I see this is part of the Triptych project, an attempt to, among other things, bring more verbs into HTML forms. As I've said before one of my long-time dreams is to have HTML forms support methods other than GET and POST.

Clicking on forms is how humans interact with HTTP, and for some strange reason the web has evolved to omit many very important words us humans must use to communicate. While a machine is allowed to say `DELETE /widgets/123`, a human is forced to say `POST /widgets/123/delete` or `POST /widgets/123?_method=DELETE`.

This is not only semantically incorrect, but also results in idempotency and caching issues, and, perhaps worst of all, forces developers to maintain two separate APIs: nice, well-formed REST endpoints for machines, and separate kludgy endpoints for humans, who were granted a stunted language.