Crossref’s Similarity Check service is used by our members to detect text overlap with previously published work that may indicate plagiarism of scholarly or professional works. Manuscripts can be checked against millions of publications from other participating Crossref members and general web content using the iThenticate text comparison software from Turnitin.
It’s me! Back in January I wrote, The one constant in Crossref’s 20 years has been change. This continues to be true, and the latest change is that I’m happy to say that I will be staying on as Executive Director of Crossref. At the recent Crossref board meeting, I rescinded my resignation and the board happily accepted this.
Please help us welcome new faces at Crossref! Martyn, Sara, Laura, and Mark joined us very recently and we are happy they’re with us. Both Martyn and Sara have joined the Product team and this has given us the chance to reorganize the team into the following groups: content registration, scholarly stewardship, scholarly impact, metadata retrieval, and UX/UI leadership. Laura joined the Finance and Operations team to help make the billing process simple for our members. Mark joins the Technology team and one of his projects will be improving the Event Data service.
It is exciting to already see the impact of your contributions and look forward to what’s to come!
2020 hasn’t been quite what any of us had imagined. The pandemic has meant big adjustments in terms of working; challenges for parents balancing childcare and professional lives; anxieties and tensions we never had before; the strain of potentially being away from co-workers, friends, and family for a prolonged period of time. Many have suffered job losses and around the world, many have sadly lost their lives to the virus.
A DOI (digital object identifier) is a persistent identifier attached to content (such as an article, chapter). It’s displayed as a link, and looks like this:
As you can see, it has several parts:
https://0-doi-org.lib.rivier.edu/ = the DOI resolver: makes the DOI a URL (actionable)
10.5555 = prefix: assigned by Crossref
YFRU1371 = suffix: decided and assigned by the member, should be opaque.
The prefix and suffix make a DOI, and with the DOI resolver form a DOI link.
As we mention above, the suffix should be opaque. An opaque identifier does not encode or describe any information about the work, such as publication name, date, or ISSN. It’s important to avoid encoding any human-readable information, so if any of the metadata associated with the DOI changes, there is no confusion between the information encoded in the DOI and that found in its metadata.
For example, 10.5555/njevzkkwu4i7g is opaque, but 10.5555/ogs.2016.59.1.1 encodes information which may change and therefore could be confusing or misleading in future.
The DOI link uses the DOI resolver to look up the registered URL for the item. This shows why it’s important to keep the metadata up-to-date, so that the DOI points to the correct URL for the item.
DOIs at different levels
A DOI may refer to a journal or book (a title-level DOI), or to a specific article or chapter.
Journals and DOIs
Like a set of nesting dolls, a journal may be made up of volumes, each containing a number of issues, each containing a number of articles. You can assign a DOI at each level, for example:
journal-level-DOI (sometimes called the title-level-DOI) 10.5555/QYPF2031. Like an ISSN, it refers to the whole journal
The role of the journal-level-DOI, volume-level-DOI, and issue-level-DOI is to link persistently to a point in the journal structure. These DOIs do not have any associated content, and it does not cost anything to register these DOIs.
However, article-level-DOIs do have associated content, and therefore a fee applies to register these DOIs.
Books and DOIs
Like a set of nesting dolls, a book may be made up of chapters. Again, you can assign a DOI at each level, for example:
book-level-DOI (sometimes called the title-level-DOI) 10.5555/ZAAR1365. Just like an ISBN, it refers to the whole book.
Both book-level-DOIs and chapter-level-DOIs have associated content, and therefore a fee applies to register these DOIs.