If you follow learning analytics closely, you may be aware that there are two learning analytics standards—Caliper and xAPI—that appear competitive with each other at a casual glance. A webinar hosted by the Apereo Foundation between Anthony White, who is deeply involved with Caliper in the IMS working group on behalf of the University of Michigan, and Aaron Silvers, who works on xAPI through the Data Interoperability Standards Consortium (DISC), had an hour-long conversation about how the two standards relate to each other.
The Apereo news page where I found the video gives a disclaimer about the views of the presenters being solely their own, which sounds like a standard thing but leapt out at me as being a little odd in this context. I've heard second-hand rumblings that the growth of these two standards has re-envigorated the periodic diplomatic negotiations between the two standards bodies about how they should be working together (some of which is actually confirmed in the video), so I suspect that more than the usual care is being taken to make the conversation officially unofficial. Still, it's really helpful to hear two practitioners who are familiar with the respective specifications talk about the details, if you're into that sort of thing.