HTML5 MathML
HTML5 MathML <mfenced> Tag
The <mfenced> tag surrounds its child content with fences (brackets) and inserts separators between children. Its appearance is controlled by the open, close and separators attributes.
Definition and usage
The <mfenced> element provides a convenient shorthand for enclosing content in brackets. By default it uses parentheses, but the open and close attributes change the opening and closing fences, while separators lists the characters placed between each child.
Syntax
<mfenced open="(" close=")" separators=",">
<!-- children -->
</mfenced>Example
<math>
<mfenced open="[" close="]" separators=",">
<mi>x</mi>
<mi>y</mi>
</mfenced>
</math>This renders [x, y]. The single comma in separators is placed between the two children; with more children the separators string is applied in order.
The <mfenced> element is deprecated and is not part of MathML Core. The recommended replacement is an <mrow> containing explicit <mo> fence operators, for example <mo>[</mo> ... <mo>]</mo>.