Alex (archive)
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I'm new to xslt, and I am attempting to use it to produce a comma-separated-value file from a large, dynamically-generated data file formatted in xml (examples of the xml file and my xslt style sheet follow). It works pretty well, but xsltproc takes an extremely long time to process the data file when it grows fairly large (>1MB). I've read that using keys can improve processing time on large documents, however I don't know the number of key tables required or which nodes should be placed in the key table until the document must be processed. I realize that I can use a second "preprocessor" xslt style sheet to dynamically create the appropriate keys within my own style sheet, but this approach seems cumbersome and I would prefer to create the keys dynamically within a single sheet.
Is this possible in xslt, or is this application beyond the scope of what xslt is designed to do?
Any help greatly appreciated!
- Alex
....
The data file is formatted as follows:
<system version="1.0">
<property_1>
<name>future</name>
<binned_data type="step">
<value ts="0">3.045139</value>
<value ts="1">3.048611</value>
<value ts="2">3.052083</value>...
</binned_data>
</property_1>
<property_2></property_2>...
<system>
I'm using the following xslt style sheet to produce the csv output
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl
utput method="text"/> <xsl:variable name="newline"> <xsl:text> </xsl:text> </xsl:variable>
<xsl:template match="/">
<!-- Template for CSV values -->
<xsl:apply-template
select="self::node/descendant::binned_data[@type='step'][1]" /> </xsl:template> <xsl:template match="binned_data"> <xsl:for-each select="value"> <xsl:variable name ="i" select="position" /> <xsl:for-each select="//binned_data[@type='step']"> <xsl:value-of select="value[$i]"/><xsl:text>, </xsl:text>--> </xsl:for-each> <xsl:value-of select="$newline"/> </xsl:for-each>--> </xsl:template>
<!-- suppress everything else -->
<xsl:template match="*"></xsl:template>
</xsl:stylesheet>
Is this possible in xslt, or is this application beyond the scope of what xslt is designed to do?
Any help greatly appreciated!
- Alex
....
The data file is formatted as follows:
<system version="1.0">
<property_1>
<name>future</name>
<binned_data type="step">
<value ts="0">3.045139</value>
<value ts="1">3.048611</value>
<value ts="2">3.052083</value>...
</binned_data>
</property_1>
<property_2></property_2>...
<system>
I'm using the following xslt style sheet to produce the csv output
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl
utput method="text"/> <xsl:variable name="newline"> <xsl:text> </xsl:text> </xsl:variable><xsl:template match="/">
<!-- Template for CSV values -->
<xsl:apply-template
select="self::node/descendant::binned_data[@type='step'][1]" /> </xsl:template> <xsl:template match="binned_data"> <xsl:for-each select="value"> <xsl:variable name ="i" select="position" /> <xsl:for-each select="//binned_data[@type='step']"> <xsl:value-of select="value[$i]"/><xsl:text>, </xsl:text>--> </xsl:for-each> <xsl:value-of select="$newline"/> </xsl:for-each>--> </xsl:template>
<!-- suppress everything else -->
<xsl:template match="*"></xsl:template>
</xsl:stylesheet>