There are two built in template in XSLT. The first processes all child elements for any element that does not have a specific template:
Code:
<xsl:template match="*">
<xsl:apply-templates />
</xsl:template>
The second output all text from text nodes:
Code:
<xsl:template match="text()">
<xsl:value-of select="."/>
</xsl:template>
These two templates apply whatever values you have for mode.
Without seeing your XSLT and input XML it is hard to say anything more specific.