Ensuring that a text component remains in a sans serif font is typically used when marking a mathematical equation, expression, or formula or a chemical expression, reaction, or equation.

Emphasis as a Toggle Switch: The @toggle attribute controls the behavior of this element. When the value of @toggle is set to “no”, the emphasized text remains in the requested style, no matter what the surrounding text does. When the value of @toggle is “yes”, if the surrounding text matches what the emphasized text would be the text within this element is not emphasis-styled, so that this text will always be typographically distinct from its surroundings.

Using the element <italic> as an example, setting the @toggle attribute to “no” would mean that a material marked as italics will always be italics, even in an italic context. In contrast, if the @toggle attribute was set to “yes” on the <italic> element, if the formatting context imposes italics (whether due to another <italic> element, a stylesheet, some CSS, or other means), then the italics would be turned off within that context, making the emphasized text emphasized by contrast, but not italic. The <italic> element would still produce italics everywhere else.