On Sun, Jan 30, 2022 at 11:48 PM Hans-Juergen Rennau <hrennau@yahoo.de> wrote:
>
> Thank you, Christian, now I understand!
>
> Incidentally, nevertheless I am not sure the following behaviour is correct:
>
> basex "<_ xmlns='bar'>{element foo {namespace {''} {'bar'}}}</_>/*"
> =>
> [XQDY0102] Duplicate namespace declaration: ''.
>
> As the dynamic constructor is located in a static context with a default namespace, the foo should be interpreted as a name in that namespace, thus "if the name of an element in an element constructor is in no namespace" does not apply.
>
> Cordial greetings,
> Hans-Jürgen
>
> PS: By contrast, this works:
> basex "<_ xmlns='bar'>{<foo/>}</_>/*"
> =>
> <foo xmlns="bar"/>
>
> PPS: And this also works:
> basex "<_ xmlns:f='bar'>{element f:foo {namespace {'f'} {'bar'}}}</_>/*"
> =>
> <f:foo xmlns:f="bar"/>
>
>
>
>
> Am Sonntag, 30. Januar 2022, 17:54:24 MEZ hat Christian Grün <christian.gruen@gmail.com> Folgendes geschrieben:
>
>
> Hi Hans-Jürgen,
>
> > basex "<foo>{namespace {''}{'bar'}}</foo>"
> > =>
> > [XQDY0102] Duplicate namespace declaration: ''.
>
> This is expected. The specification states that “[…] if the name of an
> element in an element constructor is in no namespace, creating a
> default namespace for that element using a computed namespace
> constructor is an error [err:XQDY0102]”
>
> You’ll need to include a (static) namespace URI as part of the direct
> element constructor:
>
> <foo xmlns='bar'/>
>
> Best,
> Christian
>
>
> [1]
> https://www.w3.org/TR/xquery-31/#id-ns-nodes-on-elements
>