diff --git a/src/commands/CMakeLists.txt b/src/commands/CMakeLists.txt
index 6fc68bf2..c0ca647a 100644
--- a/src/commands/CMakeLists.txt
+++ b/src/commands/CMakeLists.txt
@@ -23,6 +23,7 @@ set (commands_SRCS CmdCancel.cpp
                    CmdStart.cpp
                    CmdStop.cpp
                    CmdReportSummary.cpp
+                   CmdShow.cpp
                    CmdTags.cpp
                    CmdTrack.cpp
                    CmdUndo.cpp)
diff --git a/src/commands/CmdShow.cpp b/src/commands/CmdShow.cpp
new file mode 100644
index 00000000..e4a5abf0
--- /dev/null
+++ b/src/commands/CmdShow.cpp
@@ -0,0 +1,87 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2015 - 2016, Paul Beckingham, Federico Hernandez.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// http://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include <cmake.h>
+#include <shared.h>
+#include <timew.h>
+#include <algorithm>
+#include <iostream>
+
+////////////////////////////////////////////////////////////////////////////////
+int CmdShow (Rules& rules)
+{
+  // Obtain and sort the names. Sorting is critical.
+  auto names = rules.all ();
+  std::sort (names.begin (), names.end ());
+
+  std::vector <std::string> previous {};
+  for (auto& name : rules.all ())
+  {
+    if (name.substr (0, 5) == "temp.")
+      continue;
+
+    auto parts = split (name, '.');
+    for (unsigned int i = 0; i < parts.size (); ++i)
+    {
+      // The last part is special.
+      if (i == parts.size () - 1)
+      {
+        if (previous.size () > 1 &&
+            parts.size () == 1)
+          std::cout << '\n';
+
+        std::cout << std::string (2 * (parts.size () - 1), ' ')
+                  << parts[i]
+                  << " = "
+                  << rules.get (name)
+                  << "\n";
+      }
+      else
+      {
+        if (previous.size () <= i ||
+            previous[i] != parts[i])
+        {
+          if (i == 0)
+          {
+            std::cout << '\n';
+            if (rules.isRuleType (parts[0]))
+              std::cout << "define ";
+          }
+
+          std::cout << std::string (2 * i, ' ')
+                    << parts[i]
+                    << ":\n";
+        }
+      }
+    }
+
+    previous = parts;
+  }
+
+  return 0;
+}
+
+////////////////////////////////////////////////////////////////////////////////
diff --git a/src/commands/commands.h b/src/commands/commands.h
index 9b6e53d2..68b10e6f 100644
--- a/src/commands/commands.h
+++ b/src/commands/commands.h
@@ -45,6 +45,7 @@ int CmdHelpUsage     (                                                );
 int CmdHelp          (const CLI&                                      );
 int CmdImport        (                                                );
 int CmdReport        (const CLI&, Rules&, Database&, const Extensions&);
+int CmdShow          (            Rules&                              );
 int CmdStart         (const CLI&, Rules&, Database&                   );
 int CmdStop          (const CLI&, Rules&, Database&                   );
 int CmdTags          (            Rules&, Database&                   );