diff --git a/src/main/java/com/metaweb/gridworks/GridworksServlet.java b/src/main/java/com/metaweb/gridworks/GridworksServlet.java
index 4c9ea3c17..47eb4a186 100644
--- a/src/main/java/com/metaweb/gridworks/GridworksServlet.java
+++ b/src/main/java/com/metaweb/gridworks/GridworksServlet.java
@@ -119,8 +119,7 @@ public class GridworksServlet extends HttpServlet {
     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         ProjectManager.initialize();
         
-        String commandName = request.getPathInfo().substring(1);
-        Command command = _commands.get(commandName);
+        Command command = _commands.get(getCommandName(request));
         if (command != null) {
             command.doPost(request, response);
         }
@@ -129,11 +128,15 @@ public class GridworksServlet extends HttpServlet {
     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         ProjectManager.initialize();
         
-        String commandName = request.getPathInfo().substring(1);
-        Command command = _commands.get(commandName);
+        Command command = _commands.get(getCommandName(request));
         if (command != null) {
             command.doGet(request, response);
         }
     }
     
+    protected String getCommandName(HttpServletRequest request) {
+        String commandName = request.getPathInfo().substring(1);
+        int slash = commandName.indexOf('/');
+        return slash > 0 ? commandName.substring(0, slash) : commandName;
+    }
 }
diff --git a/src/main/java/com/metaweb/gridworks/commands/info/ExportRowsCommand.java b/src/main/java/com/metaweb/gridworks/commands/info/ExportRowsCommand.java
index f5bdb1e10..32e9f738e 100644
--- a/src/main/java/com/metaweb/gridworks/commands/info/ExportRowsCommand.java
+++ b/src/main/java/com/metaweb/gridworks/commands/info/ExportRowsCommand.java
@@ -1,20 +1,19 @@
 package com.metaweb.gridworks.commands.info;
 
-import java.io.IOException;
+ import java.io.IOException;
 import java.io.PrintWriter;
+import java.util.Properties;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import com.metaweb.gridworks.browsing.Engine;
-import com.metaweb.gridworks.browsing.FilteredRows;
-import com.metaweb.gridworks.browsing.RowVisitor;
 import com.metaweb.gridworks.commands.Command;
-import com.metaweb.gridworks.model.Cell;
-import com.metaweb.gridworks.model.Column;
+import com.metaweb.gridworks.exporters.Exporter;
+import com.metaweb.gridworks.exporters.TripleloaderExporter;
+import com.metaweb.gridworks.exporters.TsvExporter;
 import com.metaweb.gridworks.model.Project;
-import com.metaweb.gridworks.model.Row;
 
 public class ExportRowsCommand extends Command {
 
@@ -24,86 +23,24 @@ public class ExportRowsCommand extends Command {
         try {
             Project project = getProject(request);
             Engine engine = getEngine(request, project);
-            
-            response.setCharacterEncoding("UTF-8");
-            response.setHeader("Content-Type", "text/plain");
+            String format = request.getParameter("format");
             
             PrintWriter writer = response.getWriter();
             
-            boolean first = true;
-            for (Column column : project.columnModel.columns) {
-                if (first) {
-                    first = false;
-                } else {
-                    writer.print("\t");
-                }
-                writer.print(column.getHeaderLabel());
+            Exporter exporter = null;
+            if ("tripleloader".equalsIgnoreCase(format)) {
+                exporter = new TripleloaderExporter();
+            } else {
+                exporter = new TsvExporter();
             }
-            writer.print("\n");
             
-            {
-                RowVisitor visitor = new RowVisitor() {
-                    PrintWriter    writer;
-                    
-                    public RowVisitor init(PrintWriter writer) {
-                        this.writer = writer;
-                        return this;
-                    }
-                    
-                    public boolean visit(Project project, int rowIndex, Row row, boolean contextual) {
-                        boolean first = true;
-                        for (Column column : project.columnModel.columns) {
-                            if (first) {
-                                first = false;
-                            } else {
-                                writer.print("\t");
-                            }
-                            
-                            int cellIndex = column.getCellIndex();
-                            if (cellIndex < row.cells.size()) {
-                                Cell cell = row.cells.get(cellIndex);
-                                if (cell != null && cell.value != null) {
-                                    writer.print(cell.value);
-                                }
-                            }
-                        }
-                        writer.print("\n");
-                        
-                        return false;
-                    }
-                }.init(writer);
-                
-                FilteredRows filteredRows = engine.getAllFilteredRows(true);
-                filteredRows.accept(project, visitor);
-            }
+            response.setCharacterEncoding("UTF-8");
+            response.setHeader("Content-Type", exporter.getContentType());
+            
+            exporter.export(project, new Properties(), engine, writer);
+
         } catch (Exception e) {
             respondException(response, e);
         }
     }
-    
-    static protected class RowAccumulator implements RowVisitor {
-        final public int start;
-        final public int limit;
-        
-        public int total;
-        
-        public RowAccumulator(int start, int limit) {
-            this.start = start;
-            this.limit = limit;
-        }
-        
-        public boolean visit(Project project, int rowIndex, Row row, boolean contextual) {
-            boolean r = false;
-            
-            if (total >= start && total < start + limit) {
-                r = internalVisit(rowIndex, row);
-            }
-            total++;
-            return r;
-        }
-        
-        protected boolean internalVisit(int rowIndex, Row row) {
-            return false;
-        }
-    }
 }
diff --git a/src/main/java/com/metaweb/gridworks/commands/util/PreviewProtographCommand.java b/src/main/java/com/metaweb/gridworks/commands/util/PreviewProtographCommand.java
index 7669132ae..f5ec62cfa 100644
--- a/src/main/java/com/metaweb/gridworks/commands/util/PreviewProtographCommand.java
+++ b/src/main/java/com/metaweb/gridworks/commands/util/PreviewProtographCommand.java
@@ -1,6 +1,7 @@
 package com.metaweb.gridworks.commands.util;
 
 import java.io.IOException;
+import java.io.StringWriter;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
@@ -35,12 +36,14 @@ public class PreviewProtographCommand extends Command {
             sb.append("{ ");
             
             {
-                TripleLoaderTransposedNodeFactory nodeFactory = new TripleLoaderTransposedNodeFactory();
+                StringWriter stringWriter = new StringWriter();
+                TripleLoaderTransposedNodeFactory nodeFactory = new TripleLoaderTransposedNodeFactory(stringWriter);
                 
                 Transposer.transpose(project, protograph, protograph.getRootNode(0), nodeFactory);
+                nodeFactory.flush();
                 
                 sb.append("\"tripleloader\" : ");
-                sb.append(JSONObject.quote(nodeFactory.getLoad()));
+                sb.append(JSONObject.quote(stringWriter.toString()));
             }
             
             {
diff --git a/src/main/java/com/metaweb/gridworks/exporters/Exporter.java b/src/main/java/com/metaweb/gridworks/exporters/Exporter.java
new file mode 100644
index 000000000..2274d55d4
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/exporters/Exporter.java
@@ -0,0 +1,14 @@
+package com.metaweb.gridworks.exporters;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.util.Properties;
+
+import com.metaweb.gridworks.browsing.Engine;
+import com.metaweb.gridworks.model.Project;
+
+public interface Exporter {
+    public String getContentType();
+    
+    public void export(Project project, Properties options, Engine engine, Writer writer) throws IOException;
+}
diff --git a/src/main/java/com/metaweb/gridworks/exporters/TripleloaderExporter.java b/src/main/java/com/metaweb/gridworks/exporters/TripleloaderExporter.java
new file mode 100644
index 000000000..6caa586ee
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/exporters/TripleloaderExporter.java
@@ -0,0 +1,31 @@
+package com.metaweb.gridworks.exporters;
+
+import java.io.IOException; 
+import java.io.Writer;
+import java.util.Properties;
+
+import com.metaweb.gridworks.browsing.Engine;
+import com.metaweb.gridworks.model.Project;
+import com.metaweb.gridworks.protograph.Protograph;
+import com.metaweb.gridworks.protograph.transpose.Transposer;
+import com.metaweb.gridworks.protograph.transpose.TripleLoaderTransposedNodeFactory;
+
+public class TripleloaderExporter implements Exporter {
+    public String getContentType() {
+        return "application/x-unknown";
+    }
+    
+    public void export(Project project, Properties options, Engine engine,
+            Writer writer) throws IOException {
+        
+        if (project.protograph != null) {
+            Protograph protograph = project.protograph;
+            
+            TripleLoaderTransposedNodeFactory nodeFactory = new TripleLoaderTransposedNodeFactory(writer);
+            
+            Transposer.transpose(project, protograph, protograph.getRootNode(0), nodeFactory);
+            nodeFactory.flush();
+        }
+    }
+
+}
diff --git a/src/main/java/com/metaweb/gridworks/exporters/TsvExporter.java b/src/main/java/com/metaweb/gridworks/exporters/TsvExporter.java
new file mode 100644
index 000000000..7abde768f
--- /dev/null
+++ b/src/main/java/com/metaweb/gridworks/exporters/TsvExporter.java
@@ -0,0 +1,73 @@
+package com.metaweb.gridworks.exporters;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.util.Properties;
+
+import com.metaweb.gridworks.browsing.Engine;
+import com.metaweb.gridworks.browsing.FilteredRows;
+import com.metaweb.gridworks.browsing.RowVisitor;
+import com.metaweb.gridworks.model.Cell;
+import com.metaweb.gridworks.model.Column;
+import com.metaweb.gridworks.model.Project;
+import com.metaweb.gridworks.model.Row;
+
+public class TsvExporter implements Exporter {
+    public String getContentType() {
+        return "text/plain";
+    }
+    
+    public void export(Project project, Properties options, Engine engine, Writer writer) throws IOException {
+        boolean first = true;
+        for (Column column : project.columnModel.columns) {
+            if (first) {
+                first = false;
+            } else {
+                writer.write("\t");
+            }
+            writer.write(column.getHeaderLabel());
+        }
+        writer.write("\n");
+        
+        {
+            RowVisitor visitor = new RowVisitor() {
+                Writer writer;
+                
+                public RowVisitor init(Writer writer) {
+                    this.writer = writer;
+                    return this;
+                }
+                
+                public boolean visit(Project project, int rowIndex, Row row, boolean contextual) {
+                    boolean first = true;
+                    try {
+                        for (Column column : project.columnModel.columns) {
+                            if (first) {
+                                first = false;
+                            } else {
+                                writer.write("\t");
+                            }
+                            
+                            int cellIndex = column.getCellIndex();
+                            if (cellIndex < row.cells.size()) {
+                                Cell cell = row.cells.get(cellIndex);
+                                if (cell != null && cell.value != null) {
+                                    Object v = cell.value;
+                                    writer.write(v instanceof String ? ((String) v) : v.toString());
+                                }
+                            }
+                        }
+                        writer.write("\n");
+                    } catch (IOException e) {
+                        // ignore
+                    }
+                    return false;
+                }
+            }.init(writer);
+            
+            FilteredRows filteredRows = engine.getAllFilteredRows(true);
+            filteredRows.accept(project, visitor);
+        }
+    }
+
+}
diff --git a/src/main/java/com/metaweb/gridworks/protograph/transpose/TripleLoaderTransposedNodeFactory.java b/src/main/java/com/metaweb/gridworks/protograph/transpose/TripleLoaderTransposedNodeFactory.java
index 6460284eb..a5c3c5504 100644
--- a/src/main/java/com/metaweb/gridworks/protograph/transpose/TripleLoaderTransposedNodeFactory.java
+++ b/src/main/java/com/metaweb/gridworks/protograph/transpose/TripleLoaderTransposedNodeFactory.java
@@ -1,5 +1,7 @@
 package com.metaweb.gridworks.protograph.transpose;
 
+import java.io.IOException;
+import java.io.Writer;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
@@ -20,28 +22,52 @@ import com.metaweb.gridworks.protograph.FreebaseTopicNode;
 import com.metaweb.gridworks.protograph.ValueNode;
 
 public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory {
-    protected List<WritingTransposedNode> rootNodes = new LinkedList<WritingTransposedNode>();
-    protected StringBuffer stringBuffer;
+    protected boolean start = true;
+    protected Writer writer;
+    protected WritingTransposedNode lastRootNode;
     protected Map<String, Long> varPool = new HashMap<String, Long>();
     protected Map<Long, String> newTopicVars = new HashMap<Long, String>();
     
-    public String getLoad() {
-        stringBuffer = new StringBuffer();
-        for (WritingTransposedNode node : rootNodes) {
-            node.write(null, null);
+    public TripleLoaderTransposedNodeFactory(Writer writer) {
+        this.writer = writer;
+    }
+    
+    public void flush() {
+        if (lastRootNode != null) {
+            lastRootNode.write(null, null);
+            lastRootNode = null;
         }
-        return stringBuffer.toString();
     }
     
     protected void writeLine(String line) {
-        if (stringBuffer.length() > 0) {
-            stringBuffer.append('\n');
+        try {
+            if (start) {
+                start = false;
+            } else {
+                writer.write('\n');
+            }
+            writer.write(line);
+        } catch (IOException e) {
+            // ignore
         }
-        stringBuffer.append(line);
     }
-    protected void writeLine(String subject, String predicate, String object) {
+    protected void writeLine(String subject, String predicate, Object object) {
         if (subject != null && object != null) {
-            writeLine("{ 's' : '" + subject + "', 'p' : '" + predicate + "', 'o' : " + object + " }");
+            String s = object instanceof String ? 
+                    JSONObject.quote((String) object) : object.toString();
+                    
+            writeLine("{ \"s\" : \"" + subject + "\", \"p\" : \"" + predicate + "\", \"o\" : " + s + " }");
+        }
+    }
+    protected void writeLine(String subject, String predicate, Object object, String lang) {
+        if (subject != null && object != null) {
+            String s = object instanceof String ? 
+                    JSONObject.quote((String) object) : object.toString();
+                    
+            writeLine("{ \"s\" : \"" + 
+                    subject + "\", \"p\" : \"" + 
+                    predicate + "\", \"o\" : " + 
+                    s + ", \"lang\" : \"" + lang + "\" }");
         }
     }
     
@@ -90,12 +116,12 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
                         sb.append(", ");
                     }
                     sb.append("\"" + properties.get(i).id + "\": ");
-                    sb.append(s);
+                    sb.append(s instanceof String ? JSONObject.quote(s) : s.toString());
                 }
             }
             sb.append(" }");
             
-            writeLine(subject, predicate, sb.toString());
+            writeLine(subject, predicate, sb);
             
             return null;
         }
@@ -130,8 +156,8 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
                     
                     id = "$" + node.columnName.replaceAll("\\W+", "_") + "_" + var;
                     
-                    writeLine("{ 's' : '" + id + "', 'p' : 'type', 'o' : '" + node.type.id + "' }");
-                    writeLine("{ 's' : '" + id + "', 'p' : 'name', 'o' : " + JSONObject.quote(cell.value.toString()) + " }");
+                    writeLine(id, "type", node.type.id);
+                    writeLine(id, "name", cell.value);
                     
                     if (cell.recon != null) {
                         newTopicVars.put(cell.recon.id, id);
@@ -147,7 +173,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
             
             writeChildren(id);
             
-            return JSONObject.quote(id);
+            return id;
         }
     }
     
@@ -162,28 +188,15 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         }
         
         public String write(String subject, String predicate) {
-            String object = cell.value instanceof String ? 
-                    JSONObject.quote((String) cell.value) : cell.value.toString();
-                    
             if (subject != null) {
                 if ("/type/text".equals(node.lang)) {
-                    writeLine(
-                        "{ 's' : '" + subject + 
-                        "', 'p' : '" + predicate + 
-                        "', 'o' : " + object + 
-                        ", 'lang' : '" + node.lang + 
-                        "' }"
-                    );
+                    writeLine(subject, predicate, cell.value, node.lang);
                 } else {
-                    writeLine(
-                        "{ 's' : '" + subject + 
-                        "', 'p' : '" + predicate + 
-                        "', 'o' : " + object + " }"
-                    );
+                    writeLine(subject, predicate, cell.value);
                 }
             }
             
-            return object;
+            return cell.value.toString();
         }
     }
     
@@ -197,7 +210,7 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         }
         
         public String write(String subject, String predicate) {
-            writeLine(subject, "key", JSONObject.quote(node.namespace.id + "/" + cell.value));
+            writeLine(subject, "key", node.namespace.id + "/" + cell.value);
             
             return null;
         }
@@ -211,12 +224,10 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         }
 
         public String write(String subject, String predicate) {
-            String object = JSONObject.quote(node.topic.id);
+            writeLine(subject, predicate, node.topic.id);
+            writeChildren(node.topic.id);
             
-            writeLine(subject, predicate, object);
-            writeChildren(object);
-            
-            return object;
+            return node.topic.id;
         }
     }
 
@@ -228,26 +239,13 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
         }
 
         public String write(String subject, String predicate) {
-            String object = node.value instanceof String ? 
-                    JSONObject.quote((String) node.value) : node.value.toString();
-                    
             if ("/type/text".equals(node.lang)) {
-                writeLine(
-                    "{ 's' : '" + subject + 
-                    "', 'p' : '" + predicate + 
-                    "', 'o' : " + object + 
-                    ", 'lang' : '" + node.lang + 
-                    "' }"
-                );
+                writeLine(subject, predicate, node.value, node.lang);
             } else {
-                writeLine(
-                    "{ 's' : '" + subject + 
-                    "', 'p' : '" + predicate + 
-                    "', 'o' : " + object + " }"
-                );
+                writeLine(subject, predicate, node.value);
             }
             
-            return object;
+            return node.value.toString();
         }
     }
     
@@ -309,9 +307,9 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
     }
     
     protected void processTransposedNode(
-        WritingTransposedNode     tnode, 
-        TransposedNode             parentNode,
-        FreebaseProperty         property 
+        WritingTransposedNode  tnode, 
+        TransposedNode         parentNode,
+        FreebaseProperty       property 
     ) {
         if (parentNode != null) {
             if (parentNode instanceof TransposedNodeWithChildren) {
@@ -320,7 +318,14 @@ public class TripleLoaderTransposedNodeFactory implements TransposedNodeFactory
                 parentNode2.properties.add(property);
             }
         } else {
-            rootNodes.add(tnode);
+            addRootNode(tnode);
         }
     }
+    
+    protected void addRootNode(WritingTransposedNode tnode) {
+        if (lastRootNode != null) {
+            lastRootNode.write(null, null);
+        }
+        lastRootNode = tnode;
+    }
 }
diff --git a/src/main/webapp/scripts/project/menu-bar.js b/src/main/webapp/scripts/project/menu-bar.js
index d167f76c6..d1a62d536 100644
--- a/src/main/webapp/scripts/project/menu-bar.js
+++ b/src/main/webapp/scripts/project/menu-bar.js
@@ -14,8 +14,17 @@ MenuBar.prototype._initializeUI = function() {
     
     this._createTopLevelMenuItem("Data Set", [
         {
-            label: "Export Filtered Rows",
-            click: function() { self._doExportRows(); }
+            "label": "Export Filtered Rows",
+            "submenu": [
+                {
+                    "label": "Tab-Separated Value",
+                    "click": function() { self._doExportRows("tsv", "tsv"); }
+                },
+                {
+                    "label": "Tripleloader",
+                    "click": function() { self._doExportRows("tripleloader", "txt"); }
+                }
+            ]
         }
     ]);
     this._createTopLevelMenuItem("Schemas", [
@@ -123,18 +132,26 @@ MenuBar.prototype._deactivateMenu = function() {
     this._mode = "inactive";
 };
 
-MenuBar.prototype._doExportRows = function() {
+MenuBar.prototype._doExportRows = function(format, ext) {
     var form = document.createElement("form");
     $(form)
         .css("display", "none")
         .attr("method", "post")
-        .attr("action", "/command/export-rows?project=" + theProject.id)
+        .attr("action", "/command/export-rows/gridworks_" + theProject.id + "." + ext)
         .attr("target", "gridworks-export");
 
     $('<input />')
         .attr("name", "engine")
         .attr("value", JSON.stringify(ui.browsingEngine.getJSON()))
         .appendTo(form);
+    $('<input />')
+        .attr("name", "project")
+        .attr("value", theProject.id)
+        .appendTo(form);
+    $('<input />')
+        .attr("name", "format")
+        .attr("value", format)
+        .appendTo(form);
     
     document.body.appendChild(form);
 
diff --git a/src/main/webapp/scripts/protograph/schema-alignment.js b/src/main/webapp/scripts/protograph/schema-alignment.js
index da2886d66..4e25a010e 100644
--- a/src/main/webapp/scripts/protograph/schema-alignment.js
+++ b/src/main/webapp/scripts/protograph/schema-alignment.js
@@ -166,6 +166,7 @@ SchemaAlignmentDialog.prototype._constructFooter = function(footer) {
             "save-protograph",
             {},
             { protograph: JSON.stringify(protograph) },
+            {},
             {   
                 onDone: function() {
                     DialogSystem.dismissUntil(self._level - 1);