merror element - MathML Reference

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Element:	merror
Attributes:	class \| id \| other \| style \| xlink:href \| xref \|
Parents:	apply \| bvar \| ci \| cn \| condition \| csymbol \| declare \| degree \| domainofapplication \| fn \| interval \| lambda \| list \| logbase \| lowlimit \| maction \| math \| matrix \| matrixrow \| menclose \| merror \| mfenced \| mfrac \| mlabeledtr \| mmultiscripts \| momentabout \| mover \| mpadded \| mphantom \| mroot \| mrow \| msqrt \| mstyle \| msub \| msubsup \| msup \| mtable \| mtd \| mtr \| munder \| munderover \| otherwise \| piece \| reln \| semantics \| set \| uplimit \| vector \|
Children:	apply \| ci \| cn \| complexes \| csymbol \| declare \| emptyset \| eulergamma \| exponentiale \| false \| fn \| imaginaryi \| infinity \| integers \| interval \| lambda \| list \| maction \| maligngroup \| malignmark \| matrix \| matrixrow \| menclose \| merror \| mfenced \| mfrac \| mi \| mlabeledtr \| mmultiscripts \| mn \| mo \| mover \| mpadded \| mphantom \| mprescripts \| mroot \| mrow \| ms \| mspace \| msqrt \| mstyle \| msub \| msubsup \| msup \| mtable \| mtd \| mtext \| mtr \| munder \| munderover \| naturalnumbers \| none \| notanumber \| pi \| piecewise \| primes \| rationals \| reals \| reln \| semantics \| set \| true \| vector \|

XHTML document	MathML Source
---	<mfraction> <mrow> <mn> 1 </mn> <mo> + </mo> <msqrt> <mn> 5 </mn> </msqrt> </mrow> <mn> 2 </mn> </mfraction>
XHTML document	MathML Source
---	<merror> <mtext> Unrecognized element: mfraction; arguments were: </mtext> <mrow> <mn> 1 </mn> <mo> + </mo> <msqrt> <mn> 5 </mn> </msqrt> </mrow> <mtext> and </mtext> <mn> 2 </mn> </merror>