### Eclipse Workspace Patch 1.0
#P org.eclipse.equinox.p2.director
Index: src/org/eclipse/equinox/internal/p2/director/Explanation.java
===================================================================
RCS file: /cvsroot/rt/org.eclipse.equinox/p2/bundles/org.eclipse.equinox.p2.director/src/org/eclipse/equinox/internal/p2/director/Explanation.java,v
retrieving revision 1.10
diff -u -r1.10 Explanation.java
--- src/org/eclipse/equinox/internal/p2/director/Explanation.java	19 Apr 2010 06:18:19 -0000	1.10
+++ src/org/eclipse/equinox/internal/p2/director/Explanation.java	21 Apr 2010 20:14:38 -0000
@@ -12,6 +12,7 @@
 
 import java.util.Arrays;
 import org.eclipse.core.runtime.*;
+import org.eclipse.equinox.internal.p2.metadata.IRequiredCapability;
 import org.eclipse.equinox.p2.metadata.*;
 import org.eclipse.osgi.util.NLS;
 
@@ -120,11 +121,18 @@
 		public final IInstallableUnit iu;
 		public final IRequirement req;
 
-		public MissingIU(IInstallableUnit iu, IRequirement req) {
+		private MissingIU(IInstallableUnit iu, IRequirement req) {
 			this.iu = iu;
 			this.req = req;
 		}
 
+		public static Explanation create(IInstallableUnit iu, IRequirement req) {
+			if (req instanceof IRequiredCapability && "A.PDE.Target.Platform".equals(((IRequiredCapability) req).getNamespace())) {
+				return new TargetPlatformProblem(iu);
+			}
+			return new MissingIU(iu, req);
+		}
+
 		public int orderValue() {
 			return 3;
 		}
@@ -148,6 +156,30 @@
 		}
 	}
 
+	public static class TargetPlatformProblem extends Explanation {
+		public final IInstallableUnit iu;
+
+		TargetPlatformProblem(IInstallableUnit iu) {
+			this.iu = iu;
+		}
+
+		public int orderValue() {
+			return 3;
+		}
+
+		public int shortAnswer() {
+			return MISSING_REQUIREMENT;
+		}
+
+		public String toString() {
+			return NLS.bind(Messages.Director_For_Target, iu);
+		}
+
+		public IStatus toStatus() {
+			return new Status(IStatus.ERROR, DirectorActivator.PI_DIRECTOR, NLS.bind(Messages.Director_For_Target, getUserReadableName(iu)));
+		}
+	}
+
 	public static class MissingGreedyIU extends Explanation {
 		public final IInstallableUnit iu;
 
Index: src/org/eclipse/equinox/internal/p2/director/Messages.java
===================================================================
RCS file: /cvsroot/rt/org.eclipse.equinox/p2/bundles/org.eclipse.equinox.p2.director/src/org/eclipse/equinox/internal/p2/director/Messages.java,v
retrieving revision 1.22
diff -u -r1.22 Messages.java
--- src/org/eclipse/equinox/internal/p2/director/Messages.java	19 Apr 2010 06:18:18 -0000	1.22
+++ src/org/eclipse/equinox/internal/p2/director/Messages.java	21 Apr 2010 20:14:38 -0000
@@ -30,6 +30,8 @@
 	public static String Director_Task_Resolving_Dependencies;
 	public static String Director_Unsatisfied_Dependencies;
 	public static String Director_error_applying_configuration;
+	public static String Director_For_Target;
+	public static String Director_For_Target_Unselect_Required;
 
 	public static String Explanation_alreadyInstalled;
 	public static String Explanation_from;
Index: src/org/eclipse/equinox/internal/p2/director/Projector.java
===================================================================
RCS file: /cvsroot/rt/org.eclipse.equinox/p2/bundles/org.eclipse.equinox.p2.director/src/org/eclipse/equinox/internal/p2/director/Projector.java,v
retrieving revision 1.61
diff -u -r1.61 Projector.java
--- src/org/eclipse/equinox/internal/p2/director/Projector.java	19 Apr 2010 06:18:19 -0000	1.61
+++ src/org/eclipse/equinox/internal/p2/director/Projector.java	21 Apr 2010 20:14:38 -0000
@@ -367,7 +367,7 @@
 		if (DEBUG) {
 			Tracing.debug(iu + "=0"); //$NON-NLS-1$
 		}
-		dependencyHelper.setFalse(iu, new Explanation.MissingIU(iu, req));
+		dependencyHelper.setFalse(iu, Explanation.MissingIU.create(iu, req));
 	}
 
 	// Check whether the requirement is applicable
Index: src/org/eclipse/equinox/internal/p2/director/messages.properties
===================================================================
RCS file: /cvsroot/rt/org.eclipse.equinox/p2/bundles/org.eclipse.equinox.p2.director/src/org/eclipse/equinox/internal/p2/director/messages.properties,v
retrieving revision 1.27
diff -u -r1.27 messages.properties
--- src/org/eclipse/equinox/internal/p2/director/messages.properties	19 Apr 2010 06:18:18 -0000	1.27
+++ src/org/eclipse/equinox/internal/p2/director/messages.properties	21 Apr 2010 20:14:38 -0000
@@ -16,6 +16,8 @@
 Director_Unsatisfied_Dependencies=\
 Cannot complete the install because some dependencies are not satisfiable
 Director_error_applying_configuration=Unexpected failure applying configuration after for the installer plan execution.
+Director_For_Target = The following software {0} cannot be installed because it is intended for use only in Plug-in Development Environment (PDE) target platforms. Please deselect these items and retry the operation.
+Director_For_Target_Unselect_Required = If provisioning a target platform then try disabling the option ''Include required software''
 
 Explanation_alreadyInstalled=Software currently installed: {0}
 Explanation_from=From: {0}