WSO2 EI and XSLT Mediator - xslt

Question

I have a SOAP call returning the following:
<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">
<soapenv:Body>
<ns:getTenantResponse xmlns:ns="http://services.mgt.tenant.carbon.wso2.org">
<ns:return xsi:type="ax2696:TenantInfoBean" xmlns:ax2696="http://beans.common.stratos.carbon.wso2.org/xsd" xmlns:ax2698="http://exception.common.stratos.carbon.wso2.org/xsd" xmlns:ax2700="http://api.user.carbon.wso2.org/xsd" xmlns:ax2702="http://beans.mgt.tenant.carbon.wso2.org/xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ax2696:active>true</ax2696:active>
<ax2696:admin>admin</ax2696:admin>
<ax2696:adminPassword xsi:nil="true"/>
<ax2696:createdDate>2020-03-31T18:05:30.321-03:00</ax2696:createdDate>
<ax2696:email>erico#mail.com</ax2696:email>
<ax2696:firstname>erico</ax2696:firstname>
<ax2696:lastname>mtx</ax2696:lastname>
<ax2696:originatedService xsi:nil="true"/>
<ax2696:successKey xsi:nil="true"/>
<ax2696:tenantDomain>dom20.com</ax2696:tenantDomain>
<ax2696:tenantId>1</ax2696:tenantId>
<ax2696:usagePlan/>
</ns:return>
</ns:getTenantResponse>
</soapenv:Body>
</soapenv:Envelope>
I need to treat the return through a XSLT Mediator in WSO2 Enterprise Integrator 6.6.0.
Some of the attributes return with the content:
xsi:nil="true"
I need the my mediator to replace these tags with empty values for my attributes.
My current Mediator is with following:
<?xml version="1.0"?>
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="1.0">
<xsl:output omit-xml-declaration="no" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="*[#xsi:nil = 'true']" />
</xsl:stylesheet>
The output is coming like this:
<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">
<soapenv:Body>
<ns:getTenantResponse xmlns:ns="http://services.mgt.tenant.carbon.wso2.org">
<ns:return xsi:type="ax2696:TenantInfoBean" xmlns:ax2696="http://beans.common.stratos.carbon.wso2.org/xsd" xmlns:ax2698="http://exception.common.stratos.carbon.wso2.org/xsd" xmlns:ax2700="http://api.user.carbon.wso2.org/xsd" xmlns:ax2702="http://beans.mgt.tenant.carbon.wso2.org/xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ax2696:active>true</ax2696:active>
<ax2696:admin>admin</ax2696:admin>
<ax2696:adminPassword xsi:nil="true"/>
<ax2696:createdDate>2020-03-31T18:05:30.321-03:00</ax2696:createdDate>
<ax2696:email>erico#skalena.com</ax2696:email>
<ax2696:firstname>erico</ax2696:firstname>
<ax2696:lastname>teixeira</ax2696:lastname>
<ax2696:originatedService xsi:nil="true"/>
<ax2696:successKey xsi:nil="true"/>
<ax2696:tenantDomain>dom20.com</ax2696:tenantDomain>
<ax2696:tenantId>1</ax2696:tenantId>
<ax2696:usagePlan/>
</ns:return>
</ns:getTenantResponse>
</soapenv:Body>
</soapenv:Envelope>
As example:
<ax2696:successKey xsi:nil="true"/>
I need it to become:
<ax2696:successKey></ax2696:successKey>
I need to do this for most of the attributes not only successKey
Thks

Answer 1

Your template matches any element that has a xsi:nil="true" attribute and removes it. If you want to remove only the attribute itself, make it:
<xsl:template match="#xsi:nil[. = 'true']" />

Answer 2

Updated answer
If you want to remove all #xsi:nil='true'
<xsl:template match="#xsi:nil"/>
If you want to remove #xsl:nil='true' only on certain nodes
<xsl:template match="#xsi:nil[local-name(parent::*) = 'originatedService']"/>
See an example here : https://xsltfiddle.liberty-development.net/pNmC4J4/1
Original answer
Not sure I really understand your question. Is this what you are trying to achieve?
Replace
<!-- TEMPLATE #2 -->
<xsl:template match="*[#xsi:nil = 'true']" />
By
<!-- TEMPLATE #2 -->
<xsl:template match="#xsi:nil[. = 'true']">
<xsl:attribute name="nil" namespace="http://www.w3.org/2001/XMLSchema-instance"/>
</xsl:template>
See it working here : https://xsltfiddle.liberty-development.net/pNmC4J4