Bug 122419 Masterpage cannot access Data Set properties
If one references a data set property in the master page, i.e. row["title"], then the viewer displays only 'undefined'.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/ReportQueryBuilder.java
if ( DesignChoiceConstants.INTERVAL_PREFIX.equals( interval ) )
			{
				return IGroupDefinition.STRING_PREFIX_INTERVAL;
			}
			if ( DesignChoiceConstants.INTERVAL_SECOND.equals( interval ) )
			{
				return IGroupDefinition.SECOND_INTERVAL;
			}
			if ( DesignChoiceConstants.INTERVAL_INTERVAL.equals( interval ) )
			{
				return IGroupDefinition.NUMERIC_INTERVAL;
			}
			return IGroupDefinition.NO_INTERVAL;
		}
		/**
		 * @param direction
		 *            "asc" or "desc" string
		 * @return integer value defined in <code>ISortDefn</code>
		 */
		protected int parseSortDirection( String direction )
		{
			if ( "asc".equals( direction ) ) 
				return ISortDefinition.SORT_ASC;
			if ( "desc".equals( direction ) ) 
				return ISortDefinition.SORT_DESC;
			assert false;
			return 0;
		}
	}
}