<usage>
The <usage> tag is used inside of a <notation> block to
specify how a particular piece of mathematical notation is used. Content placed
inside of a <usage> tag will only be displayed inside of a <notation-list/>
tag, and will not show up in the immediately surrounding text.
Syntax
Attributes
This tag has no attributes.Children
The following may appear as children:<m> Parents
This element may appear as an immediate child of the following elements:<notation>