Crossref Event Data: early preview now available

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Test out the early preview of Event Data while we continue to develop it. Share your thoughts. And be warned: we may break a few eggs from time to time!


Chicken by anbileru adaleru from the The Noun Project

Want to discover which research works are being shared, liked and commented on? What about the number of times a scholarly item is referenced? Starting today, you can whet your appetite with an early preview of the forthcoming Crossref Event Data service. We invite you to start exploring the activity of DOIs as they permeate and interact with the world after publication.

Rehashing PIDs without stabbing myself in the eyeball

Anybody who knows me or reads this blog is probably aware that I don’t exactly hold back when discussing problems with the DOI system. But just occasionally I find myself actually defending the thing…About once a year somebody suggests that we could replace existing persistent citation identifiers (e.g. DOIs) with some new technology that would fix some of the weaknesses of the current systems. Usually said person is unhappy that current systems like

Real-time Stream of DOIs being cited in Wikipedia


Watch a real-time stream of DOIs being cited (and “un-cited!” ) in Wikipedia articles across the world:


For years we’ve known that the Wikipedia was a major referrer of Crossref DOIs and about a year ago we confirmed that, in fact, the Wikipedia is the 8th largest refer of Crossref DOIs. We know that people follow the DOIs, too. This despite a fraction of Wikipedia citations to the scholarly literature even using DOIs. So back in August we decided to create a Wikimedia Ambassador programme. The goal of the programme was to promote the use of persistent identifiers in citation and attribution in Wikipedia articles. We would do this through outreach and through the development of better citation-related tools.

Crossref’s DOI Event Tracker Pilot


Crossref’s “DOI Event Tracker Pilot”- 11 million+ DOIs & 64 million+ events. You can play with it at:

Tracking DOI Events

So have you been wondering what we’ve been doing since we posted about the experiments we were conducting using PLOS’s open source ALM code? A lot, it turns out. About a week after our post, we were contacted by a group of our members from OASPA who expressed an interest in working with the system. Apparently they were all about to conduct similar experiments using the ALM code, and they thought that it might be more efficient and interesting if they did so together using our installation. Yippee. Publishers working together. That’s what we’re all about.

Introducing the Crossref Labs DOI Chronograph


At Crossref we mint DOIs for publications and send them out into the world, but we like to hear how they’re getting on out there. Obviously, DOIs are used heavily within the formal scholarly literature and for citations, but they’re increasingly being used outside of formal publications in places we didn’t expect. With our DOI Event Tracking / ALM pilot project we’re collecting information about how DOIs are mentioned on the open web to try and build a picture about new methods of citation.

Citation needed

Remember when I said that the Wikipedia was the 8th largest referrer of DOI links to published research? This despite only a fraction of eligible references in the free encyclopaedia using DOIs. We aim to fix that. Crossref and Wikimedia are launching a new initiative to better integrate scholarly literature in the world’s largest public knowledge space, Wikipedia. This work will help promote standard links to scholarly references within Wikipedia, which persist over time by ensuring consistent use of DOIs and other citation identifiers in Wikipedia references.

Many Metrics. Such Data. Wow.

[ Crossref Labs loves to be the last to jump on an internet trend, so what better than than to combine the Doge meme with altmetrics? Note: The API calls below have been superceeded with the development of the Event Data project. See the latest API documentation for equivalent functionality Want to know how many times a Crossref DOI is cited by the Wikipedia? Or how many times one has been mentioned in Europe PubMed Central?

Introductory Signals

So while doing some background reading today I realized that legal citations already widely support a form of “citation typing” in the form of “Introductory Signals“. The 10 introductory signals break down as follows… In support of an argument:    1) [no signal]. (NB that, apparently, this is increasingly deprecated.)    2) accord;    3) see;    4) see also;    5) cf.; For Comparisons:    6) compare … with …; For contradiction:    7) but see;

Citing Data Sets


thammond – 2007 March 30

In CitationData

This D-Lib paper by Altman and King looks interesting: “A Proposed Standard for the Scholarly Citation of Quantitative Data”. (And thanks to Herbert Van de Sompel for drawing attention to the paper.) Gist of it (Sect. 3) is

_“We propose that citations to numerical data include, at a minimum, six required components. The first three components are traditional, directly paralleling print documents. … Thus, we add three components using modern technology, each of which is designed to persist even when the technology changes: a unique global identifier, a universal numeric fingerprint, and a bridge service. They are also designed to take advantage of the digital form of quantitative data.

An example of a complete citation, using this minimal version of the proposed standards, is as follows:

**Micah Altman; Karin MacDonald; Michael P. McDonald, 2005, “Computer Use in Redistricting”,

hdl:1902.1/AMXGCNKCLU UNF:3:J0PkMygLPfIyT1E/8xO/EA==**


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