data-versiondateattributes. The former attribute contains the URI of a snapshot of the linked resource that was created when referencing it. In the demonstrations, that information is used to provide a "Get from archive" option. The latter attribute contains the datetime of taking the snapshot. In combination with the URI of the original resource provided in the
hrefattribute of the link, it will result in the provision of a "Get near link date" option. This feature will find a snapshot of the bookmarked resource that was created around the time of taking the snapshot, even if the snapshot that was taken is itself not accessible.
data-versiondateattributes to robustify its links. When a link is clicked, a server-side script is called that checks whether it still works.
data-versiondateattribute is provided the user is offered a choice: visit the live resource or visit a snapshot that is obtained on the basis of the provided attributes. This approach deals with the content drift aspect of reference rot: a user can visit the snapshot that was created by the web page author to see what the linked page looked like when the link was put in place.
data-versiondateattribute on links with as value the date of bookmarking.