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diff --git a/org.eclipse.jface.text/src/org/eclipse/jface/text/presentation/IPresentationDamager.java b/org.eclipse.jface.text/src/org/eclipse/jface/text/presentation/IPresentationDamager.java
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+++ b/org.eclipse.jface.text/src/org/eclipse/jface/text/presentation/IPresentationDamager.java
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+package org.eclipse.jface.text.presentation;
+
+/*
+ * (c) Copyright IBM Corp. 2000, 2001.
+ * All Rights Reserved.
+ */
+
+
+import org.eclipse.jface.text.DocumentEvent;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITypedRegion;
+
+
+/**
+ * Presentation damagers are used by a presentation reconciler to determine the 
+ * region of the document's presentation which must be rebuilt because of the 
+ * occurrence of a document change. A presentation damager is assumed to be 
+ * specific for a particular document content type. A presentation damager is 
+ * expected to return a damage region which is a valid input for a presentation repairer.
+ * I.e. having access to the damage region only the repairer must be able to derive
+ * all the information neede to sucessfully repair this region.<p>
+ * This interface must either be implemented by clients or clients use the rule-based
+ * default implementation <code>RuleBasedDamagerRepairer</code>. Implementers should be
+ * registered with a presentation reconciler in order get involved in the reconciling 
+ * process.
+ *
+ * @see IPresentationReconciler
+ * @see IDocument
+ * @see DocumentEvent
+ * @see IPresentationRepairer
+ */
+public interface IPresentationDamager {
+	
+	/**
+	 * Tells the presentation damager on which document it will work.
+	 *
+	 * @param document the damager's working document
+	 */
+	void setDocument(IDocument document);
+	
+	/**
+	 * Returns the damage in the document's presentation caused by the given document change.
+	 * The damage is restricted to the specified partition for which the presentation damager is
+	 * responsible. The damage may also depend on whether the document change also caused changes
+	 * of the document's partitioning.
+	 *
+	 * @param partition the partition inside which the damage must be determined
+	 * @param event the event describing the change whose damage must be determined
+	 * @param documentPartitioningChange indicates whether the given change changed the document's partitioning
+	 * @return the computed damage
+	 */
+	IRegion getDamageRegion(ITypedRegion partition, DocumentEvent event, boolean documentPartitioningChanged);
+}
+\ No newline at end of file