How to translate \cases{...}. Online repository of examples

I'd like to know how to translate the following, which comes from The TeXBook (page 175), to MathML
===
$$|x| = \cases{x,&if $x$\ge 0$;\cr
    -x,&otherwise.\cr}$$
===

Or better yet, an online repository of examples.

--
Jonathan

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Received on Monday, 22 February 2010 16:35:06 UTC