Advantage of registering DOIs:
The key to metadata applications

Chuck Koscher
Director of Technology

DOI Outreach (Session #2), Tokyo December 3, 2015

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Where We Started-3

Not-for profit: PILA in 1999 then CrossRef in 2000
Set up by publishers to enable reliable reference linking.
Bringing together publishers and their data for the benefit of the wholecommunity.
16-member international board of directors from membership

What We Do-Network for Scholarly Community-Run services publishers cannot do individually
Facilitator for industry technical innovation
Extended to include other data and services thataddress the status and relationships of and between
scholarly works of all kinds.
Engage many types of organizations: Publishers and“non-publisher” publishers; Commercial and nonprofits; OA & Subscription; Funders; Researchers;
Libraries-4

CrossRef DOIs uniquely identify
content5

Crossref DOIs are not just for journals

677,459,757

We generate well over a billion annual ‘clicks’ to publishers’ sites
Annual CrossRef DOI Resolutions

1,750,000,000

1,400,000,000

1,050,000,000

700,000,000

350,000,000

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2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

20132014

So far in 2015 Crossref has serviced well over 5 billion requests
for metadata

5,000,000,0008

So how does this work?
Publishers give Crossref metadata• Basic citation metadata: • Optional metadata, e.g.

9– author(s)– journal title– article title– volume– Issue– page numbers– publication date
– book title– chapter title– references– funder information– ORCIDs– CrossMark publication
record metadata– Abstracts– License data

The DOI is the key for a metadata record

If you don’t have the key you can’t get the metadata

10Why a DOI?

It’s actionable, a person can click on a DOI link

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Why Crossref?
Crossref aggregates a lot of metadata
Statistics, May 201512

Total number participating publishers

5,945

Number of journals covered

39,015

Number of DOIs registered

73,615,189

Number of DOIs deposited last month

461,984

DOI resolutions (end-user-clicks) last month

124,765,975

Crossref provides service built on this metadata-13

Reference linking
Cited-By linking
Funding data (what articles result from a given award/grant)
Inter and Intra work relationships (ex: translations)
Important information for the reader (corrections, retractions … etc)
License terms for Text & Data Mining
2016: Doi Event Tracking

But almost as important, Crossref has APIs that let others retrieve ourmetadata and build their own services

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Academic Analytics, LLC
Academic Medical Center
Airiti, Inc.
Altmetric, LLC
American Chemical Society (ACS)
CambiaColwiz Limited
Copyright Clearance Center, Inc. (CCC)
DeepDyve, Inc.
EasyBib.com (ImagineEasy Solutions)Elsevier, Inc.
EMBL-EBIEx Libris Ltd.
Global Digital Central
Hindawi Publishing Corporation
Instytut Bioinfobank Sp. z o.o.
Labtiva, Inc.
mapegy GmbHMESUR
NASA ADS• OCLC• Ontario Council of University Libraries (OCUL)• PhilPapers Foundation• Plum Analytics• ProQuest Information & Learning• PTFS Europe• Reprints Desk
• Research Square• ScholarMate, Ltd.
• Science-Metrix• Sciencescape, Inc.
• Sunmedia• Suweco, CZ• Symplectic, Ltd.
• Talis Education Limited• Technical Information Center of Denmark (DTU Library)• The Korean Federation of Science and TechnologySocieties• Third Iron
• UberResearchExample: relations

Bis-A-Translation-of A

http://dx.doi.org/10.5555/original_language

A15

http://dx.doi.org/10.5555/translation

BExample: relations

AB

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Example: Orcid auto-update
crossrefpublisher
Article: ABC

DOI and metadata depositedauthor@orcid

Request permission
to post works toauthor’s record

author@email

Request forwarded
to author’s email
address

Permission
granted

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Work ABC and anyother works for thisauthor posted to theirrecord.

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Example: funding data

This is an example of what the metadata looks like19

Example: funding data20

Example: DOI Event Tracking

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Example: DOI Event Tracking
BLOGS & REFERENCE WORKS,
SOCIAL BOOKMARKS,
SOCIAL SHARES & DISCUSSIONS,LINKS TO RESEARCH ENTITIES
Research Blogging
CiteULike
Facebook
ORCiD
ScienceSeeker
Mendeley
Reddit
DataCite
Wordpress.com
Europe PMC Database Citations
Wikipedia
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Thank you

support@crossref.org
member@crossref.org

support.crossref.org

slideshare.net/CrossRef
youtube.com/CrossRefNews

crossref.org/CrossTech
crossref.org/crweblog• @CrossRefSupport• @CrossRefNews• linkedin.com/company/crossref
crossref.org/annualmeetingcrossref.org/01company/11conferences.html

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facebook.com/CrossRef