Getting parent element in XSLT

Question

I have an XML like this:

<PurchaseOrder>
    <ID>1</ID>
    <PurchaseOrderLine>
        <DATA>100<DATA>
    </PurchaseOrderLine>
    <PurchaseOrderLine>
        <DATA>200<DATA>
    </PurchaseOrderLine>
    <PurchaseOrderLine>
        <DATA>300<DATA>
    </PurchaseOrderLine>
</PurchaseOrder>
<PurchaseOrder>
    <ID>2</ID>
    <PurchaseOrderLine>
        <DATA>100<DATA>
    </PurchaseOrderLine>
    <PurchaseOrderLine>
        <DATA>200<DATA>
    </PurchaseOrderLine>
    <PurchaseOrderLine>
        <DATA>300<DATA>
    </PurchaseOrderLine>
</PurchaseOrder>
<PurchaseOrder>
    <ID>3</ID>
    <PurchaseOrderLine>
        <DATA>100<DATA>
    </PurchaseOrderLine>
    <PurchaseOrderLine>
        <DATA>200<DATA>
    </PurchaseOrderLine>
    <PurchaseOrderLine>
        <DATA>300<DATA>
    </PurchaseOrderLine>
</PurchaseOrder>

and XSL:

<xsl:template match="PurchaseOrder">
    <xsl:apply-templates select="PurchaseOrderLine"/>
</xsl:template>

<xsl:template match="PurchaseOrderLine">
    <!-- I want to get the PurchaseOrder\ID here for the current PurchaseOrder -->
</xsl:template>

How can I get current parent element value (PurchaseOrder\ID) in PurchaseOrderLine?

rainabba · Accepted Answer · 2014-02-03 22:24:21Z

11

If you want your templates to be atomic (isolated and reusable), you should be referencing a parent node this way. Instead, when calling the template, pass in the reference you want to be able to use. This way you could use this template for the same type of node, even if it has a different context/parent (so long as you can still load the parameter).

<xsl:template match="PurchaseOrder">
    <xsl:apply-templates select="PurchaseOrderLine">
        <xsl:with-param name="PurchaseOrder" select="."/>
    </xsl:apply-templates>
</xsl:template>

<xsl:template match="PurchaseOrderLine">
    <xsl:param name="PurchaseOrder"/>
    <!-- I want to get the PurchaseOrder\ID here for the current PurchaseOrder -->
</xsl:template>

Now in your PurchaseOrderLine template, you can reference the $PurchaseOrder variable.

answered Feb 3, 2014 at 22:24

rainabba

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Tomalak · Accepted Answer · 2012-10-02 07:21:25Z

5

Seems like you have skipped some basic reading on XPath.

<xsl:template match="PurchaseOrderLine">
    <xsl:value-of select="../ID" />
</xsl:template>

answered Oct 2, 2012 at 7:21

Tomalak

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Comments

Joates · Accepted Answer · 2019-01-09 05:47:14Z

0

Not sure if this is where you are going but you can match the Parent node by doing the following, this checks if the parent node has the Child node.

<xsl:template match="//*[PurchaseOrderLine]>
    <!--- Do you stuff here with parent context--->
</xsl:template>

With this you can do several things, you can select a PurchaseOrderLine with an ID and Data value.

<xsl:template match="//PurchaseOrder[ID=3 and PurchaseOrderLine/DATA=100]">
     <!--- Do stuff with parent that has the ID of 3 And the DATA of 200 --->
</xsl:template>

edited Jan 9, 2019 at 5:47

answered Jan 9, 2019 at 5:40

Joates

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