If you are on a BizTalk , SAP project , Your XSLT skills can come real handy .
For e.g. here I needed to set a flag to true based on the existence of value in a node. Normally this is easy but in this case that node happens to be in a repeatable group node which can occur n number of times where n is unknown .
It would be a mapping nightmare or a custom Xml manipulation if not for XSLT
<xsl:for-each select="//*[local-name()='Receive' and namespace-uri()='http://Idoc/3/DEBMAS06//700/Receive']/*[local-name()='idocData' and namespace-uri()='http://Idoc/3/DEBMAS06//700/Receive']/*[local-name()='E2KNA1M005GRP' and namespace-uri()='http://Idoc/3/DEBMAS06//700']/*[local-name()='E2KNVVM007GRP' and namespace-uri()='http://Idoc/3/DEBMAS06//700']/*[local-name()='E2KNVPM002' and namespace-uri()='http://Idoc/3/DEBMAS06//700']/*[local-name()='PARVW' and namespace-uri()='http://Idoc/3/DEBMAS06//700']">
<xsl:variable name="nodeType"><xsl:value-of select="."/></xsl:variable>
<xsl:if test="$nodeType ='WE'">
<xsl:element name="shipToFlag">
Y
</xsl:element>
</xsl:if>
</xsl:for-each>
