This year, metadata development is one of our key priorities and we’re making a start with the release of version 5.4.0 of our input schema with some long-awaited changes. This is the first in what will be a series of metadata schema updates.
What is in this update?
Publication typing for citations
This is fairly simple; we’ve added a ‘type’ attribute to the citations members supply. This means you can identify a journal article citation as a journal article, but more importantly, you can identify a dataset, software, blog post, or other citation that may not have an identifier assigned to it. This makes it easier for the many thousands of metadata users to connect these citations to identifiers. We know many publishers, particularly journal publishers, do collect this information already and will consider making this change to deposit citation types with their records.
Every year we release metadata for the full corpus of records registered with us, which can be downloaded for free in a single compressed file. This is one way in which we fulfil our mission to make metadata freely and widely available. By including the metadata of over 165 million research outputs from over 20,000 members worldwide and making them available in a standard format, we streamline access to metadata about scholarly objects such as journal articles, books, conference papers, preprints, research grants, standards, datasets, reports, blogs, and more.
Today, we’re delighted to let you know that Crossref members can now use ROR IDs to identify funders in any place where you currently use Funder IDs in your metadata. Funder IDs remain available, but this change allows publishers, service providers, and funders to streamline workflows and introduce efficiencies by using a single open identifier for both researcher affiliations and funding organizations.
As you probably know, the Research Organization Registry (ROR) is a global, community-led, carefully curated registry of open persistent identifiers for research organisations, including funding organisations. It’s a joint initiative led by the California Digital Library, Datacite and Crossref launched in 2019 that fulfills the long-standing need for an open organisation identifier.
We began our Global Equitable Membership (GEM) Program to provide greater membership equitability and accessibility to organizations in the world’s least economically advantaged countries. Eligibility for the program is based on a member’s country; our list of countries is predominantly based on the International Development Association (IDA). Eligible members pay no membership or content registration fees. The list undergoes periodic reviews, as countries may be added or removed over time as economic situations change.
Crossref will be updating its DOI Display Guidelines within the next couple of weeks. This is a big deal. We last made a change in 2011 so it’s not something that happens often or that we take lightly. In short, the changes are to drop “dx” from DOI links and to use “https:” rather than “http:”. An example of the new best practice in displaying a Crossref DOI link is: https://doi.org/10.1629/22161
Hey Ho, “doi:” and “dx” have got to go
The updated Crossref DOI Display guidelines recommend that https://doi.org/ be used and not http://dx.doi.org/ in DOI links. Originally the “dx” separated the DOI resolver from the International DOI Foundation (IDF) website but this has changed and the IDF has already updated its recommendations so we are bringing ours in line with theirs.
We are also recommending the use of HTTPS because it makes for more secure browsing. When you use an HTTPS link, the connection between the person who clicks the DOI and the DOI resolver is secure. This means it can’t be tampered with or eavesdropped on. The DOI resolver will redirect to both HTTP and HTTPS URLs.
Timing and backwards compatibility
We are requesting all Crossref member publishers and anyone using Crossref DOIs to start following the updated guidelines as soon as possible. But realistically we are setting a goal of six months for implementation; we realize that updating systems and websites can take time. We at Crossref will also be updating our systems within six months - we already use HTTPS for some of our services and our new website (coming very soon!) will use HTTPS.
An important point about backwards compatibility is that “http://dx.doi.org/” and “http://doi.org/” are valid and will continue to work forever-or as long as Crossref DOIs continue to work-and we plan to be around a long time.
We need to do better
Reflecting on the 2011 update to the display guidelines it’s fair to say that we have been disappointed. It is still much too common to see unlinked DOIs in the form doi:10.1063/1.3599050 or DOI: 10.1629/22161 or even unlinked in this form: http://dx.doi.org/10.1002/poc.3551
What’s so wrong with this approach? To demonstrate, please click on this DOI doi:10.1063/1.3599050 - oh, you can’t click on it? How about I send you to a real example of a publisher page. What I’d like you to do is click the following link and then copy the DOI you find there and come back - http://dx.doi.org/10.1002/poc.3551.
Are you back? I expect you had to carefully highlight the “10.1063/1.3599050” and then do “edit”, “copy”. That wasn’t too bad but the next step is to put the DOI into an email and send it to someone. But wait - what are they going to do with “10.1063/1.3599050”? It’s useless. If you want it to be useful you’ll have to add “http://doi.org” or https://doi.org/ in the front.
When publishers follow the guidelines it makes things easier - if you go to https://doi.org/10.1063/1.3599050 you’ll note that you can just right click on the full DOI link on the page and get a full menu of options of what to do with it. One of which is to copy the link and then you can easily paste into an email or anywhere else.
However-putting a positive spin on the spotty adherence to the 2011 update to the DOI display guidelines-everyone has another chance with the latest set of updates to make all the changes at once!
More on HTTPS (future-proofing scholarly linking)
We take providing the central linking infrastructure for scholarly publishing seriously. Because we form the link between publisher sites all over the web, it’s important that we do our bit to enable secure browsing from start to finish. In addition, HTTPS is now a ranking signal for Google who gives sites using HTTPS a small ranking boost.
The process of enabling HTTPS on publisher sites will be a long one and, given the number of members we have, it may a while before everyone’s made the transition. But by using HTTPS we are future-proofing scholarly linking on the web.
Some years ago we started the process of making our new services available exclusively over HTTPS. The Crossref Metadata API is HTTPS enabled, and Crossmark and our Assets CDN use HTTPS exclusively. Last year we collaborated with Wikipedia to make all of their DOI links HTTPS. We hope that we’ll start to see more of the scholarly publishing industry doing the same.
