As already discussed yesterday [2], the W3C charter for web annotations has completed with a Recommendation (final) status, that's what happened to it. The Open

As already discussed yesterday [2], the W3C charter for web annotations has completed with a Recommendation (final) status, that's what happened to it. The Open Annotation Group, on whose work it was based, has a github repo [1] (with last material updates around 2015/16) where it has maintained annotator and other libraries that are or were used by hypothes.es and other services. I have my reservations about using JSON-LD for this purpose, having the vibe of W3C looking for problems to their solutions, like they did with XML all over ie embedding JSON fragments into HTML script elements for metadata (!) when there's extensibility in HTML and/or RDFa already. Sadly, it's safe to say it never quite took off, and the only collaboration effort that has seen some use in quantities remains the much more modest pingback/linkback protocol. It's not clear to me, though, whether pingback is/was only popular because it could be exploited for DDoS attacks. [1]: https://github.com/openannotation https://github.com/openannotation [2]: https://news.ycombinator.com/item?id=36560937 https://news.ycombinator.com/item?id=36560937