Latest blog posts
Martyn Rittman
2024 November 15

Research Integrity Roundtable 2024

For the third year in a row, Crossref hosted a roundtable on research integrity prior to the Frankfurt book fair. This year the event looked at Crossmark, our tool to display retractions and other post-publication updates to readers. Since the start of 2024, we have been carrying out a consultation on Crossmark, gathering feedback and input from a range of members. The roundtable discussion was a chance to check and refine some of the conclusions we’ve come to, and gather more suggestions on the way forward.

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Dominika Tkaczyk
2024 November 06

How good is your matching?

In our previous blog post in this series, we explained why no metadata matching strategy can return perfect results. Thankfully, however, this does not mean that it’s impossible to know anything about the quality of matching. Indeed, we can (and should!) measure how close (or far) we are from achieving perfection with our matching. Read on to learn how this can be done! How about we start with a quiz? Imagine a database of scholarly metadata that needs to be enriched with identifiers, such as ORCIDs or ROR IDs.

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Kornelia Korzec
2024 October 28

Update on the Resourcing Crossref for Future Sustainability research

We’re in year two of the Resourcing Crossref for Future Sustainability (RCFS) research. This report provides an update on progress to date, specifically on research we’ve conducted to better understand the impact of our fees and possible changes. Crossref is in a good financial position with our current fees, which haven’t increased in 20 years. This project is seeking to future-proof our fees by: Making fees more equitable Simplifying our complex fee schedule Rebalancing revenue sources In order to review all aspects of our fees, we’ve planned five projects to look into specific aspects of our current fees that may need to change to achieve the goals above.

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Lucy Ofiesh
2024 September 24

Meet the candidates and vote in our 2024 Board elections

On behalf of the Nominating Committee, I’m pleased to share the slate of candidates for the 2024 board election. Each year we do an open call for board interest. This year, the Nominating Committee received 53 submissions from members worldwide to fill four open board seats. We maintain a balanced board of 8 large member seats and 8 small member seats. Size is determined based on the organization’s membership tier (small members fall in the $0-$1,650 tiers and large members in the $3,900 - $50,000 tiers).

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Documentation

Metadata Plus

Metadata Plus gives you enhanced access to all our supported APIs, guarantees service levels and support, and additional features such as snapshots and priority service/rate limits.

To use Metadata Plus, an optional paid-for service, you do not need to be a member. In addition to enhanced access to all our supported APIs (OAI-PMH and REST APIs) and metadata in XML and JSON, Metadata Plus provides you with:

  • a service level agreement guaranteeing you extra service and support, giving you a consistent and predictable experience
  • additional features such as snapshots and priority service/rate limits.

Metadata Plus users may use either or both of the included API interfaces:

Description of Service

FeatureDefined asNotes
SnapshotsUser-requested full-file downloads.

Data may be requested in JSON and XML via an interface separate from each API.

Pre-generated reports available via machine request and human user interface.		Filters based on commonly used data are in *under consideration*:
+ ISSN
+ Month and year
+ Publisher
+ Journal title
Priority Service/Rate LimitsPlus users will be prioritized via isolated resources.

Minimum number of queries per second per IP address.		Rate limiting of the API is primarily on a per IP basis. If a method allows, for example, for 150 requests per rate limit window, then it allows 150 requests per IP. This number can depend on the system state and may need to change. If it does, Crossref will publish it in the response headers.

In the exceptional event that a release is not backwards-compatible, Crossref will provide extensive lead time to communicate the changes, as part of our proactive support for Plus users.

How Metadata Plus works

Start by contacting us about Metadata Plus access. Plus subscribers can create their own API keys to use either or both the OAI-PMH and the REST API. Learn more in our extensive documentation for both the REST API and OAI-PMH interfaces.

Service level agreement (SLA)

Crossref will maintain an aggregated, average uptime for all of the interfaces that together comprise the Crossref Metadata Service of 99.5%, reported on a monthly basis. Crossref will provide technical support to Subscriber through Crossref’s existing support channels as requested by Subscriber, and will provide a response within one (1) business day to support requests received during normal working hours in the United States and the United Kingdom. “Business days” do not include weekends or legal holidays in the United States and the United Kingdom. “Response” means that support requests will be acknowledged. The time required for resolution will depend upon the nature of the request.

Agreement and fees for Metadata Plus

Learn more about the Metadata Plus service agreement, and fees and pricing tiers for Metadata Plus.

Page owner: Patrick Polischuk   |   Last updated 2020-April-08