Google is now allowing publishers to mark up their content with this live blog schema, in order to communicate to Google that the content is a “live blog” format. Google will then reserve the right to display the live label on the content in the publisher carousels section.
Google said this is available today for publishers, saying, “We are making the markup that powers these live blog carousels publicly available.” Publishers interesting in exploring this can review the live blog schema. The Guardian, the Washington Post, The Telegraph and platform provider ScribbleLive are already participating in this.
Here is a GIF showing it in action: