Bug 185931 Support to distinguish the week between Year-Week and Month-Week[1101]
Description: In our OLAP builder, the datetime dimension is divided into YEAR-QUARTER-MONTH-WEEK-DAY. When select all the levels, the WEEK should be the week(1 to 5) in one MONTH When select YEAR-WEEK levels, the WEEK should be the week(1 to 52) in one YEAR But now in our OLAP builder, the WEEK only belong to the MONTH, But not belong to the year, so if only select the YEAR-WEEK level, the result of crosstab is meaningless. The YEAR-DAY, MONTH-DAY and WEEK-DAY also have the same issues. we should define a rule to make sure the WEEK has a correct relationship of his parent
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* Returns a slot handle to work with the top-level parameters and parameter
	 * groups within the report. The order that the items appear within the slot
	 * determines the order in which they appear in the "requester" UI.
	 * 
	 * @return A handle for working with the parameters and parameter groups.
	 */
	public SlotHandle getParameters( )
	{
		return getSlot( PARAMETER_SLOT );
	}
	/**
	 * Returns a cascading parameter group handle with the given group name
	 * 
	 * @param groupName
	 *            name of the cascading parameter group.
	 * @return a handle to the cascading parameter group. Returns
	 *         <code>null</code> if the cascading group with the given name is
	 *         not found.
	 */
	public CascadingParameterGroupHandle findCascadingParameterGroup(
			String groupName )
	{
		DesignElement element = module.findParameter( groupName );
		if ( element == null || !( element instanceof CascadingParameterGroup ) )
			return null;
		return (CascadingParameterGroupHandle) element.getHandle( element
				.getRoot( ) );
	}
	/**
	 * Returns a slot handle to work with the styles within the report. Note