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
* 
 * @see org.eclipse.birt.chart.model.data.DataFactory
 * @generated
 */
public interface DataPackage extends EPackage
{
	/**
	 * The package name.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	String eNAME = "data"; 
	/**
	 * The package namespace URI.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	String eNS_URI = "http://www.birt.eclipse.org/ChartModelData"; 
	/**
	 * The package namespace name.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	String eNS_PREFIX = "data"; 
	/**
	 * The singleton instance of the package.
	 * <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * @generated
	 */