Re: [xsl] Passing parameter into tag name

["Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

My preference when I see poorly-designed XML like this is to start by writing
a transformation that turns it into well-designed XML, in this case
converting

> <Level_1_Amt>100</Level_1_Amt>

to

> <Amt level="1">100</Amt>

The great advantage of this is that you only need to do it once; from then on
you can work with your easier-to-manipulate XML.

Michael Kay
Saxonica

> On 12 Apr 2017, at 14:06, Steve Wisniewski stevewiz76@xxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hello all,
>
> I have a data scenario like this (edited down for clarity) where I have
multiple tags that have the actual level number in the tag name:
>
> <foo>
> 	<Level>
> 		<Level_No>1</Level_No>
> 	</Level>
> 	<Level>
> 		<Level_No>2</Level_No>
> 	</Level>
> 	<Level>
> 		<Level_No>3</Level_No>
> 	</Level>
> 	<Cost ID='1'>
> 			<Level_1_Amt>100</Level_1_Amt>
> 			<Level_2_Amt>200</Level_2_Amt>
> 			<Level_3_Amt>300</Level_3_Amt>
> 	</Cost>
> 	<Cost ID='2'>
> 			<Level_1_Amt>50</Level_1_Amt>
> 			<Level_2_Amt>100</Level_2_Amt>
> 			<Level_3_Amt>150</Level_3_Amt>
> 	</Cost>
> 	<Cost ID='3'>
> 			<Level_1_Amt>175</Level_1_Amt>
> 	</Cost>
> 	<Cost ID='4'>
> 			<Level_3_Amt>400</Level_3_Amt>
> 	</Cost>
> </foo>
>
> I am trying to sum up the amounts in the following code, but am getting a
syntactical error about how I am trying to pass the parameter value into the
tag name:
>
> <xsl:stylesheet version="2.0" xmlns="http://www.w3.org/1999/xhtml";
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";>
> 	<xsl:output method="xml" indent="yes"/>
>
> 	<xsl:template name="buildLevel">
> 		<xsl:param name="levelNum"/>
> 		<Level_Amt>
> 			<xsl:value-of select="sum(/Story/Level_{$levelNum}_Amt)"/>
> 		</Level_Amt>
> 	</xsl:template>
>
> 	<xsl:template match="Cost">
> 		<xsl:for-each select="/foo/Level">
> 			<Level>
> 				<xsl:call-template name="buildLevel">
> 					<xsl:with-param name="levelNum" select="Level_No"/>
> 				</xsl:call-template>
> 			</Level>
> 		</xsl:for-each>
> 	</xsl:template>
>
> </xsl:stylesheet>
>
> Is there a way I can do something like this? I am trying to avoid explicitly
calling each tag by name since there could be up to 9 levels in the data and
there are multiple tags that have the level number in them. Thank you in
advance.
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