Why XSLT?

You can parse an xml file with an xsl file and can generate an html document
using Xerces or XT. Then I wonder why these people introduced Xalan. Please
someone clarify me what are the advantages having XSLT and Xalan?

I would be grateful if someone can show me a case study which have been done
using XSLT.. send me a web link of a case study..

Forgive me. I am a beginner.
-Ranjith
ranjith@xxxxxxxxxx



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