Does XPATH of xml-filter support XPATH 2.0?

Does XPATH of xml-filter support XPATH 2.0?

I am using, a XPATH with for condition and it is not working

 xpath => [
"for $r in //row return string-join($r//testing//value, ',')","Testing"
]

this XPATH doesnt work, but it is working well in other programming language

Hi

Does anyone know about this, please let me know.
Thanks