Web Science and Digital Libraries Research Group

Figure 1. An Annotation is defined by OAC  as a set of connected resources   In our  TPDL paper , we studied 6281 highlighted text annotations (out of 7744 annotations) available in the Hypothes.is annotation system in January 2015. The main goal was to investigate the prevalence of orphaned annotations, where neither a live Web page nor an archived copy of the web page contains the text that had previously been annotated. Recently, we applied the same analysis as in our TPDL paper to a larger number of annotations.  Figure 2 illustrates that the number of annotations in Hypothes.is has been increasing since July 2013. Our TPDL paper focused on the 7744 annotations available in January 2015.  Our updated paper (available at arXiv.org ) analyzed the 20,133 highlighted text annotations (out of 33,946 total annotations) available in August 2015.  In this post, I will focus on reporting results of our arXiv paper. Figure 2. January 2015 - dataset us...

Online annotating service is a tool that helps to annotate different resources with different authors and give this annotation a separate URI that can be shared using a Facebook post, blog post, tweet, etc. Web annotations can be described as a relation between different resources with different media types like text, image, audio, or video. The web annotation service will be able to provide: A unique URI for every annotation. Persistent annotations. Annotate specific part of media. Keep track of the resources. Present annotation in browser. Meet the OAC model requirements ( alpha3 release ) . Open Annotation Model: This service will generate annotations that meet the OAC model specification. In an annotation that contains different resources, the OAC will introduce a new resource that describes the relationships between the resources that make the annotation. Example: A user who is interested in wildlife is browsing a page about elephants in Africa, and he was interested in the map...

I've just finished attending the Open Annotation Collaboration (OAC) Phase II Workshop in Chicago, IL (March 24-25, 2011). The quality of the presentations was very high and I was surprised at how much the OAC community has grown in a relatively short time. Although I've served on OAC technical review panels before and my student, Abdulla Alasaadi, has worked on a small prototype (to be presented at JCDL 2011 ) for using SVG instead of the W3C Media Fragments for specifying an annotation target, I haven't been keeping up with the OAC community as closely as I should. The Workshop has all the presentations online , as well as a wiki that contains various commentary, use cases, etc. (also, the hash tag is " #oacwkshp "). Although all of the presentations generated a lot of discussion from the attendees, the presentations that I learned the most from were: Annotation Supporting Collaborative Development of Scholarly Editions ( Jane Hunter and Anna Gerbe...