction and lists the specifications and user guide documents that make up the OAI-ORE standards.

ORE User Guide Documents

    Data Model Overview
    Resource Map Implementation in Atom
    Resource Map Discovery

ORE Specification Documents

    Abstract Data Model
    Resource Map Profile of Atom

Open Issues

    Collected Open Issues for all ORE User Guide and Specification Documents

Table of Contents

1. Introduction
2. Specifications
3. User Guide
4. Additional Resources
5. References


A. Acknowledgements
B. Change Log

1. Introduction

The World Wide Web is built upon the notion of atomic units of information called resources that are identified with URIs such as (this page). In addition to these atomic units, aggregations of resources are often units of information in their own right.  Examples of these aggregations are:

A mechanism to associate identities with these aggregations and describe them in a machine-readable manner would make them visible to Web agents, both humans and machines.  This could be useful for a number of applications and contexts.  For example:

2. Specifications

The OAI-ORE specifications are based around the ORE Model described in ORE Specification - Abstract Data Model. The ORE Model introduces the Resource Map that makes it possible to associate an identity with aggregations of resources and make assertions about their structure and semantics.

The ORE Model makes use of a number of terms from existing Semantic Web vocabularies and introduces a small number of new terms particular to the model. These are described in ORE Specification - Vocabulary.

The primary serialization format for Resource Maps is a profile of Atom and is described in ORE Specification - Resource Map Profile of Atom. However, because the ORE Model is expressed in RDF, Resource Maps may also be serialized in any format capable of serializing RDF. A GRDDL crosswalk from Atom XML to RDF/XML is provided and we anticipate that later releases of these specifications will describe other serializations.

3. User Guide

A number of User Guide documents are provided to help implementers use the ORE Specifications. A brief summary of the ORE Model is given in ORE User Guide - Data Model Overview. The ORE User Guide - Resource Map Implementation in Atom gives practical details and advice on how to implement ORE Specification by creating Resource Maps in the Atom format.

The ORE User Guide - Resource Map Discovery introduces and describes a number of mechanisms for the discovery of Resource Maps by automated agents and browsers.

4. Additional Resources

Addition resources that are also described in the ORE Specification - Resource Map Profile of Atom are the Schematron Schema for the Resource Map Profile and the GRDDL crosswalk from Atom XML to RDF/XML.

The ORE logo used at the top right of this page is available in a number of different sizes and in a form better suited for use as a small icon. These are described on the ORE Logos page.

5. References

[Lynch CTWatch]
The Shape of the Scientific Article in The Developing Cyberinfrastructure, C. Lynch, CTWatch Quarterly, August 2007.
[Value Chains]
An Interoperable Fabric for Scholarly Value Chains, H. Van de Sompel, C. Lagoze, J. Bekaert, X. Liu, S. Payette, S. Warner, D-Lib Magazine, 12(10), October 2006.

A. Acknowledgements

This document is the work of the Open Archives Initiative. Funding for Open Archives Initiative Object Reuse and Exchange is provided by the Andrew W. Mellon Foundation, Microsoft, and the National Science Foundation.  Additional support is provided by the Coalition for Networked Information.

This document is based on meetings of the OAI-ORE Technical Committee (ORE-TC), with participation from the OAI-ORE Liaison Group (ORE-LG).  Members of the ORE-TC are: Chris Bizer (Freie Universität Berlin), Les Carr (University of Southampton), Tim DiLauro (Johns Hopkins University), Leigh Dodds (Ingenta), David Fulker (UCAR), Tony Hammond (Nature Publishing Group), Pete Johnston (Eduserv Foundation), Richard Jones (Imperial College), Peter Murray (OhioLINK), Michael Nelson (Old Dominion University), Ray Plante (NCSA and National Virtual Observatory), Rob Sanderson (University of Liverpool), Simeon Warner (Cornell University), and Jeff Young (OCLC).  Members of ORE-LG are: Leonardo Candela (DRIVER), Tim Cole (DLF Aquifer and UIUC Library), Julie Allinson (JISC), Jane Hunter (DEST), Savas Parastatidis  (Microsoft), Sandy Payette (Fedora Commons), Thomas Place (DARE and University of Tilburg), Andy Powell (DCMI), and Robert Tansley (Google, Inc. and DSpace)

We also acknowledge comments from the OAI-ORE Advisory Committee (ORE-AC).

Many thanks to the Digital Library Research & Prototyping Team of the Los Alamos National Laboratory for their inspiring explorations into Atom and ORE space: Lyudmilla Balakireva, Ryan Chute, Stephan Drescher, Alberto Pepe, Zhiwu Xie.

B. Change Log

Date Editor Description
2007-12-10 simeon public alpha release
2007-10-15 simeon alpha release to ORE-TC
OREA Resource Map for this page is available at

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