The HTML5 way is to use specialized HTML tags, where everything inside is treated as the other language: https://developer.mozilla.org/en-US/docs/Web/SVG/Eleme

The HTML5 way is to use specialized HTML tags, where everything inside is treated as the other language: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/svg https://developer.mozilla.org/en-US/docs/Web/SVG/Element/svg https://developer.mozilla.org/en-US/docs/Web/MathML/Element/math#HTML5_notation https://developer.mozilla.org/en-US/docs/Web/MathML/Element/... Yes, this is less flexible than XML namespaces. You couldn't do something like XLinks.