PUBLIC MARKS with tags annotation & rdf

The Platial API provides a set of methods for accessing and updating annotated geographical data. The API design is biased towards doing simple things simply, while providing a path for extension to complex cases via the RDF infrastructure. The initial focus is on annotation rather than representation of complex geography.

the Annozilla project, designed to view and create annotations associated with a web page, as defined by the W3C Annotea project. The idea is to store annotations as RDF on a server

When called upon, FlySketch will show its main drawing window above all other windows in the system. Change the transparency of the canvas, and you can trace, draw over, highlight, and capture just about anything that shows up behind FlySketch.

Annotation of things too