Some of you who have submitted content to us during the first two months of 2021 may have experienced content registration delays. We noticed; you did, too.
The time between us receiving XML from members, to the content being registered with us and the DOI resolving to the correct resolution URL, is usually a matter of minutes. Some submissions take longer - for example, book registrations with large reference lists, or very large files from larger publishers can take up to 24 to 48 hours to process.
TL;DR: We have a Community Forum (yay!), you can come and join it here: community.crossref.org.
Community is fundamental to us at Crossref, we wouldn’t be where we are or achieve the great things we do without the involvement of you, our diverse and engaged members and users. Crossref was founded as a collaboration of publishers with the shared goal of making links between research outputs easier, building a foundational infrastructure making research easier to find, cite, link, assess, and re-use.
Event Data uncovers links between Crossref-registered DOIs and diverse places where they are mentioned across the internet. Whereas a citation links one research article to another, events are a way to create links to locations such as news articles, data sets, Wikipedia entries, and social media mentions. We’ve collected events for several years and make them openly available via an API for anyone to access, as well as creating open logs of how we found each event.
2020 wasn’t all bad. In April of last year, we released our first public data file. Though Crossref metadata is always openly available––and our board recently cemented this by voting to adopt the Principles of Open Scholarly Infrastructure (POSI)––we’ve decided to release an updated file. This will provide a more efficient way to get such a large volume of records. The file (JSON records, 102.6GB) is now available, with thanks once again to Academic Torrents.
Reference linking enables researchers to follow a link from the reference list to other full-text documents, helping them to make connections and discover new things.
To link references, you don’t need to be a Crossref member. Reference linking means including Crossref DOIs (displayed as URLs) when you create your citation list. This enables researchers to follow a link from a reference list to other full-text documents, helping them to make connections and discover new things. And because it’s a DOI rather than just a link, it will remain persistent.
Soleimani N, Mohabati Mobarez A, Farhangi B. Cloning, expression and purification flagellar sheath adhesion of Helicobacter pylori in Escherichia coli host as a vaccination target. Clin Exp Vaccine Res. 2016 Jan;5(1):19-25.
Display the DOI link:
Soleimani N, Mohabati Mobarez A, Farhangi B. Cloning, expression and purification flagellar sheath adhesion of Helicobacter pylori in Escherichia coli host as a vaccination target. Clin Exp Vaccine Res. 2016 Jan;5(1):19-25. https://doi.org/10.7774/cevr.2016.5.1.19
Because Crossref is all about rallying the scholarly community to work together, reference linking is an obligation for all Crossref members and for all current journal content (published during this and the two previous years). It is encouraged for other content types (such as books and conference proceedings), and for backfiles (published longer ago).
Watch the introductory reference linking animation in your language:
Persistent links enhance scholarly communications. Reference linking offers important benefits:
Reciprocity: members’ content is linked together and more discoverable because all members link their references.
Crossref acts as a clearinghouse, negotiating reciprocal agreements among all its members so that individual members can avoid the inconvenience of signing bilateral agreements to link to persistent content on other platforms. The result is a scholarly communications infrastructure that enables the exchange of ideas and knowledge.
Discoverability: research travels further when everyone links their references. Because DOIs don’t break if implemented correctly, they will always lead readers to the content they’re looking for, including yours. When the DOIs are displayed, anyone can copy and share them.
This will enable better tracking of where and when people are talking about and sharing scholarly content, including in social media.
Obligations and fees for reference linking
There’s no charge for reference linking but it is an obligation of membership. Reference linking is required for all Crossref members and for all current journal content. We’d encourage you to also add reference linking for backfile journals, and for other content types.
To link references, you do not need to be a member, but reference linking is an obligation for Crossref members. When your organization becomes a Crossref member, look up the DOIs for your references, and add the DOI (as a URL) to reference lists for your content items.
Best practice for reference linking
Start reference linking within 18 months of joining Crossref
Link references for backfile as well as current journal content
Link references in non-journal content types such as books, and conference proceedings.