Re: xsl: mathml to latex?

"... I wonder if there exist some tools to convert the mathml markup to some 
latex equation markup? May there exist some XSLs doing this?"

MathML -> TeX

DSSSL approach. http://www.nag.co.uk/projects/openmath/mml-files .
XSLT approach. http://www.alphaworks.ibm.com/formula/texml .

MathML -> LaTeX

Custom XSLT/XPath style sheet depending on your original MathML 

Pankaj Kamthan