diff --git a/Source/cmFindIncludeRule.h b/Source/cmFindIncludeRule.h
index c2563d9d3..28da4ad2d 100644
--- a/Source/cmFindIncludeRule.h
+++ b/Source/cmFindIncludeRule.h
@@ -22,7 +22,7 @@
 /** \class cmFindIncludeRule
  * \brief Define a rule that searches for an include file.
  *
- * cmFindIncludeRule is used to define a variable include
+ * cmFindIncludeRule is used to define a CMake variable include
  * path location by specifying a file and list of directories.
  */
 class cmFindIncludeRule : public cmRuleMaker
@@ -74,7 +74,7 @@ public:
   virtual const char* FullDocumentation()
     {
     return
-      "FIND_INCLUDE(DEFINE try1 try2 ...);";
+      "FIND_INCLUDE(DEFINE try1 try2 ...)";
     }
 };
 
diff --git a/Source/cmFindLibraryRule.h b/Source/cmFindLibraryRule.h
index 4ab0b07a7..9f5f8dfe4 100644
--- a/Source/cmFindLibraryRule.h
+++ b/Source/cmFindLibraryRule.h
@@ -1,3 +1,18 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmFindLibraryRule_h
 #define cmFindLibraryRule_h
 
@@ -5,31 +20,62 @@
 #include "cmRuleMaker.h"
 
 
+/** \class cmFindLibraryRule
+ * \brief Define a rule to search for a library.
+ *
+ * cmFindLibraryRule is used to define a CMake variable
+ * that specifies a library. The rule searches for a given
+ * file in a list of directories.
+ */
 class cmFindLibraryRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmFindLibraryRule;
+    return new cmFindLibraryRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
-  virtual bool Invoke(std::vector<std::string>& args);
-  virtual void FinalPass() { }
-  virtual bool IsInherited() { return true;  }
 
-  // This is the name used in the input file.
-  virtual const char* GetName() { return "FIND_LIBRARY";}
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
+  virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
+  virtual void FinalPass() { }
+  
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
+  virtual bool IsInherited() {return true;}
+
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() {return "FIND_LIBRARY";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Set a name for the entire project. One argument.";
+    return "Find a library.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "FIND_LIBRARY(DEFINE try1 try2);";
+    return
+      "FIND_LIBRARY(DEFINE try1 try2)";
     }
 };
 
diff --git a/Source/cmFindProgramRule.h b/Source/cmFindProgramRule.h
index 8907c8670..10ad46e3e 100644
--- a/Source/cmFindProgramRule.h
+++ b/Source/cmFindProgramRule.h
@@ -1,36 +1,80 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmFindProgramRule_h
 #define cmFindProgramRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmFindProgramRule
+ * \brief Define a rule to search for an executable program.
+ *
+ * cmFindProgramRule is used to define a CMake variable
+ * that specifies an executable program. The rule searches 
+ * for a given file in a list of directories.
+ */
 class cmFindProgramRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmFindProgramRule;
+    return new cmFindProgramRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
+
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
   virtual bool IsInherited() { return true;  }
 
-  // This is the name used in the input file.
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "FIND_PROGRARM";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "not implemented.";
+    return "Find an executable program.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "not implemented.\n"
-        "FIND_PROGRARM(NAME try1 try2 ...);";
+    return
+      "FIND_PROGRAM(NAME try1 try2 ...)";
     }
 };
 
diff --git a/Source/cmIncludeDirectoryRule.h b/Source/cmIncludeDirectoryRule.h
index ec59614b7..58390fb8f 100644
--- a/Source/cmIncludeDirectoryRule.h
+++ b/Source/cmIncludeDirectoryRule.h
@@ -1,35 +1,79 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmIncludeDirectoryRule_h
 #define cmIncludeDirectoryRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmIncludeDirectoryRule
+ * \brief Add include directories to the build.
+ *
+ * cmIncludeDirectoryRule is used to specify directory locations
+ * to search for included files.
+ */
 class cmIncludeDirectoryRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmIncludeDirectoryRule;
+    return new cmIncludeDirectoryRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
-  virtual bool Invoke(std::vector<std::string>& args);
-  virtual void FinalPass() { }
-  virtual bool IsInherited() { return true;  }
 
-  // This is the name used in the input file.
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
+  virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
+  virtual void FinalPass() { }
+
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
+  virtual bool IsInherited() {return true;}
+
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "INCLUDE_DIRECTORIES";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Add include directories to the build.";
+    return "Add include directories to the build.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "INCLUDE_DIRECTORIES(dir1 dir2 ...).\n";
+    return
+      "INCLUDE_DIRECTORIES(dir1 dir2 ...).\n";
     }
 };
 
diff --git a/Source/cmLibraryRule.h b/Source/cmLibraryRule.h
index 61db5e72f..2a4ce2d50 100644
--- a/Source/cmLibraryRule.h
+++ b/Source/cmLibraryRule.h
@@ -1,3 +1,18 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmLibraryRule_h
 #define cmLibraryRule_h
 
@@ -5,30 +20,55 @@
 #include "cmRuleMaker.h"
 
 
+/** \class cmLibraryRule
+ * \brief Specify a name for a library.
+ *
+ * cmLibraryRule is used to specify the name of a library to be
+ * generated by the build process.
+ */
 class cmLibraryRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmLibraryRule;
+    return new cmLibraryRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
   
-  // This is the name used in the input file.
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "LIBRARY";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Set a name for the Library.";
+    return "Set a name for a library.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "LIBRARY(libraryname);";
+    return
+      "LIBRARY(libraryname)";
     }
 };
 
diff --git a/Source/cmLinkDirectoriesRule.h b/Source/cmLinkDirectoriesRule.h
index 87df9d534..b30318748 100644
--- a/Source/cmLinkDirectoriesRule.h
+++ b/Source/cmLinkDirectoriesRule.h
@@ -1,39 +1,84 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmLinkDirectoriesRule_h
 #define cmLinkDirectoriesRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmLinkDirectoriesRule
+ * \brief Define a list of directories containing files to link.
+ *
+ * cmLinkDirectoriesRule is used to specify a list
+ * of directories containing files to link into executable(s). 
+ * Note that the rule supports the use of CMake built-in variables 
+ * such as CMAKE_BINARY_DIR and CMAKE_SOURCE_DIR.
+ */
 class cmLinkDirectoriesRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmLinkDirectoriesRule;
+    return new cmLinkDirectoriesRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
+
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
   virtual bool IsInherited() { return true;  }
 
-  
-  // This is the name used in the input file.
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "LINK_DIRECTORIES";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Specify link directories.";
+    return "Specify link directories.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "Specify the paths to the libraries that will be linked in.\n"
-        "LINK_DIRECTORIES(directory1 directory2 ...);\n"
-        "The directories can use built in definitions like \n"
-        "CMAKE_BINARY_DIR and CMAKE_SOURCE_DIR.";
+    return
+      "Specify the paths to the libraries that will be linked in.\n"
+      "LINK_DIRECTORIES(directory1 directory2 ...)\n"
+      "The directories can use built in definitions like \n"
+      "CMAKE_BINARY_DIR and CMAKE_SOURCE_DIR.";
     }
 };
 
diff --git a/Source/cmLinkLibrariesRule.h b/Source/cmLinkLibrariesRule.h
index c98e3fbea..ea8c36e29 100644
--- a/Source/cmLinkLibrariesRule.h
+++ b/Source/cmLinkLibrariesRule.h
@@ -1,42 +1,86 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmLinkLibrariesRule_h
 #define cmLinkLibrariesRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmLinkLibrariesRule
+ * \brief Specify a list of libraries to link into executables.
+ *
+ * cmLinkLibrariesRule is used to specify a list of libraries to link
+ * into executable(s) or shared objects. The names of the libraries
+ * should be those defined by the LIBRARY(library) rule(s).  
+ */
 class cmLinkLibrariesRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmLinkLibrariesRule;
+    return new cmLinkLibrariesRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
-  virtual bool IsInherited() { return true;  }
+
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
+  virtual bool IsInherited() {return true;}
   
-    
-  // This is the name used in the input file.
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "LINK_LIBRARIES";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return 
-        "Specify a list of libraries to be linked into executables or \n"
-        "shared objects.";
+    return 
+      "Specify a list of libraries to be linked into executables or \n"
+      "shared objects.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "Specify a list of libraries to be linked into executables or \n"
-        "shared objects.  This rule is passed down to all other rules."
-        "LINK_LIBRARIES(library1 library2).\n"
-        "The library name should be the same as the name used in the\n"
-        "LIBRARY(library) rule.";
+    return
+      "Specify a list of libraries to be linked into executables or \n"
+      "shared objects.  This rule is passed down to all other rules."
+      "LINK_LIBRARIES(library1 library2).\n"
+      "The library name should be the same as the name used in the\n"
+      "LIBRARY(library) rule.";
     }
 };
 
diff --git a/Source/cmProjectRule.h b/Source/cmProjectRule.h
index 22ebf614a..ef9cb2d1a 100644
--- a/Source/cmProjectRule.h
+++ b/Source/cmProjectRule.h
@@ -1,35 +1,75 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmProjectRule_h
 #define cmProjectRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmProjectRule
+ * \brief Specify the name for this build project.
+ *
+ * cmProjectRule is used to specify a name for this build project.
+ * It is defined once per set of CMakeList.txt files (including
+ * all subdirectories).
+ */
 class cmProjectRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmProjectRule;
+    return new cmProjectRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+  
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
   
-  // This is the name used in the input file.
-  virtual const char* GetName() { return "PROJECT";}
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() {return "PROJECT";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Set a name for the entire project. One argument.";
+    return "Set a name for the entire project. One argument.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "Set the name for the entire project.  This takes one argument.\n"
-        "PROJECT(projectname);";
+    return
+      "Set the name for the entire project.  This takes one argument.\n"
+      "PROJECT(projectname)";
     }
 };
 
diff --git a/Source/cmSourceFilesRequireRule.h b/Source/cmSourceFilesRequireRule.h
index 4a7d2c0d1..845c72f32 100644
--- a/Source/cmSourceFilesRequireRule.h
+++ b/Source/cmSourceFilesRequireRule.h
@@ -1,37 +1,78 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmSourceFilesRequireRule_h
 #define cmSourceFilesRequireRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmSourceFilesRequireRule
+ * \brief Add additional sources to the build if certain required files
+ *        or CMake variables are defined.
+ *
+ * cmSourceFilesRequireRule conditionally adds source files to the
+ * build if the specified files of CMake variables are defined.
+ * This rule can be used to add source files that depend on external
+ * packages or operating system features.
+*/
 class cmSourceFilesRequireRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmSourceFilesRequireRule;
+    return new cmSourceFilesRequireRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
   
-  // This is the name used in the input file.
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "SOURCE_FILES_REQUIRE";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Add a list of source files.";
+    return "Add a list of source files if the required variables are set.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "SOURCE_FILES(file1 file2 ...)";
+    return
+      "SOURCE_FILES_REQUIRE(var1 var2 ... SOURCES_BEGIN file1 file2 ...)";
     }
 };
 
 
-
 #endif
diff --git a/Source/cmSourceFilesRule.h b/Source/cmSourceFilesRule.h
index 7e4151a01..c41b3a68f 100644
--- a/Source/cmSourceFilesRule.h
+++ b/Source/cmSourceFilesRule.h
@@ -1,34 +1,78 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmSourceFilesRule_h
 #define cmSourceFilesRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmSourceFilesRule
+ * \brief Add source files to the build.
+ *
+ * cmSourceFilesRule adds source files to the build. The source
+ * files will be added to the current library (if defined by the
+ * LIBRARY(library) rule. Use this rule to add source files not
+ * dependent on other packages (use SOURCE_FILES_REQUIRED() to add
+ * dependent source files).
+ *
+ * \sa cmSourceFilesRequireRule
+ */
 class cmSourceFilesRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmSourceFilesRule;
+    return new cmSourceFilesRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
   
-  // This is the name used in the input file.
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "SOURCE_FILES";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Add a list of source files.";
+    return "Add a list of source files.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "SOURCE_FILES(file1 file2 ...)";
+    return
+      "SOURCE_FILES(file1 file2 ...)";
     }
 };
 
diff --git a/Source/cmSubdirRule.h b/Source/cmSubdirRule.h
index 4a6b1665a..1e081e866 100644
--- a/Source/cmSubdirRule.h
+++ b/Source/cmSubdirRule.h
@@ -1,37 +1,77 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmSubdirRule_h
 #define cmSubdirRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmSubdirRule
+ * \brief Specify a list of subdirectories to build.
+ *
+ * cmSubdirRule specifies a list of subdirectories to process
+ * by CMake. For each subdirectory listed, CMake will descend
+ * into that subdirectory and process any CMakeLists.txt found.
+ */
 class cmSubdirRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmSubdirRule;
+    return new cmSubdirRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
   
-  // This is the name used in the input file.
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "SUBDIRS";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Add a list of subdirectories to the build.";
+    return "Add a list of subdirectories to the build.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "Add a list of subdirectories to the build.\n"
-        "SUBDIRS(dir1 dir2 ...)\n"
-        "This will cause any CMakeLists.txt files in the sub directories\n"
-        "to be parsed by cmake.";
+    return
+      "Add a list of subdirectories to the build.\n"
+      "SUBDIRS(dir1 dir2 ...)\n"
+      "This will cause any CMakeLists.txt files in the sub directories\n"
+      "to be processed by CMake.";
     }
 };
 
diff --git a/Source/cmTestsRule.h b/Source/cmTestsRule.h
index b0a7b0921..6ccfdab6d 100644
--- a/Source/cmTestsRule.h
+++ b/Source/cmTestsRule.h
@@ -1,34 +1,77 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmTestsRule_h
 #define cmTestsRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmTestsRule
+ * \brief Specify a list of executables to build and which are 
+ *        identified as tests.
+ *
+ * cmTestsRule specifies a list of executables to be built by CMake.
+ * These executables are identified as tests. This rule is similar to
+ * the EXECUTABLES() rule.
+ *
+ * \sa cmExecutablesRule
+ */
 class cmTestsRule : public cmRuleMaker
 {
 public:
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmTestsRule;
+    return new cmTestsRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
 
-  // This is the name used in the input file.
-  virtual const char* GetName() { return "TESTS";}
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() {return "TESTS";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Add a list of executables files that are run as tests.";
+    return "Add a list of executables files that are run as tests.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "TESTS(file1 file2 ...)";
+    return
+      "TESTS(file1 file2 ...)";
     }
 };
 
diff --git a/Source/cmUnixDefinesRule.h b/Source/cmUnixDefinesRule.h
index 0c216b0e6..fcf0170f1 100644
--- a/Source/cmUnixDefinesRule.h
+++ b/Source/cmUnixDefinesRule.h
@@ -1,37 +1,85 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmUnixDefinesRule_h
 #define cmUnixDefinesRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmUnixDefinesRule
+ * \brief Specify a list of compiler defines for Unix platforms.
+ *
+ * cmUnixDefinesRule specifies a list of compiler defines for Unix platforms
+ * only. This defines will be added to the compile command.
+ */
 class cmUnixDefinesRule : public cmRuleMaker
 {
 public:
+  /**
+   * Constructor.
+   */
   cmUnixDefinesRule();
+
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmUnixDefinesRule;
+    return new cmUnixDefinesRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
-  virtual bool Invoke(std::vector<std::string>& args);
-  virtual void FinalPass() { }
-  virtual bool IsInherited() { return true;  }
 
-  // This is the name used in the input file.
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
+  virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
+  virtual void FinalPass() { }
+
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
+  virtual bool IsInherited() {return true;}
+
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "UNIX_DEFINES";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Add -D flags to the command line for unix only.";
+    return "Add -D flags to the command line for Unix only.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "Add -D flags to the command line for unix only.\n"
-        "UNIX_DEFINES(-DFOO -DBAR);";
+    return
+      "Add -D flags to the command line for Unix only.\n"
+      "UNIX_DEFINES(-DFOO -DBAR)";
     }
 };
 
diff --git a/Source/cmUnixLibrariesRule.h b/Source/cmUnixLibrariesRule.h
index 8b8d5e0fa..fa04a2ba9 100644
--- a/Source/cmUnixLibrariesRule.h
+++ b/Source/cmUnixLibrariesRule.h
@@ -1,36 +1,84 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmUnixLibrariesRule_h
 #define cmUnixLibrariesRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmUnixLibrariesRule
+ * \brief Specify a list of libraries for Unix platforms.
+ *
+ * cmUnixLibrariesRule specifies a list of libraries for Unix platforms
+ * only. Both user and system libraries can be listed.
+ */
 class cmUnixLibrariesRule : public cmRuleMaker
 {
 public:
+  /**
+   * Constructor.
+   */
   cmUnixLibrariesRule();
+
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmUnixLibrariesRule;
+    return new cmUnixLibrariesRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
-  virtual bool Invoke(std::vector<std::string>& args);
-  virtual void FinalPass() { }
-  virtual bool IsInherited() { return true;  }
 
-  // This is the name used in the input file.
-  virtual const char* GetName() { return "UNIX_LIBRARIES";}
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
+  virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
+  virtual void FinalPass() { }
+
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
+  virtual bool IsInherited() {return true;}
+
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() {return "UNIX_LIBRARIES";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Add libraries that are only used for unix programs.";
+    return "Add libraries that are only used for Unix programs.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "UNIX_LIBRARIES(library -lm ...);";
+    return
+      "UNIX_LIBRARIES(library -lm ...)";
     }
 };
 
diff --git a/Source/cmWin32DefinesRule.h b/Source/cmWin32DefinesRule.h
index 5f81ee8c8..acb30191b 100644
--- a/Source/cmWin32DefinesRule.h
+++ b/Source/cmWin32DefinesRule.h
@@ -1,36 +1,85 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmWin32DefinesRule_h
 #define cmWin32DefinesRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmWin32DefinesRule
+ * \brief Specify a list of compiler defines for Win32 platforms.
+ *
+ * cmWin32DefinesRule specifies a list of compiler defines for Win32 platforms
+ * only. This defines will be added to the compile command.
+ */
 class cmWin32DefinesRule : public cmRuleMaker
 {
 public:
+  /**
+   * Constructor.
+   */
   cmWin32DefinesRule();
+
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmWin32DefinesRule;
+    return new cmWin32DefinesRule;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
+
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
   virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
   virtual void FinalPass() { }
-  virtual bool IsInherited() { return true;  }
-  // This is the name used in the input file.
-  virtual const char* GetName() { return "WIN32_DEFINES";}
+
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
+  virtual bool IsInherited() {return true;}
+
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() {return "WIN32_DEFINES";}
+  
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Add -D define flags to command line for win32 environments.";
+    return "Add -D define flags to command line for Win32 environments.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "Add -D define flags to command line for win32 environments.\n"
-        "WIN32_DEFINES(-DFOO -DBAR ...);";
+    return
+      "Add -D define flags to command line for Win32 environments.\n"
+      "WIN32_DEFINES(-DFOO -DBAR ...)";
     }
 };
 
diff --git a/Source/cmWin32LibrariesRule.h b/Source/cmWin32LibrariesRule.h
index 928b5f056..d08bc3f48 100644
--- a/Source/cmWin32LibrariesRule.h
+++ b/Source/cmWin32LibrariesRule.h
@@ -1,39 +1,84 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
 #ifndef cmWin32LibrariesRule_h
 #define cmWin32LibrariesRule_h
 
 #include "cmStandardIncludes.h"
 #include "cmRuleMaker.h"
 
-
+/** \class cmWin32LibrariesRule
+ * \brief Specify a list of libraries for Win32 platforms.
+ *
+ * cmWin32LibrariesRule specifies a list of libraries for Win32 platforms
+ * only. Both user and system libraries can be listed.
+ */
 class cmWin32LibrariesRule  : public cmRuleMaker
 {
 public:
+  /**
+   * Constructor.
+   */
   cmWin32LibrariesRule();
+
+  /**
+   * This is a virtual constructor for the rule.
+   */
   virtual cmRuleMaker* Clone() 
     {
-      return new cmWin32LibrariesRule ;
+    return new cmWin32LibrariesRule ;
     }
-  // This is called when the rule is firt encountered in
-  // the input file
-  virtual bool Invoke(std::vector<std::string>& args);
-  virtual void FinalPass() { }
-  virtual bool IsInherited() { return true;  }
 
-  // This is the name used in the input file.
+  /**
+   * This is called when the rule is first encountered in
+   * the CMakeLists.txt file.
+   */
+  virtual bool Invoke(std::vector<std::string>& args);
+
+  /**
+   * This is called at the end after all the information
+   * specified by the rules is accumulated.
+   */
+  virtual void FinalPass() { }
+
+  /**
+   * This determines if the rule gets propagated down
+   * to makefiles located in subdirectories.
+   */
+  virtual bool IsInherited() {return true;}
+
+  /**
+   * The name of the rule as specified in CMakeList.txt.
+   */
   virtual const char* GetName() { return "WIN32_LIBRARIES";}
+
+  /**
+   * Succinct documentation.
+   */
   virtual const char* TerseDocumentation() 
     {
-      return "Set a name for the library to be built. One argument.";
+    return "Add libraries that are only used for Win32 programs.";
     }
   
-  // Return full documentation for the rule
+  /**
+   * More documentation.
+   */
   virtual const char* FullDocumentation()
     {
-      return
-        "Set the name for the library in this makefile.  \n"
-        "This takes one argument.\n"
-        "LIBRARY(libraryname);\n"
-        "There can be only one library per CMakeLists.txt file.\n";
+    return
+      "WIN32_LIBRARIES(library -lm ...)";
     }
 };