diff --git a/src/com/annimon/ownlang/utils/ModulesInfoCreator.java b/src/com/annimon/ownlang/utils/ModulesInfoCreator.java
index 6523d0c..6e6a91b 100644
--- a/src/com/annimon/ownlang/utils/ModulesInfoCreator.java
+++ b/src/com/annimon/ownlang/utils/ModulesInfoCreator.java
@@ -2,15 +2,21 @@ package com.annimon.ownlang.utils;
 
 import com.annimon.ownlang.annotations.Modules;
 import com.annimon.ownlang.lib.Functions;
+import com.annimon.ownlang.lib.MapValue;
 import com.annimon.ownlang.lib.Types;
 import com.annimon.ownlang.lib.Value;
 import com.annimon.ownlang.lib.Variables;
 import com.annimon.ownlang.lib.modules.Module;
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 import org.json.JSONArray;
 import org.json.JSONObject;
 
@@ -32,6 +38,7 @@ public final class ModulesInfoCreator {
             final ModuleInfo moduleInfo = new ModuleInfo(moduleClass.getSimpleName());
             moduleInfo.functions.addAll(Functions.getFunctions().keySet());
             moduleInfo.constants.putAll(Variables.variables());
+            moduleInfo.types.addAll(listValues(moduleClass));
             moduleInfos.add(moduleInfo);
         }
 
@@ -52,15 +59,30 @@ public final class ModulesInfoCreator {
         );
     }
 
+    private static List<String> listValues(Class moduleClass) {
+        return Arrays.stream(moduleClass.getDeclaredClasses())
+                .filter(clazz -> getAllInterfaces(clazz).stream().anyMatch(i -> i.equals(Value.class)))
+                .map(Class::getSimpleName)
+                .collect(Collectors.toList());
+    }
+
+    private static Set<Class> getAllInterfaces(Class clazz) {
+        if (clazz.getSuperclass() == null) return Collections.emptySet();
+        return Stream.concat(Arrays.stream(clazz.getInterfaces()), getAllInterfaces(clazz.getSuperclass()).stream())
+                .collect(Collectors.toSet());
+    }
+
     static class ModuleInfo {
         private final String name;
         List<String> functions;
         Map<String, Value> constants;
+        List<String> types;
 
         public ModuleInfo(String name) {
             this.name = name;
             functions = new ArrayList<>();
             constants = new HashMap<>();
+            types = new ArrayList<>();
         }
 
         public JSONArray constantsJSON() {
@@ -74,7 +96,16 @@ public final class ModulesInfoCreator {
                 constant.put("name", entry.getKey());
                 constant.put("type", value.type());
                 constant.put("typeName", Types.typeToString(value.type()));
-                constant.put("value", value.asString());
+                if (value.type() == Types.MAP) {
+                    String text = ((Map<Value, Value>) value.raw()).entrySet().stream()
+                            .sorted(Comparator.comparing(
+                                    e -> ((MapValue)value).size() > 16 ? e.getKey() : e.getValue()))
+                            .map(s -> s.toString())
+                            .collect(Collectors.joining(", ", "{", "}"));
+                    constant.put("value", text);
+                } else {
+                    constant.put("value", value.asString());
+                }
                 result.put(constant);
             });
             return result;
@@ -85,6 +116,15 @@ public final class ModulesInfoCreator {
             json.put("name", name);
             json.put("functions", functions.stream().sorted().toArray());
             json.put("constants", constantsJSON());
+            if (!types.isEmpty()) {
+                json.put("types", types.stream().sorted()
+                        .map(s -> {
+                            final JSONObject type = new JSONObject();
+                            type.put("name", s);
+                            return type;
+                        })
+                        .toArray());
+            }
             return json;
         }
     }