[itsm] Where do stand ConfigItem attributes in the DB ?

Hi, I am wondering where do stand the Software ConfigItem attributes like 'Serial Number', 'LicenseKey', ... in the OTRS/ITSM DB. You can see these attributes when performing a search over existing software items (Ticket >> Details >> Link >> Add >> Target Object = ConfigItem::Software) but where are they in the DB ???? I only see the name and state of an item in the [configitem] and [configitem_version] tables. Thanks in advance for helping ! Gaël