[OTVar] Feature tag as axis tag?

Belleve Invis

As @Peter Constable told me, there are some experiments about turning feature tags into axis tags. So generally is it a good idea? In fact some OT features can be really represented into variations (like ruby, which is pretty an example of opsz).

Dave Crossland

Like https://github.com/twardoch/varfonts-ofl/tree/master/ZinzinVF-OFL#zinzin-vf-ofl ?

Belleve Invis

@Dave Crossland
Yes, like this, while the range of feature-axis would be [0, +∞], and any non-zero value represents that this feature is on. A typical on value is 1.