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
* @param fileName
	 *            the file name of the library to open. This name must include
	 *            the file name with the filename extension.
	 * @param options
	 *            the options set for this module
	 * @return the opened library
	 * @throws DesignFileException
	 *             If the file is not found, or the file contains fatal errors.
	 */
	public Library openLibrary( String fileName, ModuleOption options )
			throws DesignFileException
	{
		if ( fileName == null )
			throw new IllegalArgumentException( "The file name must not be null" ); 
		initializeOptions( options );
		Library library = LibraryReader.getInstance( ).read( this,
				fileName,
				options );
		libraries.add( library );
		return library;
	}
	/**
	 * Opens a library given a stream to the library and the the file name of
	 * the library.
	 * 
	 * @param fileName
	 *            The name of the file to open. If null, the library will be
	 *            treated as a new library, and will be saved to a different
	 *            file. If not <code>null</code>, this name must include the
	 *            file name with the filename extension.