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
if ( currDataSet == null )
				{
					return false;
				}
				if ( dataSet == null )
				{
					dataSet = currDataSet;
				}
				else
				{
					if ( dataSet != currDataSet )
					{
						return false;
					}
				}
			}
		}
		return true;
	}
	/**
	 * Validates container of drop target from data set in data view
	 * 
	 * @param dropPart
	 * @return validate result
	 */
	protected static boolean handleValidateDataSetDropContainer(
			EditPart dropPart )
	{
		if ( dropPart.getParent( ) == null )
		{