The spec itself, though, is wholly controlled by Adobe. If someone else wanted to go in and make changes to the spec they could not do so. Compare this with HTM

The spec itself, though, is wholly controlled by Adobe. If someone else wanted to go in and make changes to the spec they could not do so. Compare this with HTML, which is definitely an open spec, and you can see the difference. It's like saying .NET is open: it's not, even though Mono exists.