in reply to Extracting XML data from a tree

Using XML::XSH2, a wrapper around XML::LibXML: 
open CC.xml ;
echo //Day[@day-of-week="Tuesday"]/Times/Time/@start-time ;

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In Section Seekers of Perl Wisdom