diff --git a/model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/interfaces/IImageItemModel.java b/model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/interfaces/IImageItemModel.java
index 6ae4562568c..aacbcfb2a10 100644
--- a/model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/interfaces/IImageItemModel.java
+++ b/model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/interfaces/IImageItemModel.java
@@ -23,6 +23,20 @@ public interface IImageItemModel
 	 */
 
 	public static final String IMAGE_NAME_PROP = "imageName"; //$NON-NLS-1$
+	
+	/**
+	 * Name of the optional text property, which is used to display in place of
+	 * the image in a web browser.
+	 */
+	
+	public static final String ALT_TEXT_PROP = "altText"; //$NON-NLS-1$
+
+	/**
+	 * Name of the optional text resource key property.
+	 */
+	
+	public static final String ALT_TEXT_KEY_PROP = "altTextID"; //$NON-NLS-1$
+
 
 	/**
 	 * Name of the size property, which defines how to manage the relationship