User-defined System Properties
User-defined system properties provide a centralized way to control the behaviour of objects created by the user. They are:
- Key-value based;
 - Available for all the users inside a single virtual database (VDB);
 - Stored per VDB, not available from other VDBs;
 - Exportable via "Export Wizard";
 - Importable by import script;
 - Readable by all users within a VDB, editable and deletable only by creator or administrator.
 
System properties are stored in the SYSADMIN.SystemProperties table and managed via User-defined System Properties Management procedures.
System properties history is stored in the SYSLOG.SystemPropertiesHistory table.