William Adams wrote:

> Things which CSS font selection doesn't encompass:
> width
> optical size (as opposed to physical --- I left this out of my list)
> font features such as swash and contextual ligatures
> numberstyles
> They do have a nice numbering scheme for weight though (100--900)  
> which could be adapted --- there's no reason this couldn't be a  
> superset of CSS --- that's a very good idea and also use the  
> numbering scheme for widths.

Thank you for this.

So let me ask a question that William already hints at.

Could the 'Next Font Selection Scheme' be a superset of CSS?

Best regards