how to replace value using xpath3 expression in mule esb - mule

Question

<babyproducts>
<products>
<product1>
<productid>100</productid>
<productname>towel</productname>
<desc>towel</desc>
<discount>100</discount>
<validlity>10</validlity>
</product1>
<product2>
<productid>101</productid>
<productname>pillow</productname>
<desc>pillow</desc>
<discount>500</discount>
<validlity>5</validlity>
</product2>
</product>
</babyproducts>
I want to split above xml using xpath3 expression and replace the validlity value . after that i want whole set of above xml replaced values. I tried using xpath it is working fine. my requirement insists on doing using xpath3 mule expression
<splitter evaluator="xpath" expression="/babyproducts/products" doc:name="Splitter" />
<set-payload value="#[message.payload]" doc:name="Set Payload" />
<enricher source="#[flowVars.newvalidlity]" target="#[xpath('/products/validlity').text ]" doc:name="Message Enricher">
<logger level="INFO" message=" enricher done ~~~~~.." doc:name="Logger" />
</enricher>
above is my mule flow using xpath. my team wants to do using xpath3 (latest).
my expected outpu is like below with new validlity value 50 (comes from flow variable)
<babyproducts>
<products>
<product1>
<productid>100</productid>
<productname>towel</productname>
<desc>towel</desc>
<discount>100</discount>
<validlity>50</validlity>
</product1>
<product2>
<productid>101</productid>
<productname>pillow</productname>
<desc>pillow</desc>
<discount>500</discount>
<validlity>50</validlity>
</product2>
</product>
</babyproducts>

Answer 1

First of all your XML sample is invalid. There are unclosed tags and your xpath doesn't match the structure of the sample either.
Second of all I can only show the equivalent xpath3 expression of your xpath expression as I have already answered how to update an XML node in other questions of yours.
<splitter evaluator="xpath" expression="/babyproducts/products" doc:name="Splitter" />
Becomes:
<splitter expression="#[xpath3('/babyproducts/products/*', payload, 'NODESET')]"
doc:name="Splitter" />
And
#[xpath('/products/validlity').text]
Becomes:
#[xpath3('/products/validlity')]
No need for .text as by default returns the Stirng value. More info here: http://blogs.mulesoft.org/mule-3-6-xml-xpath-xslt-xquery3/