[xsl] split a string of expression into elements

Subject: [xsl] split a string of expression into elements
From: Ha Nguyen <hoangha2k3@xxxxxxxxx>
Date: Sun, 22 Feb 2004 11:17:10 -0800 (PST)
Hello !

I'd like to split a string of expressions into several
For example:
        x := b + c   

transform to sth like

       <left> x </left> 
             <operator> plus </operator>     
             <aleft> b </aleft>
             <aright> c </aright>

The expression may be not simple like that, meaning
that it contains more operations x:= b + c - d ... 

Can you give me some directions how to transform like
that ? Can xslt match the string according to a
regular expression and give the substring? 

Thanks for your attention.

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