Change value in specific attribute using XSLT
I am trying to write my first XSLT. It needs to find all elements bind
where the attribute ref
starts with "$ .root" and then ".newRoot" is inserted. I was able to match a specific attribute, but I don't understand how I can get it to print the updated attribute value.
XML input example:
<?xml version="1.0" encoding="utf-8" ?>
<top>
<products>
<product>
<bind ref="$.root.other0"/>
</product>
<product>
<bind ref="$.other1"/>
</product>
<product>
<bind ref="$.other2"/>
</product>
<product>
<bind ref="$.root.other3"/>
</product>
</products>
</top>
My XSL so far:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="bind[starts-with(@ref,'$.root')]/@ref">
<xsl:attribute name="ref">$.newRoot<xsl:value-of select="bind/@ref" /></xsl:attribute>
</xsl:template>
</xsl:stylesheet>
XML I would like to create from input:
<?xml version="1.0" encoding="utf-8" ?>
<top>
<products>
<product>
<bind ref="$.newRoot.root.other0"/>
</product>
<product>
<bind ref="$.other1"/>
</product>
<product>
<bind ref="$.other2"/>
</product>
<product>
<bind ref="$.newRoot.root.other3"/>
</product>
</products>
</top>
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Instead:
<xsl:template match="bind[starts-with(@ref,'$.root')]/@ref">
<xsl:attribute name="ref">$.newRoot<xsl:value-of select="bind/@ref" /></xsl:attribute>
</xsl:template>
try:
<xsl:template match="bind[starts-with(@ref,'$.root')]/@ref">
<xsl:attribute name="ref">$.newRoot.root<xsl:value-of select="substring-after(., '$.root')" /></xsl:attribute>
</xsl:template>
or (the same in more convenient syntax):
<xsl:template match="bind/@ref[starts-with(., '$.root')]">
<xsl:attribute name="ref">
<xsl:text>$.newRoot.root</xsl:text>
<xsl:value-of select="substring-after(., '$.root')" />
</xsl:attribute>
</xsl:template>
Note the usage .
to refer to the current node. In your version, the command <xsl:value-of select="bind/@ref" />
doesn't select anything because the attribute is ref
already the current node - and it has no children.
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