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
/**
		 * the total number of queries created in this report
		 */
		protected int queryCount = 0;
		/**
		 * a collection of the expressions on the CURRENT query
		 */
		protected Collection expressions;
		/**
		 * the expression stack. This is a link list of collections, not a
		 * link-list of individual expressions.
		 */
		protected LinkedList expressionStack = new LinkedList( );
		
		/* report item query stack
		 * 
		 */
		protected LinkedList reportItemQueryStack;
		/**
		 * entry point to the report
		 */
		protected Report report;
		/**
		 * the execution context
		 */
		protected ExecutionContext context;
		/**
		 * create report query definitions for this report.
		 * 
		 * @param report