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Old September 14th, 2005, 04:31 AM
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Default Nested XML to CSV transformation

Hi All,
Apologies for yet another XML to CSV post - I see there are a lot of similar topics already but I havent seen any that would quite cover what I need to do.

This is a simplified snippet of my XML:
<REPORT>
    <COLUMNS>
        <COL_NAME name='Name'/>
        <COL_OFFER_PRICE name='Offer'/>
        <COL_CODE name='Code'/>
        <COL_BID_PRICE name='Bid Price'/>
    </COLUMNS>
    <DATA_ROW>
        <COL_NAME>Growth Fund</COL_NAME>
        <COL_OFFER_PRICE nested='True'>
            <PRICE itemDate='2001-01-01'>1.00</PRICE>
            <PRICE itemDate='2001-01-02'>1.01</PRICE>
            <PRICE itemDate='2001-01-03'>1.04</PRICE>
            ...........................
        </COL_OFFER_PRICE>
        <COL_CODE>12321</COL_CODE>
        <COL_BID_PRICE nested='True'>
            <PRICE itemDate='2001-01-01'>1.01</PRICE>
            <PRICE itemDate='2001-01-02'>1.02</PRICE>
            <PRICE itemDate='2001-01-03'>1.09</PRICE>
            ...........................
        </COL_BID_PRICE>
    </DATA_ROW>
    <DATA_ROW>
        ...........................
    </DATA_ROW>
</REPORT>

It represents a report, each <COLUMNS> item is a column heading & each <DATA_ROW> item is a row of data. There may be one or many <DATA_ROW> items.

Each <DATA_ROW> represents a row of data about a fund in this context.
Items within the <DATA_ROW> may be 'static data' which is not date sensitive such as 'fund name' or they may have a 'nested' attribute which means that they have sub-rows of data.

I need to transform the XML into a CSV file like:

Name, Offer, Code, Bid
Growth Fund, 1.00, 12321, 1.01
Growth Fund, 1.01, 12321, 1.02
Growth Fund, 1.04, 12321, 1.09

So for each nested item within a data row, I need to repeat the 'static' data for all of its children.
All nested items within a <DATA_ROW> will have the same amount of children.

Confused? I am...
Any help/guidance at all gratefully accepted.

Regards,
Patrick.


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Old September 16th, 2005, 03:52 PM
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Default

Here!

Try it with a complete exemple. Hope it helps!

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="text"/>
    <xsl:template match="/">
        <xsl:apply-templates select="//COLUMNS"></xsl:apply-templates>
        <xsl:apply-templates select="//DATA_ROW"></xsl:apply-templates>
    </xsl:template>
    <xsl:template match="COLUMNS">
        <xsl:for-each select="child::node()">
            <xsl:value-of select="@name"/>
            <xsl:if test="position()!=last()">
                <xsl:text>,</xsl:text>
            </xsl:if>
            <xsl:if test="position()=last()">
                <xsl:text>#x0d;#x0a;</xsl:text>
            </xsl:if>
        </xsl:for-each>
    </xsl:template>
    <xsl:template match="DATA_ROW">
        <xsl:variable name="nbNested" select="count(./COL_OFFER_PRICE//PRICE)"/>
        <xsl:call-template name="addRow">
            <xsl:with-param name="curPos" select="1"/>
            <xsl:with-param name="maxPos" select="$nbNested"/>
        </xsl:call-template>
    </xsl:template>
    <xsl:template name="addRow">
        <xsl:param name="curPos"/>
        <xsl:param name="maxPos"/>
        <xsl:if test="$maxPos >= $curPos">
            <xsl:value-of select="COL_NAME"/>
            <xsl:text>,</xsl:text>
            <xsl:value-of select="./COL_OFFER_PRICE/PRICE[$curPos]"/>
            <xsl:text>,</xsl:text>
            <xsl:value-of select="./COL_CODE"/>
            <xsl:text>,</xsl:text>
            <xsl:value-of select="./COL_BID_PRICE/PRICE[$curPos]"/>
            <xsl:text>#x0d;#x0a;</xsl:text>
            <xsl:call-template name="addRow">
                <xsl:with-param name="curPos" select="$curPos + 1"/>
                <xsl:with-param name="maxPos" select="$maxPos"/>
            </xsl:call-template>
        </xsl:if>
    </xsl:template>
</xsl:stylesheet>

Rushman

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Old September 19th, 2005, 03:11 AM
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Excellent - that will keep me busy for a while.

Thanks Rushman!

-Patrick.

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