On Sat, May 17, 2025 at 04:05:19AM -0000, dvint@xxxxxxxxx scripsit:
> <request >

Quoting https://qt4cg.org/specifications/xpath-functions-40/Overview.html#json-to-xml-mapping

"fn:xml-to-json	Converts an XML tree, whose format corresponds to the
XML representation of JSON defined in this specification, into a string
conforming to the JSON grammar."

So even the newest version of xml-to-json needs the specific format of
XML as input.

Validation of your example against 
https://qt4cg.org/specifications/xpath-functions-40/schema-for-json.xsd
reports "Cannot find the declaration of element 'request'.

I don't think it's possible to use the standard functions to convert
your example. You'd have to write something that understood the XML
vocabulary you're using.

-- Graydon

--  
Graydon Saunders  | graydonish@xxxxxxxxxxxx
\xDE\xE6s ofer\xE9ode, \xF0isses sw\xE1 m\xE6g.
-- Deor  ("That passed, so may this.")