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www.crossref.org
• Not-for-profit network founded early 2000
• First full-scale implementation of DOI
• PILA: Publishers Independent Linking Association, Inc.
• 168 publishers/societies
• 60 libraries
• 29 intermediaries
What CrossRef is not:
• A product for sale• An article database• A direct-to-end-user service• A search interface• A broker of full-text content• A consortium of big commercial publishers• CrossRef: complete citation linking backbone for
all scholarly literature online (new as well as old)
For Whom?
• Any publisher of primary research material in digital form
• Libraries for localized linking solutions, enriching online catalogues and databases with links to their own full-text holdings
• Secondary publishers and journal hosting services
• Technology companies
Key Benefits
• No state links: a DOI link is a persistent link in citations and databases
• A single agreement rather than numerous bilateral linking agreements
• Newest literature: outbound links to the latest cited sources
• Higher accessibility through inbound links• Central DOI Directory
How the System works (A)
• Join as a member and receive a DOI prefix• Create your own DOI (using the prefix) and
assign it the article`s metadata and URL• Submit the record in a strict XML-based
DTD format to the CrossRef MDDB• CrossRef registers each article DOI and
URL in a central directory, thus allowing for permanent inbound links
How the System works (B)
• In a separate process, the publishers also submits the citations contained in each article to the Reference Resolver, the front-end component of the MDDB
• The publisher, library, XYZ can add outbound links to any of the article´s citation
• Special querying and look-up process
Why Libraries participate?
• Library users want to navigate directly from citations or database records to journal articles
• Library records do not contain article-level information or links
• CrossRef is a key piece of the puzzle in localized linking solutions for digital collections
• CrossRef does not compete with OpenURL, which is a syntax for transporting metadata within URLs
• All CrossRef publishers are OpenURL compliant
Some numbers & Other Information
• 1,2 million resolutions in April 2002
• Deposits for over 5 million articles
• Backfile content is being added, e.g. APS goes back to 1893
• Solution for the „appropriate copy problem“
• Linking to non-journal content, beginning with conference proceedings and books
Some Cooperations
• International DOI Foundation (IDF)• Corporation for National Research
Initiatives (CNRS): Handle System• Ex Libris• OhioLINK• Los Alamos National Laboratory• Board of Directors representing many
parties
