Hi Hans-Jürgen,

It feels a bit clumsy, but adding a prefixed attribute and removing it again should do the job:

  let $xml := doc('x.xml')
  let $updated := $xml update {
    insert node <a xmlns:prefix='URI' prefix:attr=''/>/@* into *
  } update {
    delete node */@attr
  }
  return ($updated, base-uri($updated))

Best,
Christian

Von: Hans-Juergen Rennau <hrennau@yahoo.de>
Gesendet: Montag, 4. August 2025 13:09
An: BaseX <basex-talk@mailman.uni-konstanz.de>; Christian Grün <cg@basex.org>
Betreff: Re: AW: [basex-talk] Add namespace bindings via copy/modify/return
 
Thank you, Christian! The problem is that this way I lose the base URI! The only way how to retain it which I am aware of would be the insertion of @xml:base, but this amounts to a change of the document I may not be authorized to do by the context. 

Is there any way how to change a document (as modified copy, not via copy/modify/return) and retain or control the base URI of the result, without inserting @xml:base?

Kind regards,
Hans-Jürgen

Am Montag, 4. August 2025 um 12:49:50 MESZ hat Christian Grün <cg@basex.org> Folgendes geschrieben:


Hi Hans-Jürgen,

The insertion of namespace nodes has not been defined in the XQuery Update spec. You may need choose the classic element constructor for that:

let $doc := <doc><a/></doc>
return element { node-name($doc) } {
  $doc/@*,
  namespace xyz { 'https://basex.org/ns' },
  $doc/node()
}

Hope this helps,
Christian
Von: Hans-Juergen Rennau via BaseX-Talk <basex-talk@mailman.uni-konstanz.de>
Gesendet: Samstag, 2. August 2025 15:51
An: BaseX <basex-talk@mailman.uni-konstanz.de>
Betreff: [basex-talk] Add namespace bindings via copy/modify/return
 
Dear BaseX people,

I cannot use copy/modify/return in order to add a namespacing:

let $doc := <doc><a/></doc>
return
    copy $doc_ := $doc
    modify
      insert node namespace xyz {'https://basex.org/ns'} into $doc_
    return $doc_

=>
<doc>
  <a/>
</doc>

Is this a bug?

Kind regards,
Hans-Jürgen