Open Annotation Core Data Model
Library Cataloging

Open Annotation Core Data Model


The W3C has published the Open Annotation Core Data Model.
Annotating, the act of creating associations between distinct pieces of information, is a pervasive activity online in many guises but lacks a structured approach. Web citizens make comments about online resources using either tools built in to the hosting web site, external web services, or the functionality of an annotation client. Comments about photos on Flickr, videos on YouTube, people's posts on Facebook, or mentions of resources on Twitter could all be considered as annotations associated with the resource being discussed. In addition, there a plethora of closed and proprietary web-based "sticky note" systems, and stand-alone multimedia annotation systems. The primary complaint about all of these systems is that the user created annotations cannot be shared or reused, due to a deliberate "lock-in" strategy within the environments where they were created, or at the very least the lack of a common approach to expressing the annotations.

The Open Annotation data model provides an extensible, interoperable framework for expressing annotations such that they can easily be shared between platforms, with sufficient richness of expression to satisfy complex requirements while remaining simple enough to also allow for the most common use cases, such as attaching a piece of text to a single web resource.
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