[Exist-open] Stored query submitting

[JP <jpl...@gm...>]

Hi all,

sorry for (bad english, bad question, bad use of this list, etc.)

I'm trying to submit request from Orbeon XForms : (  <xforms:submission
id="save-submission" method="post" replace="instance"
targetref="instance('stockage-local')/retour"
action="{fn:concat(instance('stockage-local')/request-path,'XQN03.xq')}"/> )

It seems ok, except the query ('XQN03.xq', see at this mail's end) doesn't
work as expected :
-return sounds ok
-eXist Query profiling says ok (0.5 sec)
-but ... data are not updated

The same request submitted from xQuery Sandbox works fine. Submitted from
eXist "browse collection" is like submitting from Orbeon.

Please, where am I wrong ?
Thanks,
JP

Here is that request (truncated, and parameters replaced here  with stored
data) :

let $identifiant := "N03_22Z"
let $chemin :=
doc("http://localhost:8080/exist/rest/db/Rmes/Donnees/NAF2008.xml")
let $modif :=
<rm:Poste isVersionable="true" version="2.0.0" versionDate="2009-01-11"
id="N03_22Z" urn="urn:ddi:fr.insee:Poste.N03_22Z.2.0.0"><ddi:UserID
type="Nom">F M</ddi:UserID>
<Titre Longueur="500" xml:lang="fr">Aquaculture en eau douce</Titre>
<NoteGenerale xml:lang="fr"/>
<PseudoCode>true</PseudoCode>
<Contenu xml:lang="fr">- l'aquaculture en eau douce etc. </Contenu>
<Exclu xml:lang="fr">- l'aquaculture dans des citernes ou des réservoirs
remplis d'eau salée etc. )</Exclu>
</rm:Poste>

for $noeud in $chemin
return
<retour>
<identifiant>{$identifiant}</identifiant>
<chemin>{$chemin/rm:FamilleDeNomenclatures/Nomenclature//rm:Poste[@id=$identifiant]}</chemin>
<modif>{$modif}</modif>
<result>
{update replace
/rm:FamilleDeNomenclatures/Nomenclature//rm:Poste[@id=$identifiant] with
$modif}
</result>
</retour>