$impl_dir = ($this->bdd("sgbd") == "xml" ? "xml" : "sql")."/";
$versions_dir = $this->path("mw_dir")."app/data/upgrades/".$impl_dir;
if(is_dir($versions_dir)){
$impl_dir = ($this->bdd("sgbd") == "xml" ? "xml" : "sql")."/";
$versions_dir = $this->path("mw_dir")."app/data/upgrades/".$impl_dir;
if(is_dir($versions_dir)){