Hypothes.is will be a distributed, open-source platform for the collaborative evaluation of information. It will enable sentence-level critique of written words combined with a sophisticated yet easy-to-use model of community peer-review. It will work wherever you are—as an overlay on top of news, blogs, scientific articles, books, terms of service, ballot initiatives, legislation and regulations, software code and more—without requiring participation of the underlying site.

It is based on a new draft standard for annotating digital documents currently being developed by the Open Annotation Collaboration, a consortium that includes the Internet Archive, NISO, O’Reilly Books, Amazon, Barnes and Noble, and a number of academic institutions.