2020 has been a very challenging year, and we can all agree that everyone needs a break. Crossref will be providing very limited technical and membership support from 21st December to 3rd January to allow our staff to rest and recharge. We’ll be back on January 4th raring to answer your questions. Amanda explains more about why we made this decision.
On November 11th 2020, the Crossref Board voted to adopt the “Principles of Open Scholarly Infrastructure” (POSI). POSI is a list of sixteen commitments that will now guide the board, staff, and Crossref’s development as an organisation into the future. It is an important public statement to make in Crossref’s twentieth anniversary year. Crossref has followed principles since its founding, and meets most of the POSI, but publicly committing to a codified and measurable set of principles is a big step. If 2019 was a reflective turning point, and mid-2020 was about Crossref committing to open scholarly infrastructure and collaboration, this is now announcing a very deliberate path. And we’re just a little bit giddy about it.
While we wish we could be together in person to celebrate the fifth PIDapalooza, there’s an upside to moving it online: now everyone can participate in the universe’s best PID party! With 24 hours of non-stop PID programming, you’ll be able to come to the party no matter where you happen to be.
Send us your ideas for #PIDapalooza21 Now is your chance to share your work in the #PIDapalooza21 spotlight!
This blog was initially posted on the European Association of Science Editors (EASE) blog: “EASE Council Post: Rachael Lammey on the Research Nexus”. EASE President Duncan Nicholas accurately introduces it as a whole lot of information and insights about metadata and communication standards into one post…
I was given a wide brief to decide on the topic of my EASE blog, so I thought I’d write one that tries to encompass everything - I’ll explain what I mean by that.
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.libus.csd.mu.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.