The Source is a nested XML

When the Source (FROM) is a nested XML object, you can use an XSLT to transform it to any desired Format.

Let's assume that you are receiving a source XML from a web service and loading it into a database. Similarly, let's assume that your source XML is a nested data object, like the one below:

<?xml version="1.0" encoding="UTF-8"?>
<GoodsReceivedIntoBond>
     <GoodsReceivedIntoBondHeader WarehouseNo="CTN 12" CustomerCode="Cust1" 
     DocumentNo="00123" DocumentDate="2017-02-08" NumberOfLine="3" DocumentXRef="12345">
          <GoodsReceivedIntoBondLines>
               <StockCode>B3B4</StockCode>
               <StockQuantity>60.0000</StockQuantity>
          </GoodsReceivedIntoBondLines>
          <GoodsReceivedIntoBondLines>
               <StockCode>B5GT</StockCode>
               <StockQuantity>60.0000</StockQuantity>
          </GoodsReceivedIntoBondLines>
          <GoodsReceivedIntoBondLines>
               <StockCode>B121W</StockCode>
               <StockQuantity>360.0000</StockQuantity>
          </GoodsReceivedIntoBondLines>
     </GoodsReceivedIntoBondHeader>
     <GoodsReceivedIntoBondHeader WarehouseNo="CTN 13" CustomerCode="Cust2" 
     DocumentNo="00456" DocumentDate="2017-02-08" NumberOfLine="2" DocumentXRef="6789">
          <GoodsReceivedIntoBondLines>
               <StockCode>B7C7</StockCode>
               <StockQuantity>16.0000</StockQuantity>
          </GoodsReceivedIntoBondLines>
          <GoodsReceivedIntoBondLines>
               <StockCode>B12345</StockCode>
               <StockQuantity>16.0000</StockQuantity>
          </GoodsReceivedIntoBondLines>
     </GoodsReceivedIntoBondHeader>
</GoodsReceivedIntoBond>

Most databases store data in flat tables with rows and columns. So, ideally, you would like to denormalize a nested data object, like the one above, and transform it into a flat table:

In the Etlworks Integrator, all you need to do to accomplish this is to use an XML Format together with an XSL stylesheet.

Step 1. Create an XSL stylesheet which transforms a nested-source XML, like the one above, into a denormalized flat XML, like what is shown below:

<?xml version="1.0" encoding="UTF-8"?>
<result>
    <ROW>
       <WarehouseNo>WN</WarehouseNo> 
       <CustomerCode>CC</CustomerCode> 
       <DocumentNo>DN</DocumentNo>
       <DocumentDate>DD</DocumentDate> 
       <NumberOfLine>NOL</NumberOfLine> 
       <DocumentXRef>XREF</DocumentXRef>
       <StockCode>SC</StockCode>
       <StockQuantity>SQ</StockQuantity>
    </ROW>
    <ROW>
       .....
    </ROW> 
</result>

For this solution, we will be using the following XSL stylesheet:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs">
    <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
    <xsl:template match="/">
        <xsl:variable name="var1_initial" select="."/>
        <result>
            <xsl:for-each select="GoodsReceivedIntoBond/GoodsReceivedIntoBondHeader">
                <xsl:variable name="var2_cur" select="."/>
                <xsl:for-each select="GoodsReceivedIntoBondLines">
                    <xsl:variable name="var3_cur" select="."/>
                    <ROW>
                        <WarehouseNo>
                            <xsl:value-of select="$var2_cur/@WarehouseNo"/>
                        </WarehouseNo>
                        <CustomerCode>
                            <xsl:value-of select="$var2_cur/@CustomerCode"/>
                        </CustomerCode>
                        <DocumentNo>
                            <xsl:value-of select="number($var2_cur/@DocumentNo)"/>
                        </DocumentNo>
                        <DocumentDate>
                            <xsl:value-of select="$var2_cur/@DocumentDate"/>
                        </DocumentDate>
                        <NumberOfLine>
                            <xsl:value-of select="number($var2_cur/@NumberOfLine)"/>
                        </NumberOfLine>
                        <DocumentXRef>
                            <xsl:value-of select="number($var2_cur/@DocumentXRef)"/>
                        </DocumentXRef>
                        <StockCode>
                            <xsl:value-of select="StockCode"/>
                        </StockCode>
                        <StockQuantity>
                            <xsl:value-of select="number(StockQuantity)"/>
                        </StockQuantity>
                    </ROW>
                </xsl:for-each>
            </xsl:for-each>
        </result>
    </xsl:template>
</xsl:stylesheet>

Note the <ROW>...</ROW> tag in the stylesheet.

Step 2. Create an XML Format in the Etlworks Integrator, which uses the XSL stylesheet above.

Row Tag: ROW, in our case.
XPath Query or XSL Style Sheet or Preprocessor: XSL stylesheet above, in our case.

Step 3. Create source-to-destination Flow and use the Format created in Step 2 as your source (FROM) Format.

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