Question regarding XSL

Hi all,
 I want to know if it is possible to associate different XSLs with a
particular XML at runtime. If say, for condition A I want to associate a.xsl
and for condition B, I want to associate b.xsl with a XML file, can I do it
and if so, how? Would it be possible for me to dynamically change the href
of the XML tag?
 Hope someone can help!!
Thanks and regards,
Meenakshi


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