The document discusses modelling and exchanging annotations for Europeana projects. It proposes adopting the W3C Web Annotation Data Model to represent annotations in RDF using JSON-LD serialization. An Annotations API based on the W3C Web Annotation Protocol allows exchanging annotations between Europeana and platforms like HistoryPin.org and Pundit. Representing metadata annotations is also discussed to make them machine-readable and shareable across interfaces. Overall, modelling annotations interoperably and exchanging them across platforms is still a work in progress.