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
{
			for ( int i = 0; i < handles.length; i++ )
			{
				if ( content == handles[i] )
				{
					continue;
				}
				
				if ( child == handles[i] )
				{
					return true;
				}
				if ( handles[i] instanceof DesignElementHandle )
				{
					
					if ( child instanceof CellHandle
							&& handles[i] instanceof ColumnHandle )
					{
						if ( isInSameColumn( new Object[]{
								child, handles[i]
						} ) )
						{
							return true;
						}
						continue;
					}
					
					DesignElementHandle container = child.getContainer( );
					while ( container != null )
					{