Bug 312761 It makes no difference changing the series labels position in Radar chart.[13]
chart/org.eclipse.birt.chart.ui/src/org/eclipse/birt/chart/ui/util/ChartUIUtil.java
.getGroupType( );
				if ( queryDataType == DataType.NUMERIC_LITERAL
						&& groupDataType == DataType.DATE_TIME_LITERAL )
				{
					return groupDataType.getName( );
				}
				else if ( queryDataType == DataType.TEXT_LITERAL
						&& groupDataType != DataType.TEXT_LITERAL )
				{
					return groupDataType.getName( );
				}
			}
		}
		return isConsistent;
	}
	/**
	 * To check the group type of category and y series. If not compatible ,
	 * show a warning.
	 * 
	 * @param context
	 * @param chart
	 */
	public static void checkGroupType( ChartWizardContext context, Chart chart )
	{
		String cGroupWarning = checkGroupTypeOnCategory( context, chart );
		if ( cGroupWarning.length( ) != 0 )
		{
			cGroupWarning = Messages.getString( "TaskSelectData.Warning.CategoryGroupTypeCheck", 
					new String[]{
						cGroupWarning