HTML5 MathML separator Attribute

Definition and usage

The separator attribute takes true or false. When true, the <mo> is treated as a separator (like a comma or semicolon) and given separator-appropriate spacing rather than binary-operator spacing. Characters like the comma have separator set to true by default in the operator dictionary.

Which elements use it

• <mo> - marks the operator as a separator token.

Example

<math>
  <mrow>
    <mo>(</mo>
    <mi>x</mi>
    <mo separator="true">,</mo>
    <mi>y</mi>
    <mo>)</mo>
  </mrow>
</math>

The comma between x and y is marked as a separator, so the browser applies tight leading space and normal trailing space appropriate for a list.