Ok thanks. I thought this might have been unintended behavior.

if($report?result instance of document-node()+) then document{$report?result} else $report?result

seems to give me what I expected here.

/Andy

On Wed, 4 May 2022 at 16:58, Christian Grün <christian.gruen@gmail.com> wrote:

Thanks, Andy, I’ve updated the documentation.

On Wed, May 4, 2022 at 3:12 PM Andy Bunce <bunce.andy@gmail.com> wrote:

Hi,

Using BaseX 9.7.1 and saxon9he-9.9.1.jar

The documentation suggests the ?result from xslt:transform-report should be a document-node where possible [1]

This seems not quite to be the case when there are processing instructions or comments at the top level. In these cases a sequence of document-nodes is returned.

/Andy

[1] https://docs.basex.org/wiki/XSLT_Module#xslt:transform-report

let $xslt:=<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="3.0">
    <xsl:mode on-no-match="shallow-copy"/>
</xsl:stylesheet>

let $xml:=document{ <?something type="compact"?>, <foo/>}
return xslt:transform-report($xml,$xslt)

Returns

map {
  "messages": (),
  "result": (<?something type="compact"?>, <foo/>)
}