Question

I have an XML file where the number are comma-separated

<foo>   <bar val='1,23'/>   <bar val='4,56'/>   <bar val='7,89'/> </foo> 

I would like to make a sum over /foo/bar/@val values in XSLT, but I am a bit stuck the formatting. Does anyone knows what would be the proper syntax?

Answer 1

I am guessing, that the value specified in a 'val' attribute is a number that has comma instead of a decimal point.

Several solutions are possible:

I. XSLT 1.0

This transformation:

<xsl:stylesheet version='1.0'  xmlns:xsl='http://www.w3.org/1999/XSL/Transform'  xmlns:ext='http://exslt.org/common'  >   <xsl:output method='text'/> <!--                                           -->       <xsl:template match='foo'>       <xsl:variable name='vrtfBars'>         <xsl:for-each select='bar'>           <bar val='{translate(@val, ',', '.')}'/>         </xsl:for-each>       </xsl:variable> <!--                                           -->       <xsl:value-of select=        'sum(ext:node-set($vrtfBars)/*/@val)'/>     </xsl:template> </xsl:stylesheet> 

when applied on the originally-provided XML document:

<foo>     <bar val='1,23'/>     <bar val='4,56'/>     <bar val='7,89'/> </foo> 

produces the wanted result:

13.68 

II. XSLT 2.0

This transformation:

<xsl:stylesheet version='2.0'  xmlns:xsl='http://www.w3.org/1999/XSL/Transform'  xmlns:xs='http://www.w3.org/2001/XMLSchema'  exclude-result-prefixes='f xs'  >  <xsl:output method='text'/> <!--                                           -->  <xsl:template match='foo'>   <xsl:sequence select=    'sum(bar/@val/number(translate(., ',', '.')))'     />  </xsl:template> </xsl:stylesheet> 

when applied on the same XML document, produces the same correct result:

13.68

III. FXSL 2.x

This transformation:

<xsl:stylesheet version='2.0'  xmlns:xsl='http://www.w3.org/1999/XSL/Transform'  xmlns:xs='http://www.w3.org/2001/XMLSchema'  xmlns:f='http://fxsl.sf.net/'  xmlns:my='my:fun'  exclude-result-prefixes='my f xs'  >    <xsl:import href='../f/func-transform-and-sum.xsl'/> <!--                                           -->  <xsl:output method='text'/> <!--                                           -->  <xsl:template match='foo'>   <xsl:sequence select=    'sum(         f:transform-and-sum(my:makeNum(), bar/@val )         )'     />  </xsl:template> <!--                                           -->  <xsl:function name='my:makeNum' as='xs:double'>    <xsl:param name='psNum' as='xs:string'/> <!--                                           -->    <xsl:sequence select='number(translate($psNum, ',', '.'))'/>  </xsl:function> <!--                                           -->  <xsl:function name='my:makeNum' as='element()'>    <my:makeNum/>  </xsl:function> <!--                                           -->  <xsl:template match='my:makeNum' as='xs:double' mode='f:FXSL'>    <xsl:param name='arg1' as='xs:string'/> <!--                                           -->    <xsl:sequence select='my:makeNum($arg1)'/>  </xsl:template> </xsl:stylesheet> 

when applied on the same XML document produces the same correct result:

13.68

The last solution is more flexible and can be used successfully when a more complex transformation of the values is needed before summing.