You gave me an idea: I want the text node immediately following a div with an
  index class. Then I could use substring-after(., $LF)?
  Regards, Manfred

If I understand you correctly you mean something like

 <xsl:template match="text()[contains(.,'&#10;')]
                            [preceding-sibling::node()[1]/self::div/@class='index']"
 >
<xsl:value-of select="substring-after(.,'&#10;')"/>
</xsl:template>


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