XML Transformation

pjfogarty · 20-06-2006 04:32PM #1

Hi,

I am performing an xml transformation,from xml to xml.My problem is that the tags that are discarded from the input appear to show up as whitespace in the output.I am using http://javaalmanac.com/egs/javax.xml.transform/BasicXsl.html

to perform the transformation and my xslt stylesheet is

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" encoding="iso-8859-1" indent="yes"/>
<xsl:template match="top">
<top>
<xsl:apply-templates select="model"/>
</top>
</xsl:template>
<xsl:template match="model">
<model>
<xsl:apply-templates select="instance"/>
</model>
</xsl:template>
<xsl:template match="instance">
<MO Type="{@type}" Name="{@name}">
<xsl:apply-templates select="attribute"/>
<xsl:apply-templates select="instance"/>
</MO>
</xsl:template>
<xsl:template match="attribute">
<xsl:element name="{@name}">
<xsl:value-of select="normalize-space(name)"/>
<xsl:apply-templates select="datatype"/>
</xsl:element>
</xsl:template>
<xsl:template match="datatype/enumRef">
<xsl:element name="{@name}">
<xsl:apply-templates select="value"/>
</xsl:element>
</xsl:template>
<xsl:template match="value">
<xsl:value-of select="normalize-space(.)"/>
</xsl:template>
<xsl:template match="datatype/struct">
<xsl:element name="{@name}">
<xsl:apply-templates select="structMember"/>
</xsl:element>
</xsl:template>
<xsl:template match="structMember">
<xsl:element name="{@name}">
<xsl:apply-templates/>
</xsl:element>
</xsl:template>
</xsl:stylesheet>

Thanks

Torak · 20-06-2006 06:32PM

<xsl:stylesheet>

.....
....

<xsl:template match="text()"/>

</xsl:stylesheet>

basically this tells it to ignore text nodes that are encountered!

pjfogarty · 21-06-2006 11:54AM

I think my problem is misunderstood.
Here is some sample output.

<O Name="10479" Type="barry">
<Id>

10479

</Id>
<userLabel>

10479

</userLabel>
<sac>

10479

</sac>
</O>

I want to get rid of the blank lines between the tags and the values

Torak · 21-06-2006 01:01PM

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    
    <xsl:output method="xml" encoding="iso-8859-1" indent="yes" />
    
    <xsl:strip-space elements="*"/>
    
    <xsl:template match="top">
        <top>
            <xsl:apply-templates select="model"/>
        </top>
    </xsl:template>
    
    <xsl:template match="model">
        <model>
            <xsl:apply-templates select="instance"/>
        </model>
    </xsl:template>
    
    <xsl:template match="instance">
        <MO Type="{@type}" Name="{@name}">
            <xsl:apply-templates select="attribute"/>
            <xsl:apply-templates select="instance"/>
        </MO>
    </xsl:template>
    
    <xsl:template match="attribute">
        <xsl:element name="{@name}">
            <xsl:value-of select="normalize-space(name)"/>
            <xsl:apply-templates select="datatype"/><!-- rules for other children -->
        </xsl:element>
    </xsl:template>
    
    <xsl:template match="datatype/enumRef">
        <xsl:element name="{@name}">
            <xsl:apply-templates select="value"/><!-- rules for other children -->
        </xsl:element>
    </xsl:template>
    
    <xsl:template match="value"><!--<xsl:apply-templates select = "enumRef"/>-->
        <xsl:value-of select="normalize-space(.)"/>
    </xsl:template>
    
    <xsl:template match="datatype/struct">
        <xsl:element name="{@name}">
            <xsl:apply-templates select="structMember"/><!-- rules for other children -->
        </xsl:element>
    </xsl:template>
    
    <xsl:template match="structMember">
        <xsl:element name="{@name}">
            <xsl:apply-templates/><!-- rules for other children -->
        </xsl:element>
    </xsl:template>
</xsl:stylesheet>

The important things to note are:

1) It is formatted.
2) <xsl:strip-space elements="*"/>

pjfogarty · 21-06-2006 02:56PM

tags that had values which were empty as

<attribute name = id>
<value>

</value>
</attribute>

would usually return <id> </id> ,but now shows up as <id/>

Torak · 21-06-2006 04:29PM

that's valid and correct xml...

why is it a problem?

pjfogarty · 22-06-2006 11:20AM

Its a problem because i need to keep empty tags so that they can be modified,as an empty tag is a valid tag.As tags can contain null values or empty strings.

Torak · 22-06-2006 01:56PM

pjfogarty wrote:

Its a problem because i need to keep empty tags so that they can be modified,as an empty tag is a valid tag.As tags can contain null values or empty strings.

how are you modifying it though?

Are you using text manipulation or an xml parser?

To an xml parser both should appear the same! If they are not then you need to get a new parser!

I can only help if you give enough information tbh.

If you run an xml file with <id/> and another with <id></id> through a SaxParser the values passed to the startElement method will be the same and nothing will be passed to the characters method implying that there is no content.

If you are manipulating the text then all bets are off..

XML Transformation

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