<xsl:apply-templates select="Temsis"/>

that would select elements with local name Temsis and no namespace
(teh default namespace does not apply to XPath which foollows the same
rules as for attributes)

you want
    <xsl:apply-templates select="t:Temsis"/>

and xmlns:t="http://www.mysite.com/Temsis" on your xsl:stylesheet.

David

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 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list