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/core/DesignSession.java
}
	/**
	 * Opens a design given the file name of the design.
	 * 
	 * @param fileName
	 *            The name of the file to open. This name must include the file
	 *            name with the filename extension.
	 * @param options
	 *            the options set for this module
	 * @return the opened report design.
	 * @throws DesignFileException
	 *             If the file is not found, or the file contains fatal errors.
	 */
	public ReportDesign openDesign( String fileName, ModuleOption options )
			throws DesignFileException
	{
		if ( fileName == null )
			throw new IllegalArgumentException( "The file name must not be null" ); 
		initializeOptions( options );
		ReportDesign design = DesignReader.getInstance( ).read( this, fileName,
				options );
		designs.add( design );
		return design;
	}
	/**
	 * Sets the settings in the options to the session local variables.
	 * 
	 * @param options
	 *            the settings used to open the report design
	 */