XSLT call template on a string with delimiter - xslt

Question

My input xml is this
<StepSchedule>
<StepRateEffectiveDate>20191204</StepRateEffectiveDate>
<StepRate>3.400000</StepRate>
</StepSchedule>
<StepSchedule>
<StepRateEffectiveDate>20200304</StepRateEffectiveDate>
<StepRate>2.250000</StepRate>
</StepSchedule>
<StepSchedule>
<StepRateEffectiveDate>20200604</StepRateEffectiveDate>
<StepRate>2.000000</StepRate>
</StepSchedule>
<StepSchedule>
<StepRateEffectiveDate>20201204</StepRateEffectiveDate>
<StepRate>1.510000</StepRate>
</StepSchedule>
My xslt where I need to reformat the dates to a different format
<xsl:call-template name="date-formatter">
<xsl:with-param name="date" select="./*:StepSchedule/*:StepRateEffectiveDate" />
</xsl:call-template>
<xsl:template name="date-formatter">
<xsl:param name="date" />
<xsl:variable name="year" select="substring($date, 1, 4)" />
<xsl:variable name="month" select="substring($date, 5, 2)" />
<xsl:variable name="day" select="substring($date, 7, 2)" />
<xsl:value-of select="concat($year,'-',$month,'-',$day,'T00:00:00')" />
</xsl:template>
When I run the transformation I get the following error
Transform terminated: 'Type check error. In call to built-in function 'substring', expected type '{http://www.w3.org/2001/XMLSchema}string?' for argument 1 ('$sourceString' in namespace '') but found more than one item.
When the input only contains one StepSchedule node it works fine, the problem is when there is more than one.

Answer 1

The context is not really clear, but if you replace
<xsl:call-template name="date-formatter">
<xsl:with-param name="date" select="./*:StepSchedule/*:StepRateEffectiveDate" />
</xsl:call-template>
by
<xsl:template match="/">
<xsl:for-each select="//StepRateEffectiveDate">
<xsl:call-template name="date-formatter">
<xsl:with-param name="date" select="."/>
</xsl:call-template>
</xsl:for-each>
</xsl:template>
it seems to work. I'm not sure what your XPath is trying to select.
See it working here: https://xsltfiddle.liberty-development.net/bET2rWP