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The math element from the
MathML namespace falls into the
embedded content, phrasing content, and flow content categories for the purposes of
the content models in this specification.
The semantics of MathML elements are defined by the MathML specification and other applicable specifications. [MATHML]
Here is an example of the use of MathML in an HTML document:
<!DOCTYPE html>
<html>
<head>
<title>The quadratic formula</title>
</head>
<body>
<h1>The quadratic formula</h1>
<p>
<math>
<mi>x</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mo form="prefix">−</mo> <mi>b</mi>
<mo>±</mo>
<msqrt>
<msup> <mi>b</mi> <mn>2</mn> </msup>
<mo>−</mo>
<mn>4</mn> <mo>⁢</mo> <mi>a</mi> <mo>⁢</mo> <mi>c</mi>
</msqrt>
</mrow>
<mrow>
<mn>2</mn> <mo>⁢</mo> <mi>a</mi>
</mrow>
</mfrac>
</math>
</p>
</body>
</html>
The svg element from the
SVG namespace falls into the embedded content, phrasing content, and flow content categories for the purposes of
the content models in this specification.
When the SVG foreignObject element
contains elements from the HTML namespace, such elements must all be
flow content. [SVG]
The content model for title elements in
the SVG namespace inside HTML
documents is phrasing content. (This further
constrains the requirements given in the SVG specification.)
The semantics of SVG elements are defined by the SVG specification and other applicable specifications. [SVG]
The SVG specification includes requirements regarding the
handling of elements in the DOM that are not in the SVG namespace,
that are in SVG fragments, and that are not included in a
foreignObject element. This
specification does not define any processing for elements in SVG
fragments that are not in the HTML namespace; they are considered
neither conforming nor non-conforming from the perspective of this
specification.