How to transform based on element content?

[eslaydon]

I'm hoping that someone can help me figure out how to test the content of an XML element. I know how to do it if it is an attribute of the element but how do I get at the actual content?

For example I have the following snippet of xml:

<classContent>
<class>English</class>
<number>two</number>
</classContent>

I have the XSL outputing the class of English but I want to know how to get the XSL to do a transform on "two". In other words I want the XSL to do a test that says - if the element "number" content is equal to "two" then output "2". I have multiple values of the element "number" that I would want it to go through and replace. Is this possible with XML and XSL??

thanks

[jkmyoung]

Yes this is, but you would need to have a listing of all possible values in your xsl. eg:

<my:mapping xmlns:my="internal">
<number text="zero" value="0"/>
<number text="one" value="1"/>
<number text="two" value="2"/>
<number text="three" value="3"/>
<number text="four" value="4"/>
<number text="five" value="5"/>
<number text="six" value="6"/>
<number text="seven" value="7"/>
<number text="eight" value="8"/>
<number text="nine" value="9"/>
</my:mapping>

When you get to the number node:
<xsl:template match="number">
<xsl:copy>
<xsl:value-of select="document('')//number[@text = current()]/@value"/>
</xsl:copy>
</xsl:template>

[Mustermeister]

You could use if-statements like the following:

<xsl:if test="number='two'">2</xsl:if>

or you can use a choose statement:

<xsl.choose>
<xsl:when test="number='one'">1</xsl:when>
<xsl:when test="number='two'">2</xsl:when>
</xsl:choose>

or you can use multiple templates like this:

<xsl:template match="number[string()='two']">2</xsl:template>

or you can follow the advice above and create a mapping element, but it should be put in its own xml document like this:

<?xml version="1.0" encoding="ISO-8859-1"?>

<mapping>
<number text="zero" value="0"/>
<number text="one" value="1"/>
<number text="two" value="2"/>
<number text="three" value="3"/>
<number text="four" value="4"/>
<number text="five" value="5"/>
<number text="six" value="6"/>
<number text="seven" value="7"/>
<number text="eight" value="8"/>
<number text="nine" value="9"/>
</mapping>

If the file name is mapping.xml we compute the mapping like this:

<xsl:template match="number">
<xsl:value-of select="document('mapping.xml')/mapping/number[@text = current()]/@value"/>
</xsl:template>

Opera doesn't support the document() function however.

[Mustermeister]

In XPath 2.0, hence in XSLT 2.0 sequence functions will become available. Then we can solve the problem like this:

<xsl:template match="number">
<xsl:value-of select="index-of(('one','two','three'),.)"/>
</xsl:template>

In the meantime there is a string solution:

<xsl:variable name="mapping">one1one,two2two,three3three</xsl:variable>

<xsl:template match="number">
<xsl:value-of select="substring-before(substring-after($mapping,.),.)"/>
</xsl:template>