MathML generated by MathToWeb
A MathML example displaying the AMS-Latex extensible right arrow, \xrightarrow{...}.
This example shows the correct method of adding text above the arrow, using a call to \text{..}.

${\displaystyle \stackrel{ \text{this converts to} }{⟶}}$ $\xrightarrow{ \text{this converts to} }$

<math xmlns="http://www.w3.org/1998/Math/MathML">
<mrow>
	<mstyle displaystyle="true">
		<mover>
			<mo stretchy="true">&xrarr;</mo>
			<mrow>
				<mo>&nbsp;</mo>
				<mtext>this&nbsp;converts&nbsp;to</mtext>
				<mo>&nbsp;</mo>
			</mrow>
		</mover>
	</mstyle>
</mrow>
</math>