Except HTML is already a presentational markup language. People lose track of this.
Consider: MathML has a presentational schema and a content schema. The whole point of presentational MathML is the intermingling of concerns. If you want interoperable data, you use content MathML.
Interoperability is a noble goal, but if you want HTML to do everything you're already barking up the wrong tree.
Consider: MathML has a presentational schema and a content schema. The whole point of presentational MathML is the intermingling of concerns. If you want interoperable data, you use content MathML.
Interoperability is a noble goal, but if you want HTML to do everything you're already barking up the wrong tree.