diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementAnnotationProvider.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementAnnotationProvider.java
new file mode 100644
index 00000000000..1813cea1dea
--- /dev/null
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementAnnotationProvider.java
@@ -0,0 +1,28 @@
+/*******************************************************************************
+ * Copyright (c) 2008 ARM Limited and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * ARM Limited - Initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.cdt.debug.ui.disassembly;
+
+/**
+ * Provides context sensitive annotations for source elements.
+ * 
+ * This interface is experimental.
+ */
+public interface IDocumentElementAnnotationProvider {
+
+    /**
+     * Updates the annotations of the specified source elements.
+     * 
+     * @param updates each update specifies the element and context 
+     * for which annotations are requested and stores the results
+     */
+    public void update( IDocumentElementAnnotationUpdate[] updates );
+}
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementContentProvider.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementContentProvider.java
new file mode 100644
index 00000000000..5eb8f2084c8
--- /dev/null
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementContentProvider.java
@@ -0,0 +1,36 @@
+/*******************************************************************************
+ * Copyright (c) 2008 ARM Limited and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * ARM Limited - Initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.cdt.debug.ui.disassembly;
+
+/**
+ * Provides a content for a virtual source viewer.
+ * 
+ * This interface is experimental.
+ */
+public interface IDocumentElementContentProvider {
+
+    /**
+     * Updates the base element of the source viewer.
+     * This method is called when the viewer's input is changed.
+     *
+     * @param update the new input.
+     */
+    public void updateInput( IDocumentBaseChangeUpdate update );
+
+    /**
+     * Updates the source content as requested by the given update.
+     * This method is called when the viewer requires to update it's content.
+     * 
+     * @param update specifies the lines to update and stores result
+     */ 
+    public void updateContent( IDocumentElementContentUpdate update );
+}
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementLabelProvider.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementLabelProvider.java
new file mode 100644
index 00000000000..6308964d63e
--- /dev/null
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/disassembly/IDocumentElementLabelProvider.java
@@ -0,0 +1,28 @@
+/*******************************************************************************
+ * Copyright (c) 2008 ARM Limited and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * ARM Limited - Initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.cdt.debug.ui.disassembly;
+
+/**
+ * Provides context sensitive labels for source elements.
+ * 
+ * This interface is experimental.
+ */
+public interface IDocumentElementLabelProvider {
+
+    /**
+     * Updates the specified labels.
+     * 
+     * @param updates each update specifies the element and context 
+     * for which a label is requested and stores the label attributes
+     */
+    public void update( IDocumentElementLabelUpdate[] updates );
+}