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.
You need to be a member of Crossref in order to get your Crossref prefix and register your content with us. Membership of Crossref is about more than just registering DOIs - find out more on our membership page. You can apply to join there too.
After you’ve applied for membership and paid your pro-rated membership fee for the remainder of the current year, we set you up with your own Crossref DOI prefix. We also help you set up the Crossref account credentials that you’ll use to access our systems and register your content.
There are three key steps to getting started, and you can even start step one before you’ve received your new prefix and credentials.
In order to get working DOIs for your content and share your metadata with the scholarly ecosystem, you need to register your content with Crossref.
Your metadata is stored with us as XML. Some members send us XML files directly, but if you’re not familiar with writing XML files, you can use a helper tool instead. There are three helper tools available - these are online forms with different fields for you to complete, and this information is converted to XML and deposited with Crossref for you.
A big decision to make as a new member is which of our content registration methods to use.
A DOI has several sections, including a prefix and a suffix. A DOI will always follow this structure:
https://doi.org/[your prefix]/[a suffix of your choice]
We provide you with your prefix, but you decide what’s in the suffix for each of your DOIs when you register them with us. Your DOIs will look something like this:
If you use the Crossref XML plugin for OJS, they can provide suffixes for you by default, but otherwise you’ll need to decide on your own suffix pattern. It’s important to keep this opaque.
As a DOI is a persistent identifier, the DOI string can’t be changed after it’s been registered. It’s therefore important that your DOI string is opaque and doesn’t include any human-readable information. This means that the suffix should just be a random collection of characters. It should not include any information about the work that could be changed in the future, to avoid a difference between the information in the DOI string, and the information in the metadata.
For example, 10.5555/njevzkkwu4i7g is opaque (and correct), but 10.5555/ogs.2016.59.1.1 is not opaque (and not correct); it encodes information about the publication name and date which may change in the future and become confusing or misleading. So don’t include information such as publication name initials, date, ISSN, issue, or page numbers in your suffix string.
a) Set the password on your Crossref account credentials
You’ll need a set of Crossref account credentials to access our content registration tools. We’ll send you an email so you can set your password.
b) Register your content
You should assign Crossref DOIs to anything that’s likely to be cited in the scholarly literature - journals and journal articles, books and book chapters, conference proceedings and papers, reports, working papers, standards, dissertations, datasets, and preprints.
Because DOIs are designed to be persistent, a DOI string can’t be changed once registered, and DOIs can’t be fully deleted. You can always update the metadata associated with a DOI, but the DOI string itself can’t change, and once it’s been registered, it will be included in your next content registration invoice. It’s important that you only register a DOI that you definitely want to use.
Working with Crossref is about more than just DOIs. When you register content with us, you do register the DOI and the resolution URL, but you also register a comprehensive set of metadata - rich information about the content. This metadata is then distributed widely and used by many different services throughout the scholarly community, helping with discoverability of your content.
If you are registering DOI records for journal articles, you will include metadata about the journal title that this article was published in. When you register your first article for a journal, be really careful about the journal title you enter - this will create a journal title record and any future submissions will have to match this. Your journal title doesn’t have to match the title in the ISSN portal, but if you do want it to match, make sure to check what this is before you register your first item.
Content registration instructions for helper tools:
When you register your content, you’ll receive a message telling you whether your submission has been successful, or whether there are any problems. If there are problems, your DOI may not be live so do check this message carefully.
Don’t forget to display your DOI on the landing page of each item you register - this is an obligation of membership. You’ll need to display your DOI as a link like this:
Our support team is available to help if you have any problems, and you may find help from others in our community on our Crossref Forum. We also run regular “Ask Me Anything” webinars for new members - learn more about our webinars and register to attend.
What happens next?
Once you’ve started registering your content with Crossref and displaying your DOIs on your landing pages, it doesn’t stop there. After you first join, we send you a series of onboarding emails to help you through the next stages. If you want to get started straight away, take a look at how to get started constructing your DOIs.
