• Rob Sanderson, azaroth@stanford.edu, Stanford University Libraries
  • Naomi Dushay, ndushay@stanford.edu, Stanford University Libraries

Annotations on content resources allow users to contribute knowledge within the digital repository space. W3C Open Annotation provides a comprehensive model for web annotation on all types of content, using Linked Data as a fundamental framework. Annotation clients generate instances of this model, typically using a JSON serialization, but need to store that data somewhere using a standard interaction pattern so that best of breed clients, servers, and data can be mixed and matched.

Stanford is using Fedora4 for managing Open Annotations, via a middleware component called Triannon. Triannon receives the JSON data from the annotation client, and uses the Linked Data Platform API implementation in Fedora4 to create, retrieve, update and delete the constituent resources. Triannon could be easily modified to use other LDP implementations, or could be modified to work with linked data other than annotations.

Slides: http://www.slideshare.net/azaroth42/annotations-as-linked-data-with-fedora4-and-triannon


https://github.com/sul-dlss/triannon ( rails engine gem)
https://github.com/sul-dlss/triannon-service (rails app using triannon)
https://github.com/ld4l/open_annotation_rdf (active triples model gem)
https://github.com/ActiveTriples/ActiveTriples (active triples gem)
https://github.com/ruby-rdf/linkeddata (all teh RDF gems)
https://github.com/ruby-rdf/rdf (core rdf gem)
RDF vocabs:


http://www.openannotation.org/spec/core/ (Open Annotation) http://www.w3.org/TR/annotation-model/ (Annotation draft towards W3C technical recommendation) http://iiif.io/api/presentation/2/ (IIIF Presentation API) http://www.w3.org/TR/ldp (Linked Data Platform API) http://www.w3.org/TR/json-ld/ (JSON-LD)