Crossref is a not-for-profit membership organization providing certain technology services to the scholarly community on a noncommercial basis.
Crossref Event Data [the “Service”] is a Crossref service which provides a unique record of the relationship between web activity and specific scholarly content items (e.g. a journal article which has been referenced on a Wikipedia page). The Service is a hub for the collection, storage and distribution of data concerning these relationships. When a relationship is observed between a Crossref-registered content item and a specific web activity, the data is expressed in the Service as an “Event”. An “Event” is the record of a relationship between an item of registered content and a specific activity. The Service provides Events from a variety of web sources. Each web source is referred to as a “Data Contributor”. A “Data Contributor” means the location where a relationship was observed. The Events, and all original data from the Data Contributor, are available in the Service via an API.
To facilitate data access and maximal reuse, all Events provided in the Service are tagged with a license that is conformant with the principles laid out in the Open Definition. This ensures that data made available in the Service can be made publicly available and reused, in accordance with the conditions of the specific licence associated with each Event. To this end, the service will only include data from Data Contributors who can provide this to the service via a license conformant with the Open Definition.
The Crossref Event Data service will respect the restrictions provided in robots.txt to ensure the service does not follows links when directed not to by these files. In addition, like search engines, Crossref runs software which visits websites. Events from our Newsfeeds, Reddit Links and Web sources are derived in this way.
Data from all Data Contributors is made available in the Service via the Creative Commons CC-0 1.0 license waiver, with the exception of the following Data Contributors listed below:
|Crossref Metadata||Made available without restriction|
|Cambia Lens||Creative Commons CC-BY-SA 4.0|
|Stack Exchange Network||Creative Commons CC-BY 4.0|
Where there are specific privacy policies of which Crossref is aware, that are associated with a particular Data Contributor, they are listed below.
Please email us at firstname.lastname@example.org with any questions or feedback.