| <svg width="4in" height="3in" | |
| xmlns = 'http://www.w3.org/Graphics/SVG/svg-19990412.dtd'> | |
| <desc>This example uses the switch element to provide a | |
| fallback graphical representation of an equation, if | |
| MathML is not supported. | |
| </desc> | |
| <!-- The <switch> element will process the first child element | |
| whose testing attributes evaluate to true.--> | |
| <switch> | |
| <!-- Process the MathML if the system-required attribute | |
| evaluates to true (i.e., the user agent supports MathML | |
| embedded within SVG). --> | |
| <foreignobject | |
| system-required="http://www.w3.org/TR/REC-MathML-19980407" | |
| width="100" height="50"> | |
| <!-- MathML content goes here --> | |
| </foreignobject> | |
| <!-- Else, process the following alternate SVG. | |
| Note that there are no testing attributes on the <g> element. | |
| If no testing attributes are provided, it is as if there | |
| were testing attributes and they evaluated to true.--> | |
| <g> | |
| <!-- Draw a red rectangle with a text string on top. --> | |
| <rect style="fill: red"/> | |
| <text>Formula goes here</text> | |
| </g> | |
| </switch> | |
| </svg> | |