“SVG Native is a subset of SVG 1.1, which removes animation, interactivity, linking, remote resource loading, scripting, and CSS ”

So anyone who supports svg 1.1 supports this automatically. I guess it helpa define/narrow a small svg subset to target if you write a new renderer. For instance rendering with JavaFX primitives, this would maybe be achievable

And this new thing also sounds kinda like a subset of svg..