Corese changes well-known prefixes in the response

[frmichel]

Issue Description:

Not really a bug, yet a surprising behavior that causes troubles in some cases.
Here is a query:

prefix dct: <http://purl.org/dc/terms/>
construct where { ?x dct:creator ?y } limit 1

Corese replies while changing dct into dc:

@prefix ns2: <https://openalex.org/> .
@prefix ns1: <http://data-issa.cirad.fr/document/> .
@prefix dc: <http://purl.org/dc/terms/> .
ns1:605209 dc:creator ns2:A5046185928 .

Also tested it with foaf.

Tested with Corse GUI 4.5.0, same behavior observed for Corese server.

Note to Developers:

I would expect Corese to reuse the prefix as it is given in the query. This is the case for namespaces that are probably unknown for Corese.
But it seems like whenever this is a well-known namespace, then Corese will use its preferred prefix rather than the one given in the query.