Ok! First goal achieved.
Thank you for your explanations, could suggest a log or message box to get through this. I used your standard metadata transfer with success except for language (however in zotero...).
Main concern now, if i show identifiers column i see some zkey_file, zkey, zmi attributes, is this information convenient in this field?
Anyway, next i had to modify content of "Link Attachements" from usual url to idlib:###...### to zotero_extra as the field "Link Attachements" is not imported by ZMI.
At this point i really believed ZMI might have done the job with #zotero_extra:identifiers but no way (#zotera_extra:#temp is working but is not very helpful). Just to clarify, next i have custom fields for isbn, sudoc, worldcat...
What can you suggest as a work arround?
Thanks!
Gilles
PS: Zotfile seems to be incompatible with current Zotero version.
https://addons.mozilla.org/fr/firefox/addon/zotfile/
error: L'extension "ZotFile" ne peut pas être installée. Elle est peut-être incompatible avec cette version de Zotero Standalone
Firefox: Ce module n'a pas pu être installé car il n'a pas pu être vérifié.