Alpha channel blending conformance requirement

The Conformance chapter [1] currently states

"The viewer must support alpha channel blending of the image of the SVG content onto the target canvas."

I'm thinking this should be expanded to say something like:
"Areas of an image of SVG content may have opacity less than 100%. The viewer must at least support Simple Alpha Compositing of the image of the SVG content onto the target canvas, as described in the Compositing and Blending Specification [COMPOSITING-BLENDING]."

Simple Alpha Compositing is defined in Blending and Compositing Level 1 [2].
If they so choose, implementations can then go beyond this to support mix-blend-mode, etc.

What do others think?

1. https://svgwg.org/svg2-draft/conform.html
2. http://www.w3.org/TR/compositing-1/#simplealphacompositing
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