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
try
			{
				return ( (IDesignElement) source ).clone( );
			}
			catch ( CloneNotSupportedException e )
			{
				e.printStackTrace( );
			}
		}
		if ( source instanceof SlotHandle )
		{
			SlotHandle slot = (SlotHandle) source;
			Object[] array = new Object[slot.getCount( )];
			for ( int i = 0; i < array.length; i++ )
			{
				array[i] = slot.get( i );
			}
			return cloneSource( array );
		}
		if ( source instanceof StructureHandle )
		{
			return ( (StructureHandle) source ).getStructure( ).copy( );
		}
		return null;
	}
	/**
	 * Drops source data
	 * 
	 * @param source
	 *            source to drop