diff --git a/extensions/rdf-exporter/module/MOD-INF/controller.js b/extensions/rdf-exporter/module/MOD-INF/controller.js
index 5f76e4287..f81b3a7d7 100755
--- a/extensions/rdf-exporter/module/MOD-INF/controller.js
+++ b/extensions/rdf-exporter/module/MOD-INF/controller.js
@@ -40,13 +40,13 @@ function init() {
      *  Commands
      */
     var GridworksServlet = Packages.com.google.gridworks.GridworksServlet;
-    GridworksServlet.registerCommand("save-rdf-schema", new SaveRdfSchemaCommand());
-    GridworksServlet.registerCommand("preview-rdf",new PreviewRdfCommand());
-    GridworksServlet.registerCommand("save-baseURI",new SaveBaseURI());
-    GridworksServlet.registerCommand("suggest-term",new SuggestTermCommand());
-    GridworksServlet.registerCommand("import-vocabulary",new ImportVocabularyCommand());
-    GridworksServlet.registerCommand("list-vocabularies",new ListVocabulariesCommand());
-    GridworksServlet.registerCommand("delete-vocabulary",new DeleteVocabularyCommand());
+    GridworksServlet.registerCommand(module, "save-rdf-schema", new SaveRdfSchemaCommand());
+    GridworksServlet.registerCommand(module, "preview-rdf", new PreviewRdfCommand());
+    GridworksServlet.registerCommand(module, "save-baseURI", new SaveBaseURI());
+    GridworksServlet.registerCommand(module, "suggest-term", new SuggestTermCommand());
+    GridworksServlet.registerCommand(module, "import-vocabulary", new ImportVocabularyCommand());
+    GridworksServlet.registerCommand(module, "list-vocabularies", new ListVocabulariesCommand());
+    GridworksServlet.registerCommand(module, "delete-vocabulary", new DeleteVocabularyCommand());
         
     /*
      *  Client-side Resources
diff --git a/extensions/rdf-exporter/module/scripts/menu-bar-extensions.js b/extensions/rdf-exporter/module/scripts/menu-bar-extensions.js
index b487965a1..92d5a9f35 100644
--- a/extensions/rdf-exporter/module/scripts/menu-bar-extensions.js
+++ b/extensions/rdf-exporter/module/scripts/menu-bar-extensions.js
@@ -46,7 +46,7 @@ RdfExporterMenuBar.rdfExportRows = function(format, ext) {
     $(form)
         .css("display", "none")
         .attr("method", "post")
-        .attr("action", "/command/export-rows/" + name + "." + ext)
+        .attr("action", "/command/core/export-rows/" + name + "." + ext)
         .attr("target", "gridworks-export");
 
     $('<input />')
diff --git a/extensions/rdf-exporter/module/scripts/rdf-schema-alignment-ui-node.js b/extensions/rdf-exporter/module/scripts/rdf-schema-alignment-ui-node.js
index dc3cc7260..76e08ade9 100755
--- a/extensions/rdf-exporter/module/scripts/rdf-schema-alignment-ui-node.js
+++ b/extensions/rdf-exporter/module/scripts/rdf-schema-alignment-ui-node.js
@@ -808,7 +808,7 @@ RdfSchemaAlignmentDialog.RdfResourceDialog = function(elmt,lookFor,onDone,defaul
 	});*/
 	//Autocomplete
 	/*elmts.newResourceUri.autoComplete({
-		script:'/command/search-vocabularies?type=' + lookFor + '&',
+		script:'/command/rdf-exporter-extension/search-vocabularies?type=' + lookFor + '&',
 		varname:'input',
 		json:true,
 		shownoresults:true,
diff --git a/extensions/rdf-exporter/module/scripts/rdf-schema-alignment.js b/extensions/rdf-exporter/module/scripts/rdf-schema-alignment.js
index d3317f4e9..b029c5709 100755
--- a/extensions/rdf-exporter/module/scripts/rdf-schema-alignment.js
+++ b/extensions/rdf-exporter/module/scripts/rdf-schema-alignment.js
@@ -41,6 +41,7 @@ RdfSchemaAlignmentDialog.prototype._constructFooter = function(footer) {
     $('<button></button>').html("&nbsp;&nbsp;OK&nbsp;&nbsp;").click(function() {
     	var schema = self.getJSON();
     	Gridworks.postProcess(
+    	        "rdf-exporter-extension",
                 "save-rdf-schema",
                 {},
                 { schema: JSON.stringify(schema) },
@@ -100,7 +101,7 @@ RdfSchemaAlignmentDialog.prototype._previewRdf = function(){
 	var schema = this.getJSON();
 	self._previewPane.empty().html('<img src="images/large-spinner.gif" title="loading..."/>');
 	$.post(
-	    "/command/preview-rdf?" + $.param({ project: theProject.id }),
+	    "/command/rdf-exporter-extension/preview-rdf?" + $.param({ project: theProject.id }),
         { schema: JSON.stringify(schema), engine: JSON.stringify(ui.browsingEngine.getJSON()) },
         function(data) {
         	self._previewPane.empty();
@@ -160,7 +161,7 @@ RdfSchemaAlignmentDialog.prototype._listVocabularies = function(){
 	self._renderVocabularyFooter();
 	
 	
-	$.get("/command/list-vocabularies",{},function(o){
+	$.get("/command/rdf-exporter-extension/list-vocabularies",{},function(o){
 		var vocab_table = $('<table></table>').width('100%').addClass('data-table')[0];
 		var tr = vocab_table.insertRow(vocab_table.rows.length);
 		$(tr).addClass('');
@@ -212,7 +213,7 @@ RdfSchemaAlignmentDialog.prototype._renderVocabularyFooter = function(){
     		return ;
     	}
 		var dismissBusy = DialogSystem.showBusy('Importing vocabulary from: ' + url);
-    	$.get("/command/import-vocabulary",{prefix:prefix,namespace:namespace,url:url},function(data){
+    	$.get("/command/rdf-exporter-extension/import-vocabulary",{prefix:prefix,namespace:namespace,url:url},function(data){
     		dismissBusy();
     		if (data.code === "error"){
     			alert('Error:' + data.message)
@@ -228,7 +229,7 @@ RdfSchemaAlignmentDialog.prototype._renderVocabularyFooter = function(){
 RdfSchemaAlignmentDialog.prototype._deleteVocabulary = function(uri){
 	var self = this;
 	var dismissBusy = DialogSystem.showBusy('Deleteing vocabulary: ' + uri);
-	$.post("/command/delete-vocabulary",{uri:uri},function(data){
+	$.post("/command/rdf-exporter-extension/delete-vocabulary",{uri:uri},function(data){
 		dismissBusy();
 		if (data.code === "error"){
 			alert('Error:' + data.message)
@@ -289,7 +290,7 @@ RdfSchemaAlignmentDialog.prototype._editBaseUri = function(src){
 RdfSchemaAlignmentDialog.prototype._replaceBaseUri = function(newBaseUri){
 	var self = this;
 	RdfSchemaAlignment._defaultNamespace = newBaseUri;
-	$.post("/command/save-baseURI?" + $.param({project: theProject.id }),{baseURI:newBaseUri},function(data){
+	$.post("/command/rdf-exporter-extension/save-baseURI?" + $.param({project: theProject.id }),{baseURI:newBaseUri},function(data){
 		if (data.code === "error"){
 			alert('Error:' + data.message)
 		}else{
diff --git a/extensions/rdf-exporter/module/scripts/suggestterm.suggest.js b/extensions/rdf-exporter/module/scripts/suggestterm.suggest.js
index 16a71a6d8..59430a019 100755
--- a/extensions/rdf-exporter/module/scripts/suggestterm.suggest.js
+++ b/extensions/rdf-exporter/module/scripts/suggestterm.suggest.js
@@ -74,7 +74,7 @@
      $.extend($.suggest.suggestterm, {
          defaults:  $.extend(true, {}, $.suggest.suggest.defaults, {
              service_url: "",
-             service_path: "/command/suggest-term",
+             service_path: "/command/rdf-exporter-extension/suggest-term",
              type_strict:"classes",
              suggest_new:"Add it"
          })
diff --git a/gridworks b/gridworks
index d9e5cfa1f..373f40f99 100755
--- a/gridworks
+++ b/gridworks
@@ -218,7 +218,7 @@ tool_download() {
 load_data() {
     FILE=$1
     NAME=$2
-    URL="http://${GRIDWORKS_HOST}:${GRIDWORKS_PORT}/command/create-project-from-upload"
+    URL="http://${GRIDWORKS_HOST}:${GRIDWORKS_PORT}/command/core/create-project-from-upload"
     CURL="`which curl 2> /dev/null`"
     
     if [ -z "$CURL" ]; then
diff --git a/main/src/com/google/gridworks/GridworksServlet.java b/main/src/com/google/gridworks/GridworksServlet.java
index 864dba6e4..865d69aa0 100644
--- a/main/src/com/google/gridworks/GridworksServlet.java
+++ b/main/src/com/google/gridworks/GridworksServlet.java
@@ -19,6 +19,7 @@ import com.google.gridworks.commands.Command;
 import com.google.gridworks.io.FileProjectManager;
 
 import edu.mit.simile.butterfly.Butterfly;
+import edu.mit.simile.butterfly.ButterflyModule;
 
 public class GridworksServlet extends Butterfly {
 
@@ -38,93 +39,6 @@ public class GridworksServlet extends Butterfly {
 
     final static Logger logger = LoggerFactory.getLogger("gridworks");
 
-    // TODO: This belongs in an external config file somewhere
-    private static final String[][] commandNames = {
-        {"create-project-from-upload", "com.google.gridworks.commands.project.CreateProjectCommand"},
-        {"import-project", "com.google.gridworks.commands.project.ImportProjectCommand"},
-        {"export-project", "com.google.gridworks.commands.project.ExportProjectCommand"},
-        {"export-rows", "com.google.gridworks.commands.project.ExportRowsCommand"},
-
-        {"get-project-metadata", "com.google.gridworks.commands.project.GetProjectMetadataCommand"},
-        {"get-all-project-metadata", "com.google.gridworks.commands.workspace.GetAllProjectMetadataCommand"},
-
-        {"delete-project", "com.google.gridworks.commands.project.DeleteProjectCommand"},
-        {"rename-project", "com.google.gridworks.commands.project.RenameProjectCommand"},
-
-        {"get-models", "com.google.gridworks.commands.project.GetModelsCommand"},
-        {"get-rows", "com.google.gridworks.commands.row.GetRowsCommand"},
-        {"get-processes", "com.google.gridworks.commands.history.GetProcessesCommand"},
-        {"get-history", "com.google.gridworks.commands.history.GetHistoryCommand"},
-        {"get-operations", "com.google.gridworks.commands.history.GetOperationsCommand"},
-        {"get-columns-info", "com.google.gridworks.commands.column.GetColumnsInfoCommand"},
-        {"get-scatterplot", "com.google.gridworks.commands.browsing.GetScatterplotCommand"},
-
-        {"undo-redo", "com.google.gridworks.commands.history.UndoRedoCommand"},
-        {"apply-operations", "com.google.gridworks.commands.history.ApplyOperationsCommand"},
-        {"cancel-processes", "com.google.gridworks.commands.history.CancelProcessesCommand"},
-
-        {"compute-facets", "com.google.gridworks.commands.browsing.ComputeFacetsCommand"},
-        {"compute-clusters", "com.google.gridworks.commands.browsing.ComputeClustersCommand"},
-
-        {"edit-one-cell", "com.google.gridworks.commands.cell.EditOneCellCommand"},
-        {"text-transform", "com.google.gridworks.commands.cell.TextTransformCommand"},
-        {"mass-edit", "com.google.gridworks.commands.cell.MassEditCommand"},
-        {"join-multi-value-cells", "com.google.gridworks.commands.cell.JoinMultiValueCellsCommand"},
-        {"split-multi-value-cells", "com.google.gridworks.commands.cell.SplitMultiValueCellsCommand"},
-        {"fill-down", "com.google.gridworks.commands.cell.FillDownCommand"},
-        {"blank-down", "com.google.gridworks.commands.cell.BlankDownCommand"},
-        {"transpose-columns-into-rows", "com.google.gridworks.commands.cell.TransposeColumnsIntoRowsCommand"},
-        {"transpose-rows-into-columns", "com.google.gridworks.commands.cell.TransposeRowsIntoColumnsCommand"},
-
-        {"add-column", "com.google.gridworks.commands.column.AddColumnCommand"},
-        {"remove-column", "com.google.gridworks.commands.column.RemoveColumnCommand"},
-        {"rename-column", "com.google.gridworks.commands.column.RenameColumnCommand"},
-        {"move-column", "com.google.gridworks.commands.column.MoveColumnCommand"},
-        {"split-column", "com.google.gridworks.commands.column.SplitColumnCommand"},
-        {"extend-data", "com.google.gridworks.commands.column.ExtendDataCommand"},
-
-        {"denormalize", "com.google.gridworks.commands.row.DenormalizeCommand"},
-
-        {"reconcile", "com.google.gridworks.commands.recon.ReconcileCommand"},
-        {"recon-match-best-candidates", "com.google.gridworks.commands.recon.ReconMatchBestCandidatesCommand"},
-        {"recon-mark-new-topics", "com.google.gridworks.commands.recon.ReconMarkNewTopicsCommand"},
-        {"recon-discard-judgments", "com.google.gridworks.commands.recon.ReconDiscardJudgmentsCommand"},
-        {"recon-match-specific-topic-to-cells", "com.google.gridworks.commands.recon.ReconMatchSpecificTopicCommand"},
-        {"recon-judge-one-cell", "com.google.gridworks.commands.recon.ReconJudgeOneCellCommand"},
-        {"recon-judge-similar-cells", "com.google.gridworks.commands.recon.ReconJudgeSimilarCellsCommand"},
-
-        {"annotate-one-row", "com.google.gridworks.commands.row.AnnotateOneRowCommand"},
-        {"annotate-rows", "com.google.gridworks.commands.row.AnnotateRowsCommand"},
-        {"remove-rows", "com.google.gridworks.commands.row.RemoveRowsCommand"},
-        {"reorder-rows", "com.google.gridworks.commands.row.ReorderRowsCommand"},
-
-        {"save-protograph", "com.google.gridworks.commands.freebase.SaveProtographCommand"},
-
-        {"get-expression-language-info", "com.google.gridworks.commands.expr.GetExpressionLanguageInfoCommand"},
-        {"get-expression-history", "com.google.gridworks.commands.expr.GetExpressionHistoryCommand"},
-        {"log-expression", "com.google.gridworks.commands.expr.LogExpressionCommand"},
-
-        {"preview-expression", "com.google.gridworks.commands.expr.PreviewExpressionCommand"},
-        {"preview-extend-data", "com.google.gridworks.commands.column.PreviewExtendDataCommand"},
-        {"preview-protograph", "com.google.gridworks.commands.freebase.PreviewProtographCommand"},
-
-        {"guess-types-of-column", "com.google.gridworks.commands.freebase.GuessTypesOfColumnCommand"},
-
-        {"check-authorization", "com.google.gridworks.commands.auth.CheckAuthorizationCommand"},
-        {"authorize", "com.google.gridworks.commands.auth.AuthorizeCommand"},
-        {"deauthorize", "com.google.gridworks.commands.auth.DeAuthorizeCommand"},
-        {"user-badges", "com.google.gridworks.commands.auth.GetUserBadgesCommand"},
-
-        {"upload-data", "com.google.gridworks.commands.freebase.UploadDataCommand"},
-        {"import-qa-data", "com.google.gridworks.commands.freebase.ImportQADataCommand"},
-        {"mqlread", "com.google.gridworks.commands.freebase.MQLReadCommand"},
-        {"mqlwrite", "com.google.gridworks.commands.freebase.MQLWriteCommand"},
-        
-        {"get-preference", "com.google.gridworks.commands.GetPreferenceCommand"},
-        {"get-all-preferences", "com.google.gridworks.commands.GetAllPreferencesCommand"},
-        {"set-preference", "com.google.gridworks.commands.SetPreferenceCommand"},
-    };
-
     public static String getVersion() {
         return VERSION;
     }
@@ -159,8 +73,6 @@ public class GridworksServlet extends Butterfly {
             throw new ServletException("can't find servlet init config 'gridworks.data', I have to give up initializing");
         }
 
-        registerCommands(commandNames);
-
         s_dataDir = new File(data);
         FileProjectManager.initialize(s_dataDir);
 
@@ -195,18 +107,18 @@ public class GridworksServlet extends Butterfly {
 
     @Override
     public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-        if (request.getPathInfo().startsWith("/command")) {
-            String commandName = getCommandName(request);
-            Command command = commands.get(commandName);
+        if (request.getPathInfo().startsWith("/command/")) {
+            String commandKey = getCommandKey(request);
+            Command command = commands.get(commandKey);
             if (command != null) {
                 if (request.getMethod().equals("GET")) {
-                    logger.trace("> GET {}", commandName);
+                    logger.trace("> GET {}", commandKey);
                     command.doGet(request, response);
-                    logger.trace("< GET {}", commandName);
+                    logger.trace("< GET {}", commandKey);
                 } else if (request.getMethod().equals("POST")) {
-                    logger.trace("> POST {}", commandName);
+                    logger.trace("> POST {}", commandKey);
                     command.doPost(request, response);
-                    logger.trace("< POST {}", commandName);
+                    logger.trace("< POST {}", commandKey);
                 } else {
                     response.sendError(405);
                 }
@@ -218,13 +130,20 @@ public class GridworksServlet extends Butterfly {
         }
     }
 
-    protected String getCommandName(HttpServletRequest request) {
-        // Remove extraneous path segments that might be there for other purposes,
-        // e.g., for /export-rows/filename.ext, export-rows is the command while
-        // filename.ext is only for the browser to prompt a convenient filename.
-        String commandName = request.getPathInfo().substring("/command/".length());
-        int slash = commandName.indexOf('/');
-        return slash > 0 ? commandName.substring(0, slash) : commandName;
+    protected String getCommandKey(HttpServletRequest request) {
+        // A command path has this format: /command/module-name/command-name/...
+        
+        String path = request.getPathInfo().substring("/command/".length());
+        
+        int slash1 = path.indexOf('/');
+        if (slash1 >= 0) {
+            int slash2 = path.indexOf('/', slash1 + 1);
+            if (slash2 > 0) {
+                path = path.substring(0, slash2);
+            }
+        }
+        
+        return path;
     }
 
     private File tempDir = null;
@@ -253,71 +172,33 @@ public class GridworksServlet extends Butterfly {
     public String getConfiguration(String name, String def) {
         return null;
     }
-
-    /**
-     * Register an array of commands
-     *
-     * @param commands
-     *            An array of arrays containing pairs of strings with the
-     *            command name in the first element of the tuple and the fully
-     *            qualified class name of the class implementing the command in
-     *            the second.
-     * @return false if any commands failed to load
-     */
-    private boolean registerCommands(String[][] commands) {
-        boolean status = true;
-        for (String[] command : commandNames) {
-            String commandName = command[0];
-            String className = command[1];
-            status |= registerOneCommand(commandName, className);
-        }
-        return status;
-    }
     
     /**
-     * Register a single command given its class name.
+     * Register a single command.
      *
-     * @param name
-     *            command verb for command
-     * @param className
-     *            class name of command class
+     * @param module the module the command belongs to
+     * @param name command verb for command
+     * @param commandObject object implementing the command
      * @return true if command was loaded and registered successfully
      */
-    protected boolean registerOneCommand(String commandName, String className) {
-        logger.debug("Loading command " + commandName + " class: " + className);
-        Command cmd;
-        try {
-            cmd = (Command) this.getClass().getClassLoader().loadClass(className).newInstance();
-            
-            return registerOneCommand(commandName, cmd);
-        } catch (InstantiationException e) {
-            logger.error("Failed to load command class " + className, e);
-            return false;
-        } catch (IllegalAccessException e) {
-            logger.error("Failed to load command class " + className, e);
-            return false;
-        } catch (ClassNotFoundException e) {
-            logger.error("Failed to load command class " + className, e);
-            return false;
-        }
+    protected boolean registerOneCommand(ButterflyModule module, String name, Command commandObject) {
+        return registerOneCommand(module.getName() + "/" + name, commandObject);
     }
     
     /**
      * Register a single command.
      *
-     * @param name
-     *            command verb for command
-     * @param commandObject
-     *            object implementing the command
+     * @param path path for command
+     * @param commandObject object implementing the command
      * @return true if command was loaded and registered successfully
      */
-    protected boolean registerOneCommand(String name, Command commandObject) {
-        if (commands.containsKey(name)) {
+    protected boolean registerOneCommand(String path, Command commandObject) {
+        if (commands.containsKey(path)) {
             return false;
         }
         
         commandObject.init(this);
-        commands.put(name, commandObject);
+        commands.put(path, commandObject);
         
         return true;
     }
@@ -330,15 +211,14 @@ public class GridworksServlet extends Butterfly {
     /**
      * Register a single command. Used by extensions.
      *
-     * @param name
-     *            command verb for command
-     * @param commandObject
-     *            object implementing the command
+     * @param module the module the command belongs to
+     * @param name command verb for command
+     * @param commandObject object implementing the command
      *            
      * @return true if command was loaded and registered successfully
      */
-    static public boolean registerCommand(String commandName, Command commandObject) {
-        return s_singleton.registerOneCommand(commandName, commandObject);
+    static public boolean registerCommand(ButterflyModule module, String commandName, Command commandObject) {
+        return s_singleton.registerOneCommand(module, commandName, commandObject);
     }
     
     static public Class<?> getClass(String className) throws ClassNotFoundException {
@@ -347,5 +227,4 @@ public class GridworksServlet extends Butterfly {
         }
         return Class.forName(className);
     }
-}
-
+}
\ No newline at end of file
diff --git a/main/src/com/google/gridworks/commands/auth/AuthorizeCommand.java b/main/src/com/google/gridworks/commands/auth/AuthorizeCommand.java
index 8be8d62e2..7a23a4207 100644
--- a/main/src/com/google/gridworks/commands/auth/AuthorizeCommand.java
+++ b/main/src/com/google/gridworks/commands/auth/AuthorizeCommand.java
@@ -129,6 +129,6 @@ public class AuthorizeCommand extends Command {
                 throw new RuntimeException("neither the 'host' nor 'referer' headers were present in the HTTP response, I can't determine what URL gridworks is listening to.");
             }
         }
-        return "http://" + host + "/command/authorize/" + provider.getHost();
+        return "http://" + host + "/command/core/authorize/" + provider.getHost();
     }
 }
diff --git a/main/tests/server/src/com/google/gridworks/tests/GridworksServletStub.java b/main/tests/server/src/com/google/gridworks/tests/GridworksServletStub.java
index 3595440a8..345dd761e 100644
--- a/main/tests/server/src/com/google/gridworks/tests/GridworksServletStub.java
+++ b/main/tests/server/src/com/google/gridworks/tests/GridworksServletStub.java
@@ -23,7 +23,7 @@ public class GridworksServletStub extends GridworksServlet {
     }
 
     public String wrapGetCommandName(HttpServletRequest request){
-        return super.getCommandName(request);
+        return super.getCommandKey(request);
     }
 
     //-------------------helper methods--------------
@@ -32,8 +32,8 @@ public class GridworksServletStub extends GridworksServlet {
      * @param commandName
      * @param command
      */
-    public void insertCommand( String commandName, Command command ){
-        registerCommand(commandName, command);
+    public void insertCommand(String commandName, Command command ){
+        registerOneCommand("core/" + commandName, command);
     }
 
     /**
diff --git a/main/tests/server/src/com/google/gridworks/tests/GridworksServletTests.java b/main/tests/server/src/com/google/gridworks/tests/GridworksServletTests.java
index 9a246061a..7f56e10f9 100644
--- a/main/tests/server/src/com/google/gridworks/tests/GridworksServletTests.java
+++ b/main/tests/server/src/com/google/gridworks/tests/GridworksServletTests.java
@@ -32,7 +32,7 @@ public class GridworksServletTests extends GridworksTest {
 
     //variables
     final static private String TEST_COMMAND_NAME = "test-command";
-    final static private String TEST_COMMAND_PATH = "/command/test-command/foobar";
+    final static private String TEST_COMMAND_PATH = "/command/core/test-command/foobar";
     final static private String BAD_COMMAND_PATH = "/command-does-not-exist";
 
     final static private String POST = "POST";
diff --git a/main/webapp/modules/core/MOD-INF/controller.js b/main/webapp/modules/core/MOD-INF/controller.js
index 9a0e1c0d2..033ac1789 100644
--- a/main/webapp/modules/core/MOD-INF/controller.js
+++ b/main/webapp/modules/core/MOD-INF/controller.js
@@ -10,12 +10,102 @@ var templatedFiles = {
     "preferences" : true
 };
 
+function registerCommands() {
+    var GS = Packages.com.google.gridworks.GridworksServlet;
+    
+    GS.registerCommand(module, "create-project-from-upload", new Packages.com.google.gridworks.commands.project.CreateProjectCommand());
+    GS.registerCommand(module, "import-project", new Packages.com.google.gridworks.commands.project.ImportProjectCommand());
+    GS.registerCommand(module, "export-project", new Packages.com.google.gridworks.commands.project.ExportProjectCommand());
+    GS.registerCommand(module, "export-rows", new Packages.com.google.gridworks.commands.project.ExportRowsCommand());
+
+    GS.registerCommand(module, "get-project-metadata", new Packages.com.google.gridworks.commands.project.GetProjectMetadataCommand());
+    GS.registerCommand(module, "get-all-project-metadata", new Packages.com.google.gridworks.commands.workspace.GetAllProjectMetadataCommand());
+
+    GS.registerCommand(module, "delete-project", new Packages.com.google.gridworks.commands.project.DeleteProjectCommand());
+    GS.registerCommand(module, "rename-project", new Packages.com.google.gridworks.commands.project.RenameProjectCommand());
+
+    GS.registerCommand(module, "get-models", new Packages.com.google.gridworks.commands.project.GetModelsCommand());
+    GS.registerCommand(module, "get-rows", new Packages.com.google.gridworks.commands.row.GetRowsCommand());
+    GS.registerCommand(module, "get-processes", new Packages.com.google.gridworks.commands.history.GetProcessesCommand());
+    GS.registerCommand(module, "get-history", new Packages.com.google.gridworks.commands.history.GetHistoryCommand());
+    GS.registerCommand(module, "get-operations", new Packages.com.google.gridworks.commands.history.GetOperationsCommand());
+    GS.registerCommand(module, "get-columns-info", new Packages.com.google.gridworks.commands.column.GetColumnsInfoCommand());
+    GS.registerCommand(module, "get-scatterplot", new Packages.com.google.gridworks.commands.browsing.GetScatterplotCommand());
+
+    GS.registerCommand(module, "undo-redo", new Packages.com.google.gridworks.commands.history.UndoRedoCommand());
+    GS.registerCommand(module, "apply-operations", new Packages.com.google.gridworks.commands.history.ApplyOperationsCommand());
+    GS.registerCommand(module, "cancel-processes", new Packages.com.google.gridworks.commands.history.CancelProcessesCommand());
+
+    GS.registerCommand(module, "compute-facets", new Packages.com.google.gridworks.commands.browsing.ComputeFacetsCommand());
+    GS.registerCommand(module, "compute-clusters", new Packages.com.google.gridworks.commands.browsing.ComputeClustersCommand());
+
+    GS.registerCommand(module, "edit-one-cell", new Packages.com.google.gridworks.commands.cell.EditOneCellCommand());
+    GS.registerCommand(module, "text-transform", new Packages.com.google.gridworks.commands.cell.TextTransformCommand());
+    GS.registerCommand(module, "mass-edit", new Packages.com.google.gridworks.commands.cell.MassEditCommand());
+    GS.registerCommand(module, "join-multi-value-cells", new Packages.com.google.gridworks.commands.cell.JoinMultiValueCellsCommand());
+    GS.registerCommand(module, "split-multi-value-cells", new Packages.com.google.gridworks.commands.cell.SplitMultiValueCellsCommand());
+    GS.registerCommand(module, "fill-down", new Packages.com.google.gridworks.commands.cell.FillDownCommand());
+    GS.registerCommand(module, "blank-down", new Packages.com.google.gridworks.commands.cell.BlankDownCommand());
+    GS.registerCommand(module, "transpose-columns-into-rows", new Packages.com.google.gridworks.commands.cell.TransposeColumnsIntoRowsCommand());
+    GS.registerCommand(module, "transpose-rows-into-columns", new Packages.com.google.gridworks.commands.cell.TransposeRowsIntoColumnsCommand());
+
+    GS.registerCommand(module, "add-column", new Packages.com.google.gridworks.commands.column.AddColumnCommand());
+    GS.registerCommand(module, "remove-column", new Packages.com.google.gridworks.commands.column.RemoveColumnCommand());
+    GS.registerCommand(module, "rename-column", new Packages.com.google.gridworks.commands.column.RenameColumnCommand());
+    GS.registerCommand(module, "move-column", new Packages.com.google.gridworks.commands.column.MoveColumnCommand());
+    GS.registerCommand(module, "split-column", new Packages.com.google.gridworks.commands.column.SplitColumnCommand());
+    GS.registerCommand(module, "extend-data", new Packages.com.google.gridworks.commands.column.ExtendDataCommand());
+
+    GS.registerCommand(module, "denormalize", new Packages.com.google.gridworks.commands.row.DenormalizeCommand());
+
+    GS.registerCommand(module, "reconcile", new Packages.com.google.gridworks.commands.recon.ReconcileCommand());
+    GS.registerCommand(module, "recon-match-best-candidates", new Packages.com.google.gridworks.commands.recon.ReconMatchBestCandidatesCommand());
+    GS.registerCommand(module, "recon-mark-new-topics", new Packages.com.google.gridworks.commands.recon.ReconMarkNewTopicsCommand());
+    GS.registerCommand(module, "recon-discard-judgments", new Packages.com.google.gridworks.commands.recon.ReconDiscardJudgmentsCommand());
+    GS.registerCommand(module, "recon-match-specific-topic-to-cells", new Packages.com.google.gridworks.commands.recon.ReconMatchSpecificTopicCommand());
+    GS.registerCommand(module, "recon-judge-one-cell", new Packages.com.google.gridworks.commands.recon.ReconJudgeOneCellCommand());
+    GS.registerCommand(module, "recon-judge-similar-cells", new Packages.com.google.gridworks.commands.recon.ReconJudgeSimilarCellsCommand());
+
+    GS.registerCommand(module, "annotate-one-row", new Packages.com.google.gridworks.commands.row.AnnotateOneRowCommand());
+    GS.registerCommand(module, "annotate-rows", new Packages.com.google.gridworks.commands.row.AnnotateRowsCommand());
+    GS.registerCommand(module, "remove-rows", new Packages.com.google.gridworks.commands.row.RemoveRowsCommand());
+    GS.registerCommand(module, "reorder-rows", new Packages.com.google.gridworks.commands.row.ReorderRowsCommand());
+
+    GS.registerCommand(module, "save-protograph", new Packages.com.google.gridworks.commands.freebase.SaveProtographCommand());
+
+    GS.registerCommand(module, "get-expression-language-info", new Packages.com.google.gridworks.commands.expr.GetExpressionLanguageInfoCommand());
+    GS.registerCommand(module, "get-expression-history", new Packages.com.google.gridworks.commands.expr.GetExpressionHistoryCommand());
+    GS.registerCommand(module, "log-expression", new Packages.com.google.gridworks.commands.expr.LogExpressionCommand());
+
+    GS.registerCommand(module, "preview-expression", new Packages.com.google.gridworks.commands.expr.PreviewExpressionCommand());
+    GS.registerCommand(module, "preview-extend-data", new Packages.com.google.gridworks.commands.column.PreviewExtendDataCommand());
+    GS.registerCommand(module, "preview-protograph", new Packages.com.google.gridworks.commands.freebase.PreviewProtographCommand());
+
+    GS.registerCommand(module, "guess-types-of-column", new Packages.com.google.gridworks.commands.freebase.GuessTypesOfColumnCommand());
+
+    GS.registerCommand(module, "check-authorization", new Packages.com.google.gridworks.commands.auth.CheckAuthorizationCommand());
+    GS.registerCommand(module, "authorize", new Packages.com.google.gridworks.commands.auth.AuthorizeCommand());
+    GS.registerCommand(module, "deauthorize", new Packages.com.google.gridworks.commands.auth.DeAuthorizeCommand());
+    GS.registerCommand(module, "user-badges", new Packages.com.google.gridworks.commands.auth.GetUserBadgesCommand());
+
+    GS.registerCommand(module, "upload-data", new Packages.com.google.gridworks.commands.freebase.UploadDataCommand());
+    GS.registerCommand(module, "import-qa-data", new Packages.com.google.gridworks.commands.freebase.ImportQADataCommand());
+    GS.registerCommand(module, "mqlread", new Packages.com.google.gridworks.commands.freebase.MQLReadCommand());
+    GS.registerCommand(module, "mqlwrite", new Packages.com.google.gridworks.commands.freebase.MQLWriteCommand());
+
+    GS.registerCommand(module, "get-preference", new Packages.com.google.gridworks.commands.GetPreferenceCommand());
+    GS.registerCommand(module, "get-all-preferences", new Packages.com.google.gridworks.commands.GetAllPreferencesCommand());
+    GS.registerCommand(module, "set-preference", new Packages.com.google.gridworks.commands.SetPreferenceCommand());
+}
+
 /*
  *  This optional function is invoked from the module's init() Java function.
  */
 function init() {
     // Packages.java.lang.System.err.println("Initializing by script " + module);
     
+    registerCommands();
+    
     ClientSideResourceManager.addPaths(
         "project/scripts",
         module,
diff --git a/main/webapp/modules/core/index.html b/main/webapp/modules/core/index.html
index 413d99847..ed1962fd5 100644
--- a/main/webapp/modules/core/index.html
+++ b/main/webapp/modules/core/index.html
@@ -55,7 +55,7 @@
 
           <td id="forms">
             <div class="island">
-              <form id="file-upload-form" method="post" enctype="multipart/form-data" action="/command/create-project-from-upload" accept-charset="UTF-8">
+              <form id="file-upload-form" method="post" enctype="multipart/form-data" action="/command/core/create-project-from-upload" accept-charset="UTF-8">
 
                 <div id="form-tabs-create-project" class="round-corners">
                   <a class="form-tab-link" href="javascript:showHide('file-upload-form', 'project-upload-form')">or Import an Existing Project</a>
@@ -120,7 +120,7 @@
               </form>
 
 
-              <form id="project-upload-form" method="post" enctype="multipart/form-data" action="/command/import-project" accept-charset="UTF-8" style="display:none;">
+              <form id="project-upload-form" method="post" enctype="multipart/form-data" action="/command/core/import-project" accept-charset="UTF-8" style="display:none;">
                 <div id="form-tabs-import-project" class="round-corners">
                   <a class="form-tab-link" href="javascript:showHide('project-upload-form', 'file-upload-form')">or Create a New Project</a>
                   <h1>Import an Existing Project</h1>
diff --git a/main/webapp/modules/core/scripts/dialogs/clustering-dialog.js b/main/webapp/modules/core/scripts/dialogs/clustering-dialog.js
index 1461940ea..399c64060 100644
--- a/main/webapp/modules/core/scripts/dialogs/clustering-dialog.js
+++ b/main/webapp/modules/core/scripts/dialogs/clustering-dialog.js
@@ -202,7 +202,7 @@ ClusteringDialog.prototype._cluster = function() {
     this._elmts.resultSummary.empty();
 
     $.post(
-        "/command/compute-clusters?" + $.param({ project: theProject.id }),
+        "/command/core/compute-clusters?" + $.param({ project: theProject.id }),
         { 
             engine: JSON.stringify(ui.browsingEngine.getJSON()), 
             clusterer: JSON.stringify({ 
@@ -293,7 +293,7 @@ ClusteringDialog.prototype._apply = function(onDone) {
     }
     
     if (edits.length > 0) {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "mass-edit",
             {},
             {
diff --git a/main/webapp/modules/core/scripts/dialogs/expression-preview-dialog.js b/main/webapp/modules/core/scripts/dialogs/expression-preview-dialog.js
index ae2d17775..2e001a9e6 100644
--- a/main/webapp/modules/core/scripts/dialogs/expression-preview-dialog.js
+++ b/main/webapp/modules/core/scripts/dialogs/expression-preview-dialog.js
@@ -113,7 +113,7 @@ ExpressionPreviewDialog.Widget.prototype.getExpression = function(commit) {
     s = this._getLanguage() + ":" + s;
     if (commit) {
         $.post(
-            "/command/log-expression?" + $.param({ project: theProject.id, expression: s }),
+            "/command/core/log-expression?" + $.param({ project: theProject.id, expression: s }),
             null,
             function(data) {
             },
@@ -131,7 +131,7 @@ ExpressionPreviewDialog.Widget.prototype._getLanguage = function() {
 ExpressionPreviewDialog.Widget.prototype._renderHelpTab = function() {
     var self = this;
     $.getJSON(
-        "/command/get-expression-language-info",
+        "/command/core/get-expression-language-info",
         null,
         function(data) {
             self._renderHelp(data);
@@ -212,7 +212,7 @@ ExpressionPreviewDialog.Widget.prototype._renderHelp = function(data) {
 ExpressionPreviewDialog.Widget.prototype._renderExpressionHistoryTab = function() {
     var self = this;
     $.getJSON(
-        "/command/get-expression-history?" + $.param({ project: theProject.id }),
+        "/command/core/get-expression-history?" + $.param({ project: theProject.id }),
         null,
         function(data) {
             self._renderExpressionHistory(data);
@@ -276,7 +276,7 @@ ExpressionPreviewDialog.Widget.prototype.update = function() {
     this._prepareUpdate(params);
     
     $.post(
-        "/command/preview-expression?" + $.param(params), 
+        "/command/core/preview-expression?" + $.param(params), 
         {
             rowIndices: JSON.stringify(this._rowIndices) 
         },
diff --git a/main/webapp/modules/core/scripts/dialogs/extend-data-preview-dialog.js b/main/webapp/modules/core/scripts/dialogs/extend-data-preview-dialog.js
index 71a264ec7..9f1a456c4 100644
--- a/main/webapp/modules/core/scripts/dialogs/extend-data-preview-dialog.js
+++ b/main/webapp/modules/core/scripts/dialogs/extend-data-preview-dialog.js
@@ -135,7 +135,7 @@ ExtendDataPreviewDialog.prototype._update = function() {
     };
     
     $.post(
-        "/command/preview-extend-data?" + $.param(params), 
+        "/command/core/preview-extend-data?" + $.param(params), 
         {
             rowIndices: JSON.stringify(this._rowIndices),
             extension: JSON.stringify(this._extension)
diff --git a/main/webapp/modules/core/scripts/dialogs/freebase-loading-dialog.js b/main/webapp/modules/core/scripts/dialogs/freebase-loading-dialog.js
index 4e5fb9812..199ccb40a 100644
--- a/main/webapp/modules/core/scripts/dialogs/freebase-loading-dialog.js
+++ b/main/webapp/modules/core/scripts/dialogs/freebase-loading-dialog.js
@@ -15,7 +15,7 @@ FreebaseLoadingDialog.prototype._createDialog = function() {
     var loadButton = this._elmts.loadButton;
     
     var check_authorization = function(cont) {
-        $.get("/command/check-authorization/" + provider, function(data) {
+        $.get("/command/core/check-authorization/" + provider, function(data) {
             if ("status" in data && data.code == "/api/status/ok") {
                 authorization.html('Signed in as: <a target="_new" href="http://www.freebase.com/view/user/' + data.username + '">' + data.username + '</a> | <a href="javascript:{}" bind="signout">Sign Out</a>').show();
                 DOM.bind(authorization).signout.click(function() {
@@ -42,7 +42,7 @@ FreebaseLoadingDialog.prototype._createDialog = function() {
     };
     
     var check_allowed = function(user_id, cont) {
-        $.get("/command/user-badges/" + provider, 
+        $.get("/command/core/user-badges/" + provider, 
             { "user_id" : user_id }, 
             function(data) {
                 if ("status" in data && data.code == "/api/status/ok") {
@@ -74,7 +74,7 @@ FreebaseLoadingDialog.prototype._createDialog = function() {
             "guid":   null
         }];
 
-        $.post("/command/mqlwrite/" + provider, 
+        $.post("/command/core/mqlwrite/" + provider, 
             { "query" : JSON.stringify(mql_query) }, 
             function(data) {
                 if ("status" in data && data.code == "/api/status/ok") {
@@ -90,7 +90,7 @@ FreebaseLoadingDialog.prototype._createDialog = function() {
     
     var show_triples = function(cont) {
         $.post(
-            "/command/preview-protograph?" + $.param({ project: theProject.id }),
+            "/command/core/preview-protograph?" + $.param({ project: theProject.id }),
             {
                 protograph: JSON.stringify(theProject.overlayModels.freebaseProtograph || {}),
                 engine: JSON.stringify(ui.browsingEngine.getJSON())
@@ -165,7 +165,7 @@ FreebaseLoadingDialog.prototype._load = function() {
     var doLoad = function() {
         var dismissBusy = DialogSystem.showBusy();
         
-        $.post("/command/upload-data", 
+        $.post("/command/core/upload-data", 
             {
                 project: theProject.id, 
                 "graph" : (freebase) ? "otg" : "sandbox",
diff --git a/main/webapp/modules/core/scripts/dialogs/scatterplot-dialog.js b/main/webapp/modules/core/scripts/dialogs/scatterplot-dialog.js
index 91964dd52..db25589eb 100644
--- a/main/webapp/modules/core/scripts/dialogs/scatterplot-dialog.js
+++ b/main/webapp/modules/core/scripts/dialogs/scatterplot-dialog.js
@@ -52,7 +52,7 @@ ScatterplotDialog.prototype._renderMatrix = function() {
         var params = {
             project: theProject.id
         };
-        $.getJSON("/command/get-columns-info?" + $.param(params),function(data) {
+        $.getJSON("/command/core/get-columns-info?" + $.param(params),function(data) {
             if (data === null || typeof data.length == 'undefined') {
                 container.html("Error calling 'get-columns-info'");
                 return;
@@ -89,7 +89,7 @@ ScatterplotDialog.prototype._renderMatrix = function() {
                     engine: JSON.stringify(ui.browsingEngine.getJSON()), 
                     plotter: JSON.stringify(plotter_params) 
                 };
-                var url = "/command/get-scatterplot?" + $.param(params);
+                var url = "/command/core/get-scatterplot?" + $.param(params);
 
                 var attrs = [
                     'width="' + self._plot_size + '"',
diff --git a/main/webapp/modules/core/scripts/dialogs/templating-exporter-dialog.js b/main/webapp/modules/core/scripts/dialogs/templating-exporter-dialog.js
index 2c3187efc..c8f9cf934 100644
--- a/main/webapp/modules/core/scripts/dialogs/templating-exporter-dialog.js
+++ b/main/webapp/modules/core/scripts/dialogs/templating-exporter-dialog.js
@@ -46,7 +46,7 @@ TemplatingExporterDialog.prototype._dismiss = function() {
 TemplatingExporterDialog.prototype._updatePreview = function() {
     var self = this;
     $.post(
-        "/command/export-rows/preview.txt",
+        "/command/core/export-rows/preview.txt",
         {
             "project" : theProject.id, 
             "format" : "template",
@@ -71,7 +71,7 @@ TemplatingExporterDialog.prototype._export = function() {
     $(form)
         .css("display", "none")
         .attr("method", "post")
-        .attr("action", "/command/export-rows/" + name + ".txt")
+        .attr("action", "/command/core/export-rows/" + name + ".txt")
         .attr("target", "gridworks-export");
         
     var appendField = function(name, value) {
diff --git a/main/webapp/modules/core/scripts/facets/list-facet.js b/main/webapp/modules/core/scripts/facets/list-facet.js
index 2b9eb6966..376e61719 100644
--- a/main/webapp/modules/core/scripts/facets/list-facet.js
+++ b/main/webapp/modules/core/scripts/facets/list-facet.js
@@ -495,7 +495,7 @@ ListFacet.prototype._editChoice = function(choice, choiceDiv) {
             edit.from = [ originalContent ];
         }
         
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "mass-edit",
             {},
             {
diff --git a/main/webapp/modules/core/scripts/facets/scatterplot-facet.js b/main/webapp/modules/core/scripts/facets/scatterplot-facet.js
index 26ee09985..e1c845e2c 100644
--- a/main/webapp/modules/core/scripts/facets/scatterplot-facet.js
+++ b/main/webapp/modules/core/scripts/facets/scatterplot-facet.js
@@ -240,7 +240,7 @@ ScatterplotFacet.prototype._formulateImageUrl = function(engineConfig, conf) {
         engine: JSON.stringify(engineConfig), 
         plotter: JSON.stringify(options) 
     };
-    return "/command/get-scatterplot?" + $.param(params);
+    return "/command/core/get-scatterplot?" + $.param(params);
 };
 
 ScatterplotFacet.prototype.updateState = function(data) {
diff --git a/main/webapp/modules/core/scripts/index.js b/main/webapp/modules/core/scripts/index.js
index aea8efac4..bfadcf13e 100644
--- a/main/webapp/modules/core/scripts/index.js
+++ b/main/webapp/modules/core/scripts/index.js
@@ -9,7 +9,7 @@ function onClickUploadFileButton(evt) {
 
     } else {
         $("#file-upload-form").attr("action",
-            "/command/create-project-from-upload?" + [
+            "/command/core/create-project-from-upload?" + [
                 "url=" +                escape(dataURL),
                 "split-into-columns=" + $("#split-into-columns-input")[0].checked,
                 "separator=" +          $("#separator-input")[0].value,
@@ -72,7 +72,7 @@ function isThereNewRelease() {
 
 function fetchProjects() {
     $.getJSON(
-        "/command/get-all-project-metadata",
+        "/command/core/get-all-project-metadata",
         null,
         function(data) {
             renderProjects(data);
@@ -135,7 +135,7 @@ function renderProjects(data) {
 
                     $.ajax({
                         type: "POST",
-                        url: "/command/rename-project",
+                        url: "/command/core/rename-project",
                         data: { "project" : project.id, "name" : name },
                         dataType: "json",
                         success: function (data) {
@@ -163,7 +163,7 @@ function renderProjects(data) {
                 if (window.confirm("Are you sure you want to delete project \"" + project.name + "\"?")) {
                     $.ajax({
                         type: "POST",
-                        url: "/command/delete-project",
+                        url: "/command/core/delete-project",
                         data: { "project" : project.id },
                         dataType: "json",
                         success: function (data) {
diff --git a/main/webapp/modules/core/scripts/preferences.js b/main/webapp/modules/core/scripts/preferences.js
index 5dbd5c0c9..86e532fca 100644
--- a/main/webapp/modules/core/scripts/preferences.js
+++ b/main/webapp/modules/core/scripts/preferences.js
@@ -2,7 +2,7 @@ var preferenceUIs = [];
 
 function onLoad() {
     $.post(
-        "/command/get-all-preferences",
+        "/command/core/get-all-preferences",
         null,
         populatePreferences,
         "json"
@@ -33,7 +33,7 @@ function populatePreferences(prefs) {
                 preferenceUIs.push(new PreferenceUI(tr, key, value));
                 
                 $.post(
-                    "/command/set-preference",
+                    "/command/core/set-preference",
                     {
                         name : key,
                         value : JSON.stringify(value)
@@ -66,7 +66,7 @@ function PreferenceUI(tr, key, value) {
         if (newValue != null) {
             $(td1).text(newValue);
             $.post(
-                "/command/set-preference",
+                "/command/core/set-preference",
                 {
                     name : key,
                     value : JSON.stringify(newValue)
@@ -84,7 +84,7 @@ function PreferenceUI(tr, key, value) {
     $('<button>').text("Delete").appendTo(td2).click(function() {
         if (window.confirm("Delete preference key " + key + "?")) {
             $.post(
-                "/command/set-preference",
+                "/command/core/set-preference",
                 {
                     name : key
                 },
diff --git a/main/webapp/modules/core/scripts/project.js b/main/webapp/modules/core/scripts/project.js
index e39b35a98..caf61e102 100644
--- a/main/webapp/modules/core/scripts/project.js
+++ b/main/webapp/modules/core/scripts/project.js
@@ -135,11 +135,11 @@ Gridworks.setTitle = function(status) {
 
 Gridworks.reinitializeProjectData = function(f) {
     Ajax.chainGetJSON(
-        "/command/get-project-metadata?" + $.param({ project: theProject.id }), null,
+        "/command/core/get-project-metadata?" + $.param({ project: theProject.id }), null,
         function(data) {
             theProject.metadata = data;
         },
-        "/command/get-models?" + $.param({ project: theProject.id }), null,
+        "/command/core/get-models?" + $.param({ project: theProject.id }), null,
         function(data) {
             for (var n in data) {
                 if (data.hasOwnProperty(n)) {
@@ -209,7 +209,11 @@ Gridworks.update = function(options, onFinallyDone) {
     }, 500);
 };
 
-Gridworks.postProcess = function(command, params, body, updateOptions, callbacks) {
+Gridworks.postCoreProcess = function(command, params, body, updateOptions, callbacks) {
+    Gridworks.postProcess("core", command, params, body, updateOptions, callbacks);
+};
+
+Gridworks.postProcess = function(moduleName, command, params, body, updateOptions, callbacks) {
     updateOptions = updateOptions || {};
     callbacks = callbacks || {};
     
@@ -277,7 +281,7 @@ Gridworks.postProcess = function(command, params, body, updateOptions, callbacks
     Gridworks.setAjaxInProgress();
     
     $.post(
-        "/command/" + command + "?" + $.param(params),
+        "/command/" + moduleName + "/" + command + "?" + $.param(params),
         body,
         onDone,
         "json"
@@ -358,7 +362,7 @@ Gridworks.fetchRows = function(start, limit, onDone, sorting) {
     }
     
     $.post(
-        "/command/get-rows?" + $.param({ project: theProject.id, start: start, limit: limit }) + "&callback=?",
+        "/command/core/get-rows?" + $.param({ project: theProject.id, start: start, limit: limit }) + "&callback=?",
         body,
         function(data) {
             theProject.rowModel = data;
diff --git a/main/webapp/modules/core/scripts/project/browsing-engine.js b/main/webapp/modules/core/scripts/project/browsing-engine.js
index 79ce16a1b..fe72818f6 100644
--- a/main/webapp/modules/core/scripts/project/browsing-engine.js
+++ b/main/webapp/modules/core/scripts/project/browsing-engine.js
@@ -213,7 +213,7 @@ BrowsingEngine.prototype.update = function(onDone) {
     this._elmts.indicator.css("visibility", "visible");
     
     $.post(
-        "/command/compute-facets?" + $.param({ project: theProject.id }),
+        "/command/core/compute-facets?" + $.param({ project: theProject.id }),
         { engine: JSON.stringify(this.getJSON(true)) },
         function(data) {
             var facetData = data.facets;
diff --git a/main/webapp/modules/core/scripts/project/menu-bar.js b/main/webapp/modules/core/scripts/project/menu-bar.js
index 1e8dadfb2..97ee4dee1 100644
--- a/main/webapp/modules/core/scripts/project/menu-bar.js
+++ b/main/webapp/modules/core/scripts/project/menu-bar.js
@@ -241,7 +241,7 @@ MenuBar.handlers.exportRows = function(format, ext) {
     $(form)
         .css("display", "none")
         .attr("method", "post")
-        .attr("action", "/command/export-rows/" + name + "." + ext)
+        .attr("action", "/command/core/export-rows/" + name + "." + ext)
         .attr("target", "gridworks-export");
 
     $('<input />')
@@ -271,7 +271,7 @@ MenuBar.handlers.exportProject = function() {
     $(form)
         .css("display", "none")
         .attr("method", "post")
-        .attr("action", "/command/export-project/" + name + ".gridworks.tar.gz")
+        .attr("action", "/command/core/export-project/" + name + ".gridworks.tar.gz")
         .attr("target", "gridworks-export");
     $('<input />')
         .attr("name", "project")
@@ -299,7 +299,7 @@ MenuBar.handlers.renameProject = function() {
 
     $.ajax({
         type: "POST",
-        url: "/command/rename-project",
+        url: "/command/core/rename-project",
         data: { "project" : theProject.id, "name" : name },
         dataType: "json",
         success: function (data) {
@@ -327,7 +327,7 @@ MenuBar.handlers.loadIntoFreebase = function() {
 };
 
 MenuBar.handlers.importQAData = function() {
-    Gridworks.postProcess(
+    Gridworks.postCoreProcess(
         "import-qa-data",
         {},
         {},
diff --git a/main/webapp/modules/core/scripts/protograph/schema-alignment.js b/main/webapp/modules/core/scripts/protograph/schema-alignment.js
index 847393de3..c5e1080dd 100644
--- a/main/webapp/modules/core/scripts/protograph/schema-alignment.js
+++ b/main/webapp/modules/core/scripts/protograph/schema-alignment.js
@@ -169,7 +169,7 @@ SchemaAlignmentDialog.prototype._constructFooter = function(footer) {
     $('<button></button>').html("&nbsp;&nbsp;OK&nbsp;&nbsp;").click(function() {
         var protograph = self.getJSON();
         
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "save-protograph",
             {},
             { protograph: JSON.stringify(protograph) },
@@ -263,7 +263,7 @@ SchemaAlignmentDialog.prototype.preview = function() {
     
     var protograph = this.getJSON();
     $.post(
-        "/command/preview-protograph?" + $.param({ project: theProject.id }),
+        "/command/core/preview-protograph?" + $.param({ project: theProject.id }),
         { protograph: JSON.stringify(protograph), engine: JSON.stringify(ui.browsingEngine.getJSON()) },
         function(data) {
             if ("mqllike" in data) {
diff --git a/main/webapp/modules/core/scripts/reconciliation/freebase-query-panel.js b/main/webapp/modules/core/scripts/reconciliation/freebase-query-panel.js
index 7325498ab..5edbe40e5 100644
--- a/main/webapp/modules/core/scripts/reconciliation/freebase-query-panel.js
+++ b/main/webapp/modules/core/scripts/reconciliation/freebase-query-panel.js
@@ -91,7 +91,7 @@ ReconFreebaseQueryPanel.prototype.start = function() {
         };
     }
     
-    Gridworks.postProcess(
+    Gridworks.postCoreProcess(
         "reconcile",
         {},
         bodyParams,
diff --git a/main/webapp/modules/core/scripts/reconciliation/recon-manager.js b/main/webapp/modules/core/scripts/reconciliation/recon-manager.js
index de3cc5215..5e3d627c0 100644
--- a/main/webapp/modules/core/scripts/reconciliation/recon-manager.js
+++ b/main/webapp/modules/core/scripts/reconciliation/recon-manager.js
@@ -81,7 +81,7 @@ ReconciliationManager.save = function(f) {
     $.ajax({
         async: false,
         type: "POST",
-        url: "/command/set-preference?" + $.param({ 
+        url: "/command/core/set-preference?" + $.param({ 
             name: "reconciliation.standardServices" 
         }),
         data: { "value" : JSON.stringify(ReconciliationManager.standardServices) },
@@ -100,7 +100,7 @@ ReconciliationManager.save = function(f) {
     
     $.ajax({
         async: false,
-        url: "/command/get-preference?" + $.param({ 
+        url: "/command/core/get-preference?" + $.param({ 
             name: "reconciliation.standardServices" 
         }),
         success: function(data) {
diff --git a/main/webapp/modules/core/scripts/reconciliation/standard-service-panel.js b/main/webapp/modules/core/scripts/reconciliation/standard-service-panel.js
index 74f8e1849..d9884f46b 100644
--- a/main/webapp/modules/core/scripts/reconciliation/standard-service-panel.js
+++ b/main/webapp/modules/core/scripts/reconciliation/standard-service-panel.js
@@ -12,7 +12,7 @@ ReconStandardServicePanel.prototype._guessTypes = function(f) {
     var dismissBusy = DialogSystem.showBusy();
     
     $.post(
-        "/command/guess-types-of-column?" + $.param({
+        "/command/core/guess-types-of-column?" + $.param({
             project: theProject.id, 
             columnName: this._column.name,
             service: this._service.url
@@ -271,7 +271,7 @@ ReconStandardServicePanel.prototype.start = function() {
         }
     );
     
-    Gridworks.postProcess(
+    Gridworks.postCoreProcess(
         "reconcile",
         {},
         {
diff --git a/main/webapp/modules/core/scripts/util/sign.js b/main/webapp/modules/core/scripts/util/sign.js
index 70d4ddbe5..1cd46b6fa 100644
--- a/main/webapp/modules/core/scripts/util/sign.js
+++ b/main/webapp/modules/core/scripts/util/sign.js
@@ -69,7 +69,7 @@
       },
       
       signin : function(success, provider, width, height) {
-        var newwin = window.Sign.popup("/command/authorize/" + provider, width, height);
+        var newwin = window.Sign.popup("/command/core/authorize/" + provider, width, height);
         
         if (newwin !== null) {
             newwin.opener = window;
@@ -80,7 +80,7 @@
             window.location.reload();
           } else {
             $.ajax({
-              url: "/command/check-authorization/" + provider,
+              url: "/command/core/check-authorization/" + provider,
               dataType: "json",
               success: function(data) {
                 window.user = data;
@@ -105,7 +105,7 @@
       
       signout : function(success,provider) {
         $.ajax({
-          url: "/command/deauthorize/" + provider,
+          url: "/command/core/deauthorize/" + provider,
           success: function() {
             if (typeof success == 'undefined') {
               window.location.reload();
diff --git a/main/webapp/modules/core/scripts/views/data-table/cell-ui.js b/main/webapp/modules/core/scripts/views/data-table/cell-ui.js
index feb1df622..0de73e231 100644
--- a/main/webapp/modules/core/scripts/views/data-table/cell-ui.js
+++ b/main/webapp/modules/core/scripts/views/data-table/cell-ui.js
@@ -303,7 +303,7 @@ DataTableCellUI.prototype._searchForMatch = function(suggestOptions) {
 DataTableCellUI.prototype._postProcessOneCell = function(command, params, bodyParams, columnStatsChanged) {
     var self = this;
 
-    Gridworks.postProcess(
+    Gridworks.postCoreProcess(
         command, 
         params, 
         bodyParams,
@@ -324,7 +324,7 @@ DataTableCellUI.prototype._postProcessOneCell = function(command, params, bodyPa
 };
 
 DataTableCellUI.prototype._postProcessSeveralCells = function(command, params, bodyParams, columnStatsChanged) {
-    Gridworks.postProcess(
+    Gridworks.postCoreProcess(
         command, 
         params, 
         bodyParams,
@@ -410,7 +410,7 @@ DataTableCellUI.prototype._startEdit = function(elmt) {
         MenuSystem.dismissAll();
         
         if (applyOthers) {
-            Gridworks.postProcess(
+            Gridworks.postCoreProcess(
                 "mass-edit",
                 {},
                 {
@@ -425,7 +425,7 @@ DataTableCellUI.prototype._startEdit = function(elmt) {
                 { cellsChanged: true }
             );            
         } else {
-            Gridworks.postProcess(
+            Gridworks.postCoreProcess(
                 "edit-one-cell", 
                 {
                     row: self._rowIndex,
diff --git a/main/webapp/modules/core/scripts/views/data-table/data-table-view.js b/main/webapp/modules/core/scripts/views/data-table/data-table-view.js
index 3fa631a34..7c34151c2 100644
--- a/main/webapp/modules/core/scripts/views/data-table/data-table-view.js
+++ b/main/webapp/modules/core/scripts/views/data-table/data-table-view.js
@@ -280,7 +280,7 @@ DataTableView.prototype._renderDataTable = function(table) {
             .click(function() {
                 var newStarred = !row.starred;
                 
-                Gridworks.postProcess(
+                Gridworks.postCoreProcess(
                     "annotate-one-row",
                     { row: row.i, starred: newStarred },
                     null,
@@ -301,7 +301,7 @@ DataTableView.prototype._renderDataTable = function(table) {
             .click(function() {
                 var newFlagged = !row.flagged;
 
-                Gridworks.postProcess(
+                Gridworks.postCoreProcess(
                     "annotate-one-row",
                     { row: row.i, flagged: newFlagged },
                     null,
@@ -471,33 +471,33 @@ DataTableView.prototype._createMenuForAllColumns = function(elmt) {
                 {
                     label: "Star Rows",
                     click: function() {
-                        Gridworks.postProcess("annotate-rows", { "starred" : "true" }, null, { rowMetadataChanged: true });
+                        Gridworks.postCoreProcess("annotate-rows", { "starred" : "true" }, null, { rowMetadataChanged: true });
                     }
                 },
                 {
                     label: "Unstar Rows",
                     click: function() {
-                        Gridworks.postProcess("annotate-rows", { "starred" : "false" }, null, { rowMetadataChanged: true });
+                        Gridworks.postCoreProcess("annotate-rows", { "starred" : "false" }, null, { rowMetadataChanged: true });
                     }
                 },
                 {},
                 {
                     label: "Flag Rows",
                     click: function() {
-                        Gridworks.postProcess("annotate-rows", { "flagged" : "true" }, null, { rowMetadataChanged: true });
+                        Gridworks.postCoreProcess("annotate-rows", { "flagged" : "true" }, null, { rowMetadataChanged: true });
                     }
                 },
                 {
                     label: "Unflag Rows",
                     click: function() {
-                        Gridworks.postProcess("annotate-rows", { "flagged" : "false" }, null, { rowMetadataChanged: true });
+                        Gridworks.postCoreProcess("annotate-rows", { "flagged" : "false" }, null, { rowMetadataChanged: true });
                     }
                 },
                 {},
                 {
                     label: "Remove All Matching Rows",
                     click: function() {
-                        Gridworks.postProcess("remove-rows", {}, null, { rowMetadataChanged: true });
+                        Gridworks.postCoreProcess("remove-rows", {}, null, { rowMetadataChanged: true });
                     }
                 }
             ]
@@ -538,7 +538,7 @@ DataTableView.prototype._createSortingMenu = function(elmt) {
         {
             "label" : "Reorder Rows Permanently",
             "click" : function() {
-                Gridworks.postProcess(
+                Gridworks.postCoreProcess(
                     "reorder-rows",
                     null,
                     { "sorting" : JSON.stringify(self._sorting) }, 
diff --git a/main/webapp/modules/core/scripts/views/data-table/menu-edit-cells.js b/main/webapp/modules/core/scripts/views/data-table/menu-edit-cells.js
index 7fc1b66c8..fc8d92d7c 100644
--- a/main/webapp/modules/core/scripts/views/data-table/menu-edit-cells.js
+++ b/main/webapp/modules/core/scripts/views/data-table/menu-edit-cells.js
@@ -1,6 +1,6 @@
 DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     var doTextTransform = function(expression, onError, repeat, repeatCount) {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "text-transform",
             {
                 columnName: column.name, 
@@ -54,7 +54,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     };
     
     var doFillDown = function() {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "fill-down", 
             {
                 columnName: column.name
@@ -65,7 +65,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     };
 
     var doBlankDown = function() {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "blank-down", 
             {
                 columnName: column.name
@@ -78,7 +78,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
    var doJoinMultiValueCells = function() {
         var separator = window.prompt("Enter separator to use between values", ", ");
         if (separator !== null) {
-            Gridworks.postProcess(
+            Gridworks.postCoreProcess(
                 "join-multi-value-cells", 
                 {
                     columnName: column.name,
@@ -94,7 +94,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     var doSplitMultiValueCells = function() {
         var separator = window.prompt("What separator currently separates the values?", ",");
         if (separator !== null) {
-            Gridworks.postProcess(
+            Gridworks.postCoreProcess(
                 "split-multi-value-cells", 
                 {
                     columnName: column.name,
@@ -194,7 +194,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
                 ignoreBlankCells: elmts.ignoreBlankCellsCheckbox[0].checked
             };
 
-            Gridworks.postProcess(
+            Gridworks.postCoreProcess(
                 "transpose-columns-into-rows", 
                 config,
                 null,
@@ -254,7 +254,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
                     rowCount: rowCount
                 };
 
-                Gridworks.postProcess(
+                Gridworks.postCoreProcess(
                     "transpose-rows-into-columns", 
                     config,
                     null,
diff --git a/main/webapp/modules/core/scripts/views/data-table/menu-edit-column.js b/main/webapp/modules/core/scripts/views/data-table/menu-edit-column.js
index ec6d51f55..2d9a37131 100644
--- a/main/webapp/modules/core/scripts/views/data-table/menu-edit-column.js
+++ b/main/webapp/modules/core/scripts/views/data-table/menu-edit-column.js
@@ -19,7 +19,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
                 return;
             }
 
-            Gridworks.postProcess(
+            Gridworks.postCoreProcess(
                 "add-column", 
                 {
                     baseColumnName: column.name, 
@@ -51,7 +51,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
             columnIndex, 
             o.rowIndices, 
             function(extension) {
-                Gridworks.postProcess(
+                Gridworks.postCoreProcess(
                     "extend-data", 
                     {
                         baseColumnName: column.name,
@@ -67,7 +67,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     };
 
     var doRemoveColumn = function() {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "remove-column", 
             {
                 columnName: column.name
@@ -80,7 +80,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     var doRenameColumn = function() {
         var newColumnName = window.prompt("Enter new column name", column.name);
         if (newColumnName !== null) {
-            Gridworks.postProcess(
+            Gridworks.postCoreProcess(
                 "rename-column", 
                 {
                     oldColumnName: column.name,
@@ -93,7 +93,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     };
 
     var doMoveColumnTo = function(index) {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "move-column", 
             {
                 columnName: column.name,
@@ -105,7 +105,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     };
 
     var doMoveColumnBy = function(change) {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "move-column", 
             {
                 columnName: column.name,
@@ -169,7 +169,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
                 config.fieldLengths = JSON.stringify(lengths);
             }
 
-            Gridworks.postProcess(
+            Gridworks.postCoreProcess(
                 "split-column", 
                 config,
                 null,
diff --git a/main/webapp/modules/core/scripts/views/data-table/menu-reconcile.js b/main/webapp/modules/core/scripts/views/data-table/menu-reconcile.js
index 5caebd22e..715efe254 100644
--- a/main/webapp/modules/core/scripts/views/data-table/menu-reconcile.js
+++ b/main/webapp/modules/core/scripts/views/data-table/menu-reconcile.js
@@ -4,7 +4,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     };
 
     var doReconDiscardJudgments = function() {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "recon-discard-judgments",
             { columnName: column.name },
             null,
@@ -13,7 +13,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     };
 
     var doReconMatchBestCandidates = function() {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "recon-match-best-candidates",
             { columnName: column.name },
             null,
@@ -22,7 +22,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
     };
 
     var doReconMarkNewTopics = function(shareNewTopics) {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "recon-mark-new-topics",
             { columnName: column.name, shareNewTopics: shareNewTopics },
             null,
@@ -56,7 +56,7 @@ DataTableColumnHeaderUI.extendMenu(function(column, columnHeaderUI, menu) {
                 function(o) {
                     var types = "result" in o ? o.result.type : [];
 
-                    Gridworks.postProcess(
+                    Gridworks.postCoreProcess(
                         "recon-match-specific-topic-to-cells",
                         {
                             columnName: column.name,
diff --git a/main/webapp/modules/core/scripts/widgets/history-widget.js b/main/webapp/modules/core/scripts/widgets/history-widget.js
index cd95ace75..389a9f979 100644
--- a/main/webapp/modules/core/scripts/widgets/history-widget.js
+++ b/main/webapp/modules/core/scripts/widgets/history-widget.js
@@ -15,7 +15,7 @@ HistoryWidget.prototype.resize = function() {
 HistoryWidget.prototype.update = function(onDone) {
     var self = this;
     Ajax.chainGetJSON(
-        "/command/get-history?" + $.param({ project: theProject.id }), null,
+        "/command/core/get-history?" + $.param({ project: theProject.id }), null,
         function(data) {
             self._data = data;
             self._render();
@@ -100,7 +100,7 @@ HistoryWidget.prototype._render = function() {
 HistoryWidget.prototype._onClickHistoryEntry = function(evt, entry, lastDoneID) {
     var self = this;
     
-    Gridworks.postProcess(
+    Gridworks.postCoreProcess(
         "undo-redo",
         { lastDoneID: lastDoneID },
         null,
@@ -111,7 +111,7 @@ HistoryWidget.prototype._onClickHistoryEntry = function(evt, entry, lastDoneID)
 HistoryWidget.prototype._extractOperations = function() {
     var self = this;
     $.getJSON(
-        "/command/get-operations?" + $.param({ project: theProject.id }), 
+        "/command/core/get-operations?" + $.param({ project: theProject.id }), 
         null,
         function(data) {
             if ("entries" in data) {
@@ -218,7 +218,7 @@ HistoryWidget.prototype._showApplyOperationsDialog = function() {
             return;
         }
         
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "apply-operations",
             {},
             { operations: JSON.stringify(json) },
diff --git a/main/webapp/modules/core/scripts/widgets/process-widget.js b/main/webapp/modules/core/scripts/widgets/process-widget.js
index bab094ad2..d972184f5 100644
--- a/main/webapp/modules/core/scripts/widgets/process-widget.js
+++ b/main/webapp/modules/core/scripts/widgets/process-widget.js
@@ -45,7 +45,7 @@ ProcessWidget.prototype.update = function(updateOptions, onDone) {
     
     var self = this;
     Ajax.chainGetJSON(
-        "/command/get-processes?" + $.param({ project: theProject.id }), null,
+        "/command/core/get-processes?" + $.param({ project: theProject.id }), null,
         function(data) {
             self._latestHistoryEntry = null;
             self._render(data);
@@ -72,7 +72,7 @@ ProcessWidget.prototype.showUndo = function(historyEntry) {
 
 ProcessWidget.prototype.undo = function() {
     if (this._latestHistoryEntry !== null) {
-        Gridworks.postProcess(
+        Gridworks.postCoreProcess(
             "undo-redo",
             { undoID: this._latestHistoryEntry.id },
             null,
@@ -84,7 +84,7 @@ ProcessWidget.prototype.undo = function() {
 ProcessWidget.prototype._cancelAll = function() {
     var self = this;
     $.post(
-        "/command/cancel-processes?" + $.param({ project: theProject.id }), 
+        "/command/core/cancel-processes?" + $.param({ project: theProject.id }), 
         null,
         function(o) {
             self._data = null;