Bug 202254 Exception is thrown when category values are null and type of X axis is set to DateTime
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/data/DataPackage.java
* @generated
	 */
	EReference getSampleData_AncillarySampleData( );
	/**
	 * Returns the meta object for class '{@link org.eclipse.birt.chart.model.data.SeriesDefinition <em>Series Definition</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for class '<em>Series Definition</em>'.
	 * @see org.eclipse.birt.chart.model.data.SeriesDefinition
	 * @generated
	 */
	EClass getSeriesDefinition( );
	/**
	 * Returns the meta object for the containment reference '{@link org.eclipse.birt.chart.model.data.SeriesDefinition#getQuery <em>Query</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the containment reference '<em>Query</em>'.
	 * @see org.eclipse.birt.chart.model.data.SeriesDefinition#getQuery()
	 * @see #getSeriesDefinition()
	 * @generated
	 */
	EReference getSeriesDefinition_Query( );
	/**
	 * Returns the meta object for the containment reference '{@link org.eclipse.birt.chart.model.data.SeriesDefinition#getSeriesPalette <em>Series Palette</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the containment reference '<em>Series Palette</em>'.
	 * @see org.eclipse.birt.chart.model.data.SeriesDefinition#getSeriesPalette()
	 * @see #getSeriesDefinition()
	 * @generated
	 */
	EReference getSeriesDefinition_SeriesPalette( );
	/**