Web Annotation as a First Class Object

Scholars have made handwritten notes and comments in books and manuscripts for centuries. Today's blogs and news sites typically invite users to express their opinions on the published content; URLs allow web resources to be shared with accompanying annotations and comments using third-party services like Twitter or Facebook. These contributions have until recently been constrained within specific services, making them second-class citizens of the Web. Web Annotations are now emerging as fully independent Linked Data in their own right, no longer restricted to plain textual comments in application silos. Annotations can now range from bookmarks and comments, to fine-grained annotations of a selection of, for example, a section of a frame within a video stream. Technologies and standards now exist to create, publish, syndicate, mash-up and consume, finely targeted, semantically rich digital annotations on practically any content, as first-class Web citizens. This development is being driven by the need for collaboration and annotation reuse amongst domain researchers, computer scientists, scientific publishers, and scholarly content databases.