<annotation>

Baseline 2023

Newly available

Since January 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The <annotation> MathML element contains an annotation to the MathML expression in a textual format, for example LaTeX.

Note: Annotations are not supposed to be rendered by browsers and are hidden by default. However, Firefox and Safari render some annotation formats if the first child of the <semantics> element contains errors or is missing.

Attributes

This element's attributes include the global MathML attributes as well as the following attributes:

encoding: The encoding of the semantic information in the annotation (e.g. "application/x-tex")
src Deprecated: The location of an external source for semantic information.

Example

html,
body {
  height: 100%;
}

body {
  display: grid;
  place-items: center;
  font-size: 1.5rem;
}

html

<math display="block">
  <semantics>
    <!-- The first child is the MathML expression rendered by default. -->
    <mrow>
      <msup>
        <mi>x</mi>
        <mn>2</mn>
      </msup>
      <mo>+</mo>
      <mi>y</mi>
    </mrow>

    <!-- Annotate with LaTeX, a lightweight markup language. -->
    <annotation encoding="application/x-tex">x^{2} + y</annotation>
  </semantics>
</math>

Technical summary

Implicit ARIA role	None

Specifications

Specification
MathML Core # semantics-and-presentation

Browser compatibility

BCD tables only load in the browser