Bug 176436 Charts Imported from Libraries do not update when libraries change
During a live presentation of BIRT at EclipseCon, we came across a rather embarassing issue. When charts are included in a library, and imported into a report design from a library, any changes to the library instance of the chart do not reflect in the report itself.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
*/
	public void visitJointDataSet( JointDataSet obj )
	{
		writer.startElement( DesignSchemaConstants.JOINT_DATA_SET_TAG );
		super.visitJointDataSet( obj );
		writeStructureList( obj, IDataSetModel.PARAMETERS_PROP );
		writeStructureList( obj, IDataSetModel.RESULT_SET_PROP );
		writeSimplePropertyList( obj, IJointDataSetModel.DATA_SETS_PROP );
		writeStructureList( obj, IJointDataSetModel.JOIN_CONDITONS_PROP );
		writer.endElement( );
	}
	/**
	 * Visits the designer state of the oda data set.
	 * 
	 * @param obj
	 *            the oda data set to traverse
	 */
	private void writeOdaDesignerState( DesignElement obj, String propName )
	{
		OdaDesignerState designerState = (OdaDesignerState) obj
				.getLocalProperty( getModule( ), propName );
		if ( designerState == null )
			return;
		writer.startElement( DesignSchemaConstants.STRUCTURE_TAG );
		writer.attribute( IDesignElementModel.NAME_PROP,
				IOdaDataSetModel.DESIGNER_STATE_PROP );
		property( designerState, OdaDesignerState.VERSION_MEMBER );
		property( designerState, OdaDesignerState.CONTENT_AS_STRING_MEMBER );
		try
		{