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.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
{
			return performMultiInsert( ( (IStructuredSelection) insertObj ).toArray( ),
					target,
					targetParent );
		}
		return null;
	}
	/**
	 * Creates a object, "Add" operation to layout needs to handle later.
	 * <p>
	 * Must make sure operation legal before execution.
	 * </p>
	 * 
	 * @param insertObj
	 *            object insert to layout
	 * @param editPart
	 *            target EditPart
	 * @return new object in layout
	 * @throws SemanticException
	 */
	public static DesignElementHandle performInsert( Object insertObj,
			EditPart editPart ) throws SemanticException
	{
		Assert.isNotNull( insertObj );
		Assert.isNotNull( editPart );
		return performInsert( insertObj,
				editPart.getModel( ),
				editPart.getParent( ).getModel( ) );
	}
	/**