A basic of example of cerror
<math xmlns="http://www.w3.org/1998/Math/MathML"> <cerror> <csymbol cd="aritherror">DivisionByZero</csymbol> <apply> <csymbol cd="arith1">divide</csymbol> <ci>x</ci> <cn>0</cn> </apply> </cerror> </math>
Author: MathML 3.0