<?xml version=“1.0” standalone=“yes”?> <svg xmlns=“www.w3.org/Graphics/SVG/svg-19990412.dtd” width=“4in” height=“3in”>
<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>