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diff --git a/Source/cmSetPropertyCommand.h b/Source/cmSetPropertyCommand.h
new file mode 100644
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--- /dev/null
+++ b/Source/cmSetPropertyCommand.h
@@ -0,0 +1,116 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#ifndef cmSetsPropertiesCommand_h
+#define cmSetsPropertiesCommand_h
+
+#include "cmCommand.h"
+
+class cmSetPropertyCommand : public cmCommand
+{
+public:
+  cmSetPropertyCommand();
+
+  virtual cmCommand* Clone()
+    {
+      return new cmSetPropertyCommand;
+    }
+
+  /**
+   * This is called when the command is first encountered in
+   * the input file.
+   */
+  virtual bool InitialPass(std::vector<std::string> const& args,
+                           cmExecutionStatus &status);
+
+  /**
+   * The name of the command as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() const { return "set_property";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() const
+    {
+    return "Set a named property in a given scope.";
+    }
+
+  /**
+   * Longer documentation.
+   */
+  virtual const char* GetFullDocumentation() const
+    {
+      return
+        "  set_property(<GLOBAL                            |\n"
+        "                DIRECTORY [dir]                   |\n"
+        "                TARGET    [target1 [target2 ...]] |\n"
+        "                SOURCE    [src1 [src2 ...]]       |\n"
+        "                TEST      [test1 [test2 ...]]     |\n"
+        "                CACHE     [entry1 [entry2 ...]]>\n"
+        "               [APPEND] [APPEND_STRING]\n"
+        "               PROPERTY <name> [value1 [value2 ...]])\n"
+        "Set one property on zero or more objects of a scope.  "
+        "The first argument determines the scope in which the property "
+        "is set.  It must be one of the following:\n"
+        "GLOBAL scope is unique and does not accept a name.\n"
+        "DIRECTORY scope defaults to the current directory but another "
+        "directory (already processed by CMake) may be named by full or "
+        "relative path.\n"
+        "TARGET scope may name zero or more existing targets.\n"
+        "SOURCE scope may name zero or more source files.  "
+        "Note that source file properties are visible only to targets "
+        "added in the same directory (CMakeLists.txt).\n"
+        "TEST scope may name zero or more existing tests.\n"
+        "CACHE scope must name zero or more cache existing entries.\n"
+        "The required PROPERTY option is immediately followed by the name "
+        "of the property to set.  Remaining arguments are used to "
+        "compose the property value in the form of a semicolon-separated "
+        "list.  "
+        "If the APPEND option is given the list is appended to any "
+        "existing property value."
+        "If the APPEND_STRING option is given the string is append to any "
+        "existing property value as string, i.e. it results in a longer "
+        "string and not a list of strings."
+        ;
+    }
+
+  /**
+   * This determines if the command is invoked when in script mode.
+   */
+  virtual bool IsScriptable() const { return true; }
+
+  cmTypeMacro(cmSetPropertyCommand, cmCommand);
+
+private:
+  std::set<cmStdString> Names;
+  std::string PropertyName;
+  std::string PropertyValue;
+  bool Remove;
+  bool AppendMode;
+  bool AppendAsString;
+
+  // Implementation of each property type.
+  bool HandleGlobalMode();
+  bool HandleDirectoryMode();
+  bool HandleTargetMode();
+  bool HandleTarget(cmTarget* target);
+  bool HandleSourceMode();
+  bool HandleSource(cmSourceFile* sf);
+  bool HandleTestMode();
+  bool HandleTest(cmTest* test);
+  bool HandleCacheMode();
+  bool HandleCacheEntry(cmCacheManager::CacheIterator&);
+};
+
+
+
+#endif