[xsl] How to unescape slash character using xml-to-json ?

Hi all,

I need to generate this json output :

{"test":"foo/bar"}

I use XSLT3 function fn:xml-to-json to do this.
My input is :

<fn:map xmlns:fn="http://www.w3.org/2005/xpath-functions";>
    <fn:string key="test" escaped="false">foo/bar</fn:string>
</fn:map>

But I always get this result with escaped slash :

{"test":"foo\/bar"}

Reading the spec at https://www.w3.org/TR/xslt-30/#func-xml-to-json at 
paragraph "Strings are escaped as follows:" it looks like I can't unescape "/" 
(solidus?) character.

Is there really no way to do that using XSLT3  json functionality ? Did I 
missed something obvious ?

Here is a running test : https://xsltfiddle.liberty-development.net/bwdwrV

Thanks in advance,

Cordialement,
[cid:image002.jpg@01D58A06.3B895330]Matthieu RICAUD-DUSSARGET
Expert XML
SI EDITORIAL
Tél. +33 6 63 25 95 58
80, avenue de la Marne 92120 Montrouge
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