From Forum Nokia Wiki

All landmarks and categories are stored in databases, which may be local or remote. The primary identifier of the database is URI. The URI consists of a protocol specifier and the database location: "protocol://location".

For the local database:

• protocol is "file".
• location consists of disk drive and file name (with extension *.ldb)

Example of the local database URI: "file://C:my_data.ldb"

You can use Landmarks Database Management API for the database management. The main class of this API is CPosLmDatabaseManager. (include epos_cposlmdatabasemanager.h, link against eposlmdbmanlib.lib)

A couple of small examples:

The following code snippet demonstrates how to rename default landmark database:

_LIT( KNewName, "New Database Name" );
const TInt KMaxDbNameLen = 64;
TBuf<KMaxDbNameLen> newName( KNewName );
 
// Main DB Manager;
CPosLmDatabaseManager* dbManager = CPosLmDatabaseManager :: NewL();
CleanupStack :: PushL( dbManager );
 
// Get default db URI
HBufC* defaultUri = dbManager->DefaultDatabaseUriLC();
if( defaultUri )
{
   // Get db info by URI
   HPosLmDatabaseInfo* dbInfo = HPosLmDatabaseInfo :: NewLC( *defaultUri );
   dbManager->GetDatabaseInfoL( *dbInfo );
 
   // Get settings from info
   TPosLmDatabaseSettings& settings = dbInfo->Settings();                    
 
   // Set new name and save settings
   settings.SetDatabaseName( newName );
   dbManager->ModifyDatabaseSettingsL( *defaultUri, settings );		   		   
 
   CleanupStack :: PopAndDestroy( 2 ); // dbInfo defaultUri
}		   
CleanupStack :: PopAndDestroy( 1 ); // dbManager

The following code snippet demonstrates how to copy all local databases from one drive to another:

// db manager;
CPosLmDatabaseManager* dbManager = CPosLmDatabaseManager :: NewL();
CleanupStack :: PushL( dbManager );
 
// protocol for the local DB
_LIT( KFileProto, "file" );
 
// array, that contains URI of the local DBs
CDesCArray* dbUriList = dbManager->ListDatabasesLC( KFileProto );
 
const TInt KMaxUriLen = 128;
TBuf<KMaxUriLen> uri, newUri;
 
TChar driveFrom = 'C',
      driveTo   = 'E';
 
TBuf<1> newDrive;
newDrive.Append( driveTo );
 
for(TInt i = 0; i < dbUriList->Count(); i++ )
{
   uri = (*dbUriList)[i];
   if( uri[7] == driveFrom )
   {
      // setup new URI: file://C... -> file://E...
      newUri = uri;
      newUri.Replace( 7, 1, newDrive ); 
      // check if such DB exists
      if( dbManager->DatabaseExistsL( newUri ) ) 
      {
         // delete if already exists
         dbManager->DeleteDatabaseL( newUri );  
      }
      dbManager->CopyDatabaseL( uri, newUri );
   }
}
 
CleanupStack :: PopAndDestroy( 2 ); // iDbList dbManager

Internal Links

• How to export landmarks from database to file
• How to import landmarks from file to database