Bug 119331 Library - name space terminology and behavior
During BIRT 2.0 library feature review meeting the following change was decided. - Change the term namespace to 'prefix' - By default use the library name as the prefix ( namespace ); the dialog to input prefix should be prompted only if hte auto generated prefix is not unique.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
if ( source instanceof ColumnHandle )
		{
			try
			{
				int columnNumber = HandleAdapterFactory.getInstance( )
						.getColumnHandleAdapter( source )
						.getColumnNumber( );
				Object parent = ( (ColumnHandle) source ).getContainer( );
				if ( parent instanceof TableHandle )
				{
					return ( (TableHandle) parent ).copyColumn( columnNumber );
				}
				else if ( parent instanceof GridHandle )
				{
					return ( (GridHandle) parent ).copyColumn( columnNumber );
				}
			}
			catch ( SemanticException e )
			{
				e.printStackTrace( );
			}
			return null;
		}
		if ( source instanceof DesignElementHandle )
		{
			IDesignElement copyElement = ( (DesignElementHandle) source ).copy( );
			return copyElement;
		}
		if ( source instanceof IDesignElement )
		{