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
* Each one is the instance of <code>EmbeddedImageHandle</code>
	 * 
	 * @return the list of embedded images.
	 * 
	 * @see EmbeddedImageHandle
	 */
	public List getAllImages( )
	{
		return getStructureList( IMAGES_PROP );
	}
	/**
	 * Determines if the design has changed since it was last read from, or
	 * written to, the file. The dirty state reflects the action of the command
	 * stack. If the user saves the design and then changes it, the design is
	 * dirty. If the user then undoes the change, the design is no longer dirty.
	 * 
	 * @return <code>true</code> if the design has changed since the last load
	 *         or save; <code>false</code> if it has not changed.
	 */
	public boolean needsSave( )
	{
		String version = module.getVersionManager( ).getVersion( );
		if ( version != null )
		{
			List versionInfos = ModelUtil.checkVersion( version );
			if ( !versionInfos.isEmpty( ) )
				return true;
		}
		return module.isDirty( );
	}