diff --git a/src/data/card.cpp b/src/data/card.cpp
index f1b51aec..1fa92a02 100644
--- a/src/data/card.cpp
+++ b/src/data/card.cpp
@@ -78,7 +78,7 @@ IMPLEMENT_REFLECTION(Card) {
     } else if (stylesheet_for_reading()) {
       REFLECT_IF_READING styling_data.init(stylesheet_for_reading()->styling_fields);
       REFLECT(styling_data);
-    } else if (tag.reading()) {
+    } else if (Handler::isReading) {
       has_styling = false; // We don't know the style, this can be because of copy/pasting
     }
   }
diff --git a/src/data/field.cpp b/src/data/field.cpp
index 330abb4f..587c10b7 100644
--- a/src/data/field.cpp
+++ b/src/data/field.cpp
@@ -47,7 +47,6 @@ IMPLEMENT_REFLECTION(Field) {
     REFLECT(type);
   }
   REFLECT(name);
-  REFLECT_IF_READING name = canonical_name_form(name);
   REFLECT(caption);
   REFLECT(description);
   REFLECT_N("icon", icon_filename);
@@ -63,8 +62,12 @@ IMPLEMENT_REFLECTION(Field) {
   REFLECT(card_list_name);
   REFLECT(sort_script);
   REFLECT_N("card_list_alignment", card_list_align);
-  REFLECT_IF_READING if(caption.empty()) caption = name_to_caption(name);
-  REFLECT_IF_READING if(card_list_name.empty()) card_list_name = capitalize(caption);
+}
+
+void Field::after_reading(Version ver) {
+  name = canonical_name_form(name);
+  if(caption.empty()) caption = name_to_caption(name);
+  if(card_list_name.empty()) card_list_name = capitalize(caption);
 }
 
 template <>
diff --git a/src/data/field.hpp b/src/data/field.hpp
index e104fef5..d6695876 100644
--- a/src/data/field.hpp
+++ b/src/data/field.hpp
@@ -74,6 +74,8 @@ class Field : public IntrusivePtrVirtualBase {
   
   private:
   DECLARE_REFLECTION_VIRTUAL();
+  virtual void after_reading(Version ver);
+  friend void after_reading(Field& s, Version ver);
 };
 
 template <>
@@ -82,6 +84,10 @@ inline void update_index(FieldP& f, size_t index) {
   f->index = index;
 }
 
+inline void after_reading(Field& f, Version ver) {
+  f.after_reading(ver);
+}
+
 inline String type_name(const Field&) {
   return _TYPE_("field");
 }
@@ -258,7 +264,7 @@ inline String type_name(const Value&) {
 // ----------------------------------------------------------------------------- : Utilities
 
 #define DECLARE_FIELD_TYPE(Type) \
-  DECLARE_REFLECTION(); public: \
+  DECLARE_REFLECTION_OVERRIDE(); public: \
   virtual ValueP newValue(const FieldP& thisP) const; \
   virtual StyleP newStyle(const FieldP& thisP) const; \
   virtual String typeName() const
@@ -284,14 +290,14 @@ inline String type_name(const Value&) {
   }
 
 #define DECLARE_STYLE_TYPE(Type) \
-  DECLARE_REFLECTION(); public: \
+  DECLARE_REFLECTION_OVERRIDE(); public: \
   DECLARE_HAS_FIELD(Type) \
   virtual StyleP clone() const; \
   virtual ValueViewerP makeViewer(DataViewer& parent, const StyleP& thisP); \
   virtual ValueViewerP makeEditor(DataEditor& parent, const StyleP& thisP)
 
 #define DECLARE_VALUE_TYPE(Type,ValueType_) \
-  DECLARE_REFLECTION(); public: \
+  DECLARE_REFLECTION_OVERRIDE(); public: \
   DECLARE_HAS_FIELD(Type) \
   virtual ValueP clone() const; \
   virtual String toString() const; \
diff --git a/src/data/field/choice.cpp b/src/data/field/choice.cpp
index 23e7b344..0bd98868 100644
--- a/src/data/field/choice.cpp
+++ b/src/data/field/choice.cpp
@@ -34,13 +34,14 @@ IMPLEMENT_REFLECTION(ChoiceField) {
   REFLECT_N("default", default_script);
   REFLECT(initial);
   REFLECT(default_name);
-  REFLECT_IF_READING {
-    choices->initIds();
-  }
   REFLECT(choice_colors);
   REFLECT(choice_colors_cardlist);
 }
 
+void ChoiceField::after_reading(Version ver) {
+  Field::after_reading(ver);
+  choices->initIds();
+}
 // ----------------------------------------------------------------------------- : ChoiceField::Choice
 
 ChoiceField::Choice::Choice()
@@ -142,7 +143,9 @@ IMPLEMENT_REFLECTION_ENUM(ChoiceChoiceType) {
 }
 
 IMPLEMENT_REFLECTION(ChoiceField::Choice) {
-  if (isGroup() || line_below || enabled.isScripted() || tag.isComplex()) {
+  REFLECT_IF_READING_SINGLE_VALUE {
+    REFLECT_NAMELESS(name);
+  } else {
     // complex values are groups
     REFLECT(name);
     REFLECT_N("group_choice", default_name);
@@ -150,8 +153,6 @@ IMPLEMENT_REFLECTION(ChoiceField::Choice) {
     REFLECT(line_below);
     REFLECT(enabled);
     REFLECT(type);
-  } else {
-    REFLECT_NAMELESS(name);
   }
 }
 
@@ -242,33 +243,32 @@ void ChoiceStyle::invalidate() {
 }
 
 IMPLEMENT_REFLECTION_ENUM(ChoicePopupStyle) {
-  VALUE_N("dropdown",  POPUP_DROPDOWN);
-  VALUE_N("menu",    POPUP_MENU);
-  VALUE_N("in place",  POPUP_DROPDOWN_IN_PLACE);
+  VALUE_N("dropdown", POPUP_DROPDOWN);
+  VALUE_N("menu", POPUP_MENU);
+  VALUE_N("in place", POPUP_DROPDOWN_IN_PLACE);
 }
 
 IMPLEMENT_REFLECTION_ENUM(ChoiceRenderStyle) {
-  VALUE_N("text",        RENDER_TEXT);
-  VALUE_N("image",      RENDER_IMAGE);
-  VALUE_N("both",        RENDER_BOTH);
-  VALUE_N("hidden",      RENDER_HIDDEN);
-  VALUE_N("image hidden",    RENDER_HIDDEN_IMAGE);
-  VALUE_N("checklist",    RENDER_TEXT_CHECKLIST);
-  VALUE_N("image checklist",  RENDER_IMAGE_CHECKLIST);
-  VALUE_N("both checklist",  RENDER_BOTH_CHECKLIST);
-  VALUE_N("text list",    RENDER_TEXT_LIST);
-  VALUE_N("image list",    RENDER_IMAGE_LIST);
-  VALUE_N("both list",    RENDER_BOTH_LIST);
+  VALUE_N("text", RENDER_TEXT);
+  VALUE_N("image", RENDER_IMAGE);
+  VALUE_N("both", RENDER_BOTH);
+  VALUE_N("hidden", RENDER_HIDDEN);
+  VALUE_N("image hidden", RENDER_HIDDEN_IMAGE);
+  VALUE_N("checklist", RENDER_TEXT_CHECKLIST);
+  VALUE_N("image checklist", RENDER_IMAGE_CHECKLIST);
+  VALUE_N("both checklist", RENDER_BOTH_CHECKLIST);
+  VALUE_N("text list", RENDER_TEXT_LIST);
+  VALUE_N("image list", RENDER_IMAGE_LIST);
+  VALUE_N("both list", RENDER_BOTH_LIST);
 }
 
-template <typename T> void reflect_content(T& tag,         const ChoiceStyle& cs) {}
-template <>           void reflect_content(GetMember& tag, const ChoiceStyle& cs) {
+template <typename T> void reflect_content(T& handler,         const ChoiceStyle& cs) {}
+template <>           void reflect_content(GetMember& handler, const ChoiceStyle& cs) {
   REFLECT_N("content_width",  cs.content_width);
   REFLECT_N("content_height", cs.content_height);
 }
 
 IMPLEMENT_REFLECTION(ChoiceStyle) {
-  REFLECT_ALIAS(300, "card_list_colors", "colors_card_list");
   REFLECT_BASE(Style);
   REFLECT(popup_style);
   REFLECT(render_style);
@@ -277,7 +277,7 @@ IMPLEMENT_REFLECTION(ChoiceStyle) {
   REFLECT(font);
   REFLECT(image);
   REFLECT(choice_images);
-  reflect_content(tag, *this);
+  reflect_content(handler, *this);
 }
 
 // ----------------------------------------------------------------------------- : ChoiceValue
@@ -301,7 +301,7 @@ bool ChoiceValue::update(Context& ctx) {
 }
 
 IMPLEMENT_REFLECTION_NAMELESS(ChoiceValue) {
-  if (fieldP->save_value || tag.scripting() || tag.reading()) REFLECT_NAMELESS(value);
+  if (fieldP->save_value || !handler.isWriting) REFLECT_NAMELESS(value);
 }
 
 INSTANTIATE_REFLECTION_NAMELESS(ChoiceValue)
diff --git a/src/data/field/choice.hpp b/src/data/field/choice.hpp
index 2c9a42b6..c75455d0 100644
--- a/src/data/field/choice.hpp
+++ b/src/data/field/choice.hpp
@@ -42,6 +42,7 @@ class ChoiceField : public Field {
   map<String,Color> choice_colors_cardlist;  ///< Colors for the various choices, for in the card list
   
   virtual void initDependencies(Context&, const Dependency&) const;
+  virtual void after_reading(Version ver);
 };
 
 
diff --git a/src/data/field/color.cpp b/src/data/field/color.cpp
index 6840c2b0..ce7a85c0 100644
--- a/src/data/field/color.cpp
+++ b/src/data/field/color.cpp
@@ -39,7 +39,7 @@ IMPLEMENT_REFLECTION(ColorField) {
 // ----------------------------------------------------------------------------- : ColorField::Choice
 
 IMPLEMENT_REFLECTION(ColorField::Choice) {
-  if (tag.reading() && !tag.isComplex()) {
+  REFLECT_IF_READING_SINGLE_VALUE {
     REFLECT_NAMELESS(name);
     color = parse_color(name);
   } else {
@@ -98,5 +98,5 @@ bool ColorValue::update(Context& ctx) {
 }
 
 IMPLEMENT_REFLECTION_NAMELESS(ColorValue) {
-  if (fieldP->save_value || tag.scripting() || tag.reading()) REFLECT_NAMELESS(value);
+  if (fieldP->save_value || !handler.isWriting) REFLECT_NAMELESS(value);
 }
diff --git a/src/data/field/image.cpp b/src/data/field/image.cpp
index d6da08f1..5082c0a2 100644
--- a/src/data/field/image.cpp
+++ b/src/data/field/image.cpp
@@ -39,14 +39,14 @@ String ImageValue::toString() const {
 
 // custom reflection: convert to ScriptImageP for scripting
 
-void ImageValue::reflect(Reader& tag) {
-  tag.handle(filename);
+void ImageValue::reflect(Reader& handler) {
+  handler.handle(filename);
 }
-void ImageValue::reflect(Writer& tag) {
-  if (fieldP->save_value) tag.handle(filename);
+void ImageValue::reflect(Writer& handler) {
+  if (fieldP->save_value) handler.handle(filename);
 }
-void ImageValue::reflect(GetMember& tag) {}
-void ImageValue::reflect(GetDefaultMember& tag) {
+void ImageValue::reflect(GetMember& handler) {}
+void ImageValue::reflect(GetDefaultMember& handler) {
   // convert to ScriptImageP for scripting
-  tag.handle( (ScriptValueP)make_intrusive<ImageValueToImage>(filename, last_update) );
+  handler.handle( (ScriptValueP)make_intrusive<ImageValueToImage>(filename, last_update) );
 }
diff --git a/src/data/field/package_choice.cpp b/src/data/field/package_choice.cpp
index df78831a..6002d8b6 100644
--- a/src/data/field/package_choice.cpp
+++ b/src/data/field/package_choice.cpp
@@ -67,13 +67,13 @@ bool PackageChoiceValue::update(Context& ctx) {
   return change;
 }
 
-void PackageChoiceValue::reflect(Reader& tag) {
+void PackageChoiceValue::reflect(Reader& handler) {
   REFLECT_NAMELESS(package_name);
 }
-void PackageChoiceValue::reflect(Writer& tag) {
+void PackageChoiceValue::reflect(Writer& handler) {
   REFLECT_NAMELESS(package_name);
 }
-void PackageChoiceValue::reflect(GetDefaultMember& tag) {
+void PackageChoiceValue::reflect(GetDefaultMember& handler) {
   if (package_name.empty()) {
     REFLECT_NAMELESS(package_name);
   } else if(package_name != field().initial) {
diff --git a/src/data/field/symbol.cpp b/src/data/field/symbol.cpp
index 6fde7cd1..2b7aad3f 100644
--- a/src/data/field/symbol.cpp
+++ b/src/data/field/symbol.cpp
@@ -52,5 +52,5 @@ String SymbolValue::toString() const {
 }
 
 IMPLEMENT_REFLECTION_NAMELESS(SymbolValue) {
-  if (fieldP->save_value || tag.scripting() || tag.reading()) REFLECT_NAMELESS(filename);
+  if (fieldP->save_value || !handler.isWriting) REFLECT_NAMELESS(filename);
 }
diff --git a/src/data/field/text.cpp b/src/data/field/text.cpp
index 261e6f28..46884229 100644
--- a/src/data/field/text.cpp
+++ b/src/data/field/text.cpp
@@ -97,8 +97,8 @@ void TextStyle::checkContentDependencies(Context& ctx, const Dependency& dep) co
   alignment.initDependencies(ctx, dep);
 }
 
-template <typename T> void reflect_content(T& tag,         const TextStyle& ts) {}
-template <>           void reflect_content(GetMember& tag, const TextStyle& ts) {
+template <typename T> void reflect_content(T& handler,         const TextStyle& ts) {}
+template <>           void reflect_content(GetMember& handler, const TextStyle& ts) {
   REFLECT_N("content_width",  ts.content_width);
   REFLECT_N("content_height", ts.content_height);
   REFLECT_N("content_lines",  ts.content_lines);
@@ -127,7 +127,7 @@ IMPLEMENT_REFLECTION(TextStyle) {
   REFLECT(line_height_line_max);
   REFLECT(paragraph_height);
   REFLECT(direction);
-  reflect_content(tag, *this);
+  reflect_content(handler, *this);
 }
 
 // ----------------------------------------------------------------------------- : TextValue
@@ -147,7 +147,7 @@ bool TextValue::update(Context& ctx) {
 }
 
 IMPLEMENT_REFLECTION_NAMELESS(TextValue) {
-  if (fieldP->save_value || tag.scripting() || tag.reading()) REFLECT_NAMELESS(value);
+  if (fieldP->save_value || !handler.isWriting) REFLECT_NAMELESS(value);
 }
 
 // ----------------------------------------------------------------------------- : FakeTextValue
diff --git a/src/data/game.cpp b/src/data/game.cpp
index c56e1c79..18c7882b 100644
--- a/src/data/game.cpp
+++ b/src/data/game.cpp
@@ -51,7 +51,7 @@ IMPLEMENT_REFLECTION(Game) {
   REFLECT_NO_SCRIPT(card_list_color_script);
   REFLECT_NO_SCRIPT(statistics_dimensions);
   REFLECT_NO_SCRIPT(statistics_categories);
-  REFLECT_ALIAS(308, "pack_item", "pack_type");
+  REFLECT_COMPAT(<308, "pack_item", pack_types);
   REFLECT_NO_SCRIPT(pack_types);
   REFLECT_NO_SCRIPT(keyword_match_script);
   REFLECT(has_keywords);
diff --git a/src/data/game.hpp b/src/data/game.hpp
index a54da007..593863c1 100644
--- a/src/data/game.hpp
+++ b/src/data/game.hpp
@@ -76,7 +76,7 @@ class Game : public Packaged {
   protected:
   virtual void validate(Version);
   
-  DECLARE_REFLECTION();
+  DECLARE_REFLECTION_OVERRIDE();
 };
 
 inline String type_name(const Game&) {
diff --git a/src/data/keyword.cpp b/src/data/keyword.cpp
index f05ddb41..331e123d 100644
--- a/src/data/keyword.cpp
+++ b/src/data/keyword.cpp
@@ -53,9 +53,8 @@ IMPLEMENT_REFLECTION(KeywordMode) {
 
 // backwards compatability
 template <typename T> void read_compat(T&, const Keyword*) {}
-void read_compat(Reader& tag, Keyword* k) {
+void read_compat(Reader& handler, Keyword* k) {
   if (!k->match.empty()) return;
-  if (tag.file_app_version >= 301) return; // only for versions < 0.3.1
   String separator, parameter;
   REFLECT(separator);
   REFLECT(parameter);
@@ -84,7 +83,7 @@ bool Keyword::contains(String const& query) const {
 
 IMPLEMENT_REFLECTION(Keyword) {
   REFLECT(keyword);
-  read_compat(tag, this);
+  if (handler.formatVersion() < 301) read_compat(handler, this);
   REFLECT(match);
   REFLECT(reminder);
   REFLECT(rules);
diff --git a/src/data/pack.cpp b/src/data/pack.cpp
index f3221577..1cdd3a4e 100644
--- a/src/data/pack.cpp
+++ b/src/data/pack.cpp
@@ -38,24 +38,24 @@ IMPLEMENT_REFLECTION(PackType) {
   REFLECT(select);
   REFLECT(filter);
   REFLECT(items);
-  REFLECT_IF_READING {
-    if (select == SELECT_AUTO) {
-      if (filter)              select = SELECT_NO_REPLACE;
-      else if (!items.empty()) select = SELECT_ALL;
-    }
-    if (indeterminate(summary)) {
-      if (filter)              summary = true;
-      else if (!items.empty()) summary = false;
-    }
-    if (indeterminate(selectable)) {
-      if (filter)              selectable = false;
-      else if (!items.empty()) selectable = true;
-    }
+}
+void after_reading(PackType& pt, Version) {
+  if (pt.select == SELECT_AUTO) {
+    if (pt.filter)              pt.select = SELECT_NO_REPLACE;
+    else if (!pt.items.empty()) pt.select = SELECT_ALL;
+  }
+  if (indeterminate(pt.summary)) {
+    if (pt.filter)              pt.summary = true;
+    else if (!pt.items.empty()) pt.summary = false;
+  }
+  if (indeterminate(pt.selectable)) {
+    if (pt.filter)              pt.selectable = false;
+    else if (!pt.items.empty()) pt.selectable = true;
   }
 }
 
 IMPLEMENT_REFLECTION(PackItem) {
-  if (!tag.isComplex()) {
+  REFLECT_IF_READING_SINGLE_VALUE {
     REFLECT_NAMELESS(name);
   } else {
     REFLECT(name);
diff --git a/src/data/pack.hpp b/src/data/pack.hpp
index 01142253..ac8d0d6e 100644
--- a/src/data/pack.hpp
+++ b/src/data/pack.hpp
@@ -56,6 +56,7 @@ class PackType : public IntrusivePtrBase<PackType> {
   private:
   DECLARE_REFLECTION();
 };
+void after_reading(PackType&, Version);
 
 /// An item in a PackType
 class PackItem : public IntrusivePtrBase<PackItem> {
diff --git a/src/data/set.cpp b/src/data/set.cpp
index 7be976e1..c9739ee3 100644
--- a/src/data/set.cpp
+++ b/src/data/set.cpp
@@ -167,8 +167,6 @@ void Set::validate(Version file_app_version) {
 }
 
 IMPLEMENT_REFLECTION(Set) {
-  REFLECT_ALIAS(300, "style",          "stylesheet"); // < 0.3.0 used style instead of stylesheet
-  REFLECT_ALIAS(300, "extra_set_info", "styling");
   REFLECT(game);
   if (game) {
     REFLECT_IF_READING {
@@ -176,29 +174,31 @@ IMPLEMENT_REFLECTION(Set) {
     }
     WITH_DYNAMIC_ARG(game_for_reading, game.get());
     REFLECT(stylesheet);
+    REFLECT_COMPAT(<300, "style", stylesheet);
     WITH_DYNAMIC_ARG(stylesheet_for_reading, stylesheet.get());
     REFLECT_N("set_info", data);
     if (stylesheet) {
+      REFLECT_COMPAT(<300, "extra_set_info", styling_data);
       REFLECT_N("styling", styling_data);
     }
     // Experimental: save each card to a different file
-    reflect_cards(tag);
+    reflect_cards(handler);
     REFLECT(keywords);
     REFLECT(pack_types);
   }
-  reflect_set_info_get_member(tag,data);
+  reflect_set_info_get_member(handler,data);
   REFLECT_NO_SCRIPT_N("version_control", vcs);
   REFLECT(apprentice_code);
 }
 
 // TODO: make this a more generic function to be used elsewhere
-template <typename Tag>
-void Set::reflect_cards (Tag& tag) {
+template <typename Handler>
+void Set::reflect_cards (Handler& handler) {
   REFLECT(cards);
 }
 
 template <>
-void Set::reflect_cards<Writer> (Writer& tag) {
+void Set::reflect_cards<Writer> (Writer& handler) {
   // When writing to a directory, we write each card in a separate file.
   // We don't do this in zipfiles because it leads to bloat.
   if (isZipfile()) {
@@ -251,9 +251,9 @@ void mark_dependency_member(const Set& set, const String& name, const Dependency
 }
 
 // in scripts, set.something is read from the set_info
-template <typename Tag>
-void reflect_set_info_get_member(Tag&       tag, const IndexMap<FieldP, ValueP>& data) {}
-void reflect_set_info_get_member(GetMember& tag, const IndexMap<FieldP, ValueP>& data) {
+template <typename Handler>
+void reflect_set_info_get_member(Handler&   handler, const IndexMap<FieldP, ValueP>& data) {}
+void reflect_set_info_get_member(GetMember& handler, const IndexMap<FieldP, ValueP>& data) {
   REFLECT_NAMELESS(data);
 }
 
diff --git a/src/data/set.hpp b/src/data/set.hpp
index 1946b303..cbf34f75 100644
--- a/src/data/set.hpp
+++ b/src/data/set.hpp
@@ -126,8 +126,8 @@ class Set : public Packaged {
 
   private:
   DECLARE_REFLECTION();
-  template <typename Tag>
-  void reflect_cards (Tag& tag);
+  template <typename Handler>
+  void reflect_cards(Handler& handler);
   
   /// Object for managing and executing scripts
   unique_ptr<SetScriptManager> script_manager;
diff --git a/src/data/settings.cpp b/src/data/settings.cpp
index 9b7e10c1..1b6c5b94 100644
--- a/src/data/settings.cpp
+++ b/src/data/settings.cpp
@@ -242,8 +242,6 @@ String Settings::settingsFile() {
 }
 
 IMPLEMENT_REFLECTION_NO_SCRIPT(Settings) {
-  REFLECT_ALIAS(300,         "style_settings",         "stylesheet_settings");
-  REFLECT_ALIAS(300, "default_style_settings", "default_stylesheet_settings");
   REFLECT(locale);
   REFLECT(recent_sets);
   REFLECT(default_set_dir);
@@ -264,7 +262,7 @@ IMPLEMENT_REFLECTION_NO_SCRIPT(Settings) {
   #if USE_OLD_STYLE_UPDATE_CHECKER
     REFLECT(updates_url);
   #else
-    REFLECT_IGNORE(306,"updates_url");
+    REFLECT_COMPAT_IGNORE(<306,"updates_url",String);
   #endif
   REFLECT(package_versions_url);
   REFLECT(installer_list_url);
diff --git a/src/data/stylesheet.cpp b/src/data/stylesheet.cpp
index a3541777..4acf27f0 100644
--- a/src/data/stylesheet.cpp
+++ b/src/data/stylesheet.cpp
@@ -91,16 +91,6 @@ void mark_dependency_value(const StyleSheet& stylesheet, const Dependency& dep)
 
 
 IMPLEMENT_REFLECTION(StyleSheet) {
-  // < 0.3.0 didn't use card_ prefix
-  REFLECT_ALIAS(300, "width",       "card_width");
-  REFLECT_ALIAS(300, "height",      "card_height");
-  REFLECT_ALIAS(300, "dpi",         "card_dpi");
-  REFLECT_ALIAS(300, "background",  "card_background");
-  REFLECT_ALIAS(300, "info_style",  "set_info_style");
-  REFLECT_ALIAS(300, "align",       "alignment");
-  REFLECT_ALIAS(300, "extra_field", "styling_field");
-  REFLECT_ALIAS(300, "extra_style", "styling_style");
-  
   REFLECT(game);
   REFLECT_BASE(Packaged);
   REFLECT(card_width);
diff --git a/src/data/symbol.cpp b/src/data/symbol.cpp
index b3f9764e..b761dc70 100644
--- a/src/data/symbol.cpp
+++ b/src/data/symbol.cpp
@@ -27,10 +27,10 @@ IMPLEMENT_REFLECTION(ControlPoint) {
   REFLECT_N("position",      pos);
   REFLECT_N("lock",          lock);
   REFLECT_N("line_after",    segment_after);
-  if (tag.reading() || segment_before == SEGMENT_CURVE) {
+  if (Handler::isReading || segment_before == SEGMENT_CURVE) {
     REFLECT_N("handle_before", delta_before);
   }
-  if (tag.reading() || segment_after  == SEGMENT_CURVE) {
+  if (Handler::isReading || segment_after  == SEGMENT_CURVE) {
     REFLECT_N("handle_after",  delta_after);
   }
 }
@@ -155,32 +155,28 @@ IMPLEMENT_REFLECTION_ENUM(SymbolShapeCombine) {
   VALUE_N("border",    SYMBOL_COMBINE_BORDER);
 }
 
-
-template<typename T> void fix(const T&,SymbolShape&) {}
-void fix(const Reader& reader, SymbolShape& shape) {
-  if (reader.file_app_version != Version()) return;
-  shape.updateBounds();
-  if (shape.bounds.max.x < 100 || shape.bounds.max.y < 100) return;
-  // this is a <= 0.1.2 symbol, points range [0...500] instead of [0...1]
-  // adjust it
-  FOR_EACH(p, shape.points) {
-    p->pos          /= 500.0;
-    p->delta_before /= 500.0;
-    p->delta_after  /= 500.0;
-  }
-  if (shape.name.empty()) shape.name = _("Shape");
-  shape.updateBounds();
-}
-
 IMPLEMENT_REFLECTION(SymbolShape) {
   REFLECT_BASE(SymbolPart);
   REFLECT(combine);
   REFLECT(points);
+}
+
+void after_reading(SymbolShape& shape, Version version) {
   // Fixes after reading
-  REFLECT_IF_READING {
-    // enforce constraints
-    enforceConstraints();
-    fix(tag,*this);
+  // enforce constraints
+  shape.enforceConstraints();
+  if (version == Version()) {
+    // this is a <= 0.1.2 symbol, points range [0...500] instead of [0...1]
+    shape.updateBounds();
+    if (shape.bounds.max.x < 100 || shape.bounds.max.y < 100) return;
+    // adjust it
+    FOR_EACH(p, shape.points) {
+      p->pos          /= 500.0;
+      p->delta_before /= 500.0;
+      p->delta_after  /= 500.0;
+    }
+    if (shape.name.empty()) shape.name = _("Shape");
+    shape.updateBounds();
   }
 }
 
diff --git a/src/data/symbol.hpp b/src/data/symbol.hpp
index 58384484..ce4cf9f1 100644
--- a/src/data/symbol.hpp
+++ b/src/data/symbol.hpp
@@ -220,8 +220,9 @@ class SymbolShape : public SymbolPart {
   /// Calculate the position and size of the part using the given rotation matrix
   virtual Bounds calculateBounds(const Vector2D& origin, const Matrix2D& m, bool is_identity);
   
-  DECLARE_REFLECTION();
+  DECLARE_REFLECTION_OVERRIDE();
 };
+void after_reading(SymbolShape&, Version);
 
 // ----------------------------------------------------------------------------- : SymbolGroup
 
@@ -242,7 +243,7 @@ class SymbolGroup : public SymbolPart {
   
   virtual Bounds calculateBounds(const Vector2D& origin, const Matrix2D& m, bool is_identity);
   
-  DECLARE_REFLECTION();
+  DECLARE_REFLECTION_OVERRIDE();
 };
 
 // ----------------------------------------------------------------------------- : SymbolSymmetry
@@ -273,7 +274,7 @@ class SymbolSymmetry : public SymbolGroup {
   String expectedName() const;
   virtual Bounds calculateBounds(const Vector2D& origin, const Matrix2D& m, bool is_identity);
   
-  DECLARE_REFLECTION();
+  DECLARE_REFLECTION_OVERRIDE();
 };
 
 // ----------------------------------------------------------------------------- : Symbol
@@ -287,7 +288,7 @@ class Symbol : public SymbolGroup {
   /// Determine the aspect ratio best suited for this symbol
   double aspectRatio() const;
   
-  DECLARE_REFLECTION();
+  DECLARE_REFLECTION_OVERRIDE();
 };
 
 /// A default symbol: a square
diff --git a/src/data/symbol_font.cpp b/src/data/symbol_font.cpp
index 696ca06e..3f5ad8f0 100644
--- a/src/data/symbol_font.cpp
+++ b/src/data/symbol_font.cpp
@@ -46,8 +46,6 @@ SymbolFontP SymbolFont::byName(const String& name) {
 
 IMPLEMENT_REFLECTION(SymbolFont) {
   REFLECT_BASE(Packaged);
-
-  REFLECT_ALIAS(300, "text_align", "text_alignment");
   
   REFLECT_N("image_font_size",  img_size);
   REFLECT_N("horizontal_space", spacing.width);
@@ -179,6 +177,7 @@ IMPLEMENT_REFLECTION(SymbolInFont) {
   REFLECT(draw_text);
   REFLECT(text_font);
   REFLECT(text_alignment);
+  REFLECT_COMPAT(<300,"text_align",text_alignment);
   REFLECT(text_margin_left);
   REFLECT(text_margin_right);
   REFLECT(text_margin_top);
@@ -525,18 +524,18 @@ IMPLEMENT_REFLECTION_ENUM(MenuItemType) {
   VALUE_N("code",    ITEM_CODE);
   VALUE_N("custom",  ITEM_CUSTOM);
   VALUE_N("line",    ITEM_LINE);
-  VALUE_N("submenu",  ITEM_SUBMENU);
+  VALUE_N("submenu", ITEM_SUBMENU);
 }
 
 IMPLEMENT_REFLECTION_NO_GET_MEMBER(InsertSymbolMenu) {
-  if (!items.empty() || (tag.reading() && tag.isComplex())) {
+  REFLECT_IF_READING_SINGLE_VALUE_AND(items.empty()) {
+    REFLECT_NAMELESS(name);
+  } else {
     // complex values are groups
     REFLECT(type);
     REFLECT(name);
     REFLECT(items);
-    if (!items.empty()) type = ITEM_SUBMENU;
-  } else {
-    REFLECT_NAMELESS(name);
+    if (Handler::isReading && !items.empty()) type = ITEM_SUBMENU;
   }
 }
 template <> void GetDefaultMember::handle(const InsertSymbolMenu& m) {
diff --git a/src/data/word_list.cpp b/src/data/word_list.cpp
index ce47bd04..c4405717 100644
--- a/src/data/word_list.cpp
+++ b/src/data/word_list.cpp
@@ -17,7 +17,7 @@ WordListWord::WordListWord()
 {}
 
 IMPLEMENT_REFLECTION_NO_SCRIPT(WordListWord) {
-  if (line_below || is_prefix || isGroup() || script || (tag.reading() && tag.isComplex())) {
+  REFLECT_IF_READING_SINGLE_VALUE {
     // complex value
     REFLECT(name);
     REFLECT(line_below);
diff --git a/src/render/symbol/filter.hpp b/src/render/symbol/filter.hpp
index ce71fb59..703999a7 100644
--- a/src/render/symbol/filter.hpp
+++ b/src/render/symbol/filter.hpp
@@ -67,7 +67,7 @@ class SolidFillSymbolFilter : public SymbolFilter {
   virtual bool operator == (const SymbolFilter& that) const;
   private:
   Color fill_color, border_color;
-  DECLARE_REFLECTION();
+  DECLARE_REFLECTION_OVERRIDE();
 };
 
 /// Symbol filter that returns some gradient
@@ -85,7 +85,7 @@ class GradientSymbolFilter : public SymbolFilter {
   Color color(double x, double y, SymbolSet point, const T* t) const;
   bool equal(const GradientSymbolFilter& that) const;
   
-  DECLARE_REFLECTION();
+  DECLARE_REFLECTION_OVERRIDE();
 };
 
 /// Symbol filter that returns a linear gradient
@@ -106,7 +106,7 @@ class LinearGradientSymbolFilter : public GradientSymbolFilter {
   double center_x, center_y;
   double end_x,    end_y;
   mutable double len;
-  DECLARE_REFLECTION();
+  DECLARE_REFLECTION_OVERRIDE();
 };
 
 /// Symbol filter that returns a radial gradient
diff --git a/src/util/io/get_member.cpp b/src/util/io/get_member.cpp
index 12427fff..a878b54b 100644
--- a/src/util/io/get_member.cpp
+++ b/src/util/io/get_member.cpp
@@ -36,7 +36,7 @@ GetMember::GetMember(const String& name)
   : target_name(name)
 {}
 
-// caused by the pattern: if (!tag.isComplex()) { REFLECT_NAMELESS(stuff) }
+// caused by the pattern: if (!handler.isCompound()) { REFLECT_NAMELESS(stuff) }
 template <> void GetMember::handle(const String& v) {
   throw InternalError(_("GetDefaultMember::handle"));
 }
diff --git a/src/util/io/get_member.hpp b/src/util/io/get_member.hpp
index 830f4144..5adb203c 100644
--- a/src/util/io/get_member.hpp
+++ b/src/util/io/get_member.hpp
@@ -22,13 +22,13 @@ template <typename T> class Scriptable;
 /// Find a member without a name using reflection
 /** The member is wrapped in a ScriptValue */
 class GetDefaultMember {
-  public:
-  /// Tell the reflection code we are not reading
-  inline bool reading()   const { return false; }
-  inline bool scripting() const { return true; }
-  inline bool isComplex() const { return false; }
-  inline void addAlias(int, const Char*, const Char*) {}
-  inline void handleIgnore(int, const Char*) {}
+public:
+  /// Tell the reflection code we are not looking at members
+  static constexpr bool isReading = false;
+  static constexpr bool isWriting = false;
+  static constexpr bool isScripting = false;
+  inline bool isCompound() const { return true; }
+  inline Version formatVersion() const { return app_version; }
   
   /// The result, or script_nil if the member was not found
   inline ScriptValueP result() { return value; } 
@@ -57,26 +57,26 @@ class GetDefaultMember {
   template <typename T>             void handle(const intrusive_ptr<T>& p) { value = to_script(p); }
   void handle(const ScriptValueP&);
   void handle(const ScriptP&);
-  private:
-  ScriptValueP  value;    ///< The value we found (if any)
+private:
+  ScriptValueP value;    ///< The value we found (if any)
 };
 
 // ----------------------------------------------------------------------------- : GetMember
 
 /// Find a member with a specific name using reflection
 /** The member is wrapped in a ScriptValue */
-class GetMember : private GetDefaultMember {
-  public:
+class GetMember {
+public:
   /// Construct a member getter that looks for the given name
   GetMember(const String& name);
   
-  /// Tell the reflection code we are not reading
-  inline bool reading()   const { return false; }
-  inline bool scripting() const { return true; }
-  inline bool isComplex() const { return true; }
-  inline void addAlias(int, const Char*, const Char*) {}
-  inline void handleIgnore(int, const Char*) {}
-  
+  /// Tell the reflection code we are getting a member for scripting purposes
+  static constexpr bool isReading = true;
+  static constexpr bool isWriting = false;
+  static constexpr bool isScripting = false;
+  inline bool isCompound() const { return true; }
+  inline Version formatVersion() const { return app_version; }
+
   /// The result, or script_nil if the member was not found
   inline ScriptValueP result() { return gdm.result(); } 
   
@@ -106,7 +106,7 @@ class GetMember : private GetDefaultMember {
   }
   template <typename K, typename V> void handle(const DelayedIndexMaps<K,V>&);
   template <typename K, typename V> void handle(const DelayedIndexMapsData<K,V>&);
-    
+  
   private:
   const String& target_name;  ///< The name we are looking for
   GetDefaultMember gdm;    ///< Object to store and retrieve the value
@@ -120,17 +120,17 @@ class GetMember : private GetDefaultMember {
 #define REFLECT_OBJECT_GET_DEFAULT_MEMBER_NOT(Cls)  REFLECT_WRITE_NO(Cls,GetDefaultMember)
 #define REFLECT_OBJECT_GET_MEMBER_NOT(Cls)      REFLECT_WRITE_NO(Cls,GetMember)
 
-#define REFLECT_WRITE_YES(Cls, Tag) \
-  template<> void Tag::handle<Cls>(const Cls& object) { \
+#define REFLECT_WRITE_YES(Cls, Handler) \
+  template<> void Handler::handle<Cls>(const Cls& object) { \
     const_cast<Cls&>(object).reflect(*this); \
   } \
-  void Cls::reflect(Tag& tag) { \
-    reflect_impl(tag); \
+  void Cls::reflect(Handler& handler) { \
+    reflect_impl(handler); \
   }
 
-#define REFLECT_WRITE_NO(Cls, Tag) \
-  template<> void Tag::handle<Cls>(const Cls& object) {} \
-  void Cls::reflect(Tag& tag) {}
+#define REFLECT_WRITE_NO(Cls, Handler) \
+  template<> void Handler::handle<Cls>(const Cls& object) {} \
+  void Cls::reflect(Handler& handler) {}
 
 // ----------------------------------------------------------------------------- : Reflection for enumerations
 
@@ -141,7 +141,7 @@ class GetMember : private GetDefaultMember {
     reflect_ ## Enum(const_cast<Enum&>(enum_), egm); \
   }
 
-/// 'Tag' to be used when reflecting enumerations for GetMember
+/// Handler to be used when reflecting enumerations for GetMember
 class EnumGetMember {
   public:
   inline EnumGetMember(GetDefaultMember& gdm)
diff --git a/src/util/io/package.cpp b/src/util/io/package.cpp
index 65ec9e59..fbe3aa3b 100644
--- a/src/util/io/package.cpp
+++ b/src/util/io/package.cpp
@@ -458,7 +458,7 @@ DateTime Package::modificationTime(const pair<String, FileInfo>& fi) const {
 // ----------------------------------------------------------------------------- : Packaged
 
 template <> void Reader::handle(PackageDependency& dep) {
-  if (!isComplex()) {
+  if (!isCompound()) {
     handle(dep.package);
     size_t pos = dep.package.find_first_of(_(' '));
     if (pos != String::npos) {
@@ -504,7 +504,7 @@ unique_ptr<wxInputStream> Packaged::openIconFile() {
   }
 }
 
-// proxy object, that reads just WITHOUT using the overloaded behaviour
+// proxy object, that reads just the package header WITHOUT using the overloaded behaviour
 struct JustAsPackageProxy {
   JustAsPackageProxy(Packaged* that) : that(that) {}
   Packaged* that;
@@ -524,7 +524,6 @@ void Packaged::open(const String& package, bool just_header) {
     try {
       JustAsPackageProxy proxy(this);
       reader.handle_greedy(proxy);
-      Packaged::validate(reader.file_app_version);
     } catch (const ParseError& err) {
       throw FileParseError(err.what(), absoluteFilename() + _("/") + typeName()); // more detailed message
     }
@@ -539,7 +538,6 @@ void Packaged::loadFully() {
   Reader reader(*stream, this, absoluteFilename() + _("/") + typeName());
   try {
     reader.handle_greedy(*this);
-    validate(reader.file_app_version);
     fully_loaded = true; // only after loading and validating succeeded, be careful with recursion!
   } catch (const ParseError& err) {
     throw FileParseError(err.what(), absoluteFilename() + _("/") + typeName()); // more detailed message
diff --git a/src/util/io/package.hpp b/src/util/io/package.hpp
index 61291e1b..944f1779 100644
--- a/src/util/io/package.hpp
+++ b/src/util/io/package.hpp
@@ -255,13 +255,18 @@ class Packaged : public Package {
   virtual Version fileVersion() const = 0;
 
   DECLARE_REFLECTION_VIRTUAL();
-
+  friend void after_reading(Packaged& p, Version file_app_version);
+  
   private:
   bool   fully_loaded;  ///< Is the package fully loaded?
   friend struct JustAsPackageProxy;
   friend class Installer;
 };
 
+inline void after_reading(Packaged& p, Version file_app_version) {
+  p.validate(file_app_version);
+}
+
 // ----------------------------------------------------------------------------- : IncludePackage
 
 /// A package that just contains a bunch of files that are used from other packages
diff --git a/src/util/io/reader.cpp b/src/util/io/reader.cpp
index 37960ddf..1d6a375e 100644
--- a/src/util/io/reader.cpp
+++ b/src/util/io/reader.cpp
@@ -37,12 +37,6 @@ unique_ptr<wxInputStream> Reader::openIncludedFile() {
   return package_manager.openFileFromPackage(package, value);
 }
 
-void Reader::addAlias(Version end_version, const Char* a, const Char* b) {
-  Alias& alias = aliasses[a];
-  alias.new_key     = b;
-  alias.end_version = end_version;
-}
-
 void Reader::handleIgnore(int end_version, const Char* a) {
   if (file_app_version < end_version) {
     if (enterBlock(a)) exitBlock();
@@ -243,26 +237,6 @@ void Reader::unknownKey() {
     } while (indent > expected_indent);
     return;
   }
-  // aliasses?
-  map<String,Alias>::const_iterator it = aliasses.find(key);
-  if (it != aliasses.end()) {
-    if (aliasses.find(it->second.new_key) != aliasses.end()) {
-      // alias points to another alias, don't follow it, there is the risk of infinite loops
-    } else if (it->second.end_version <= file_app_version) {
-      // alias not used for this version, use in warning
-      if (indent == expected_indent) {
-        warning(_("Unexpected key: '") + key + _("'  use  '") + it->second.new_key + _("'"), 0, false);
-        do {
-          moveNext();
-        } while (indent > expected_indent);
-        return;
-      }
-    } else {
-      // try this key instead
-      key = it->second.new_key;
-      return;
-    }
-  }
   if (indent >= expected_indent) {
     warning(_("Unexpected key: '") + key + _("'"), 0, false);
     do {
diff --git a/src/util/io/reader.hpp b/src/util/io/reader.hpp
index 79d9aca8..2f95f4eb 100644
--- a/src/util/io/reader.hpp
+++ b/src/util/io/reader.hpp
@@ -28,30 +28,25 @@ class Packaged;
  *  object that was just read.
  */
 class Reader {
-  private:
-  /// Construct a reader that reads a file in a package
-  /** Used for "include file" keys.
-   *  package can be nullptr
-   */
-  //Reader(Reader* parent, Packaged* package, const String& filename, bool ignore_invalid = false);
   public:
   /// Construct a reader that reads from the given input stream
   /** filename is used only for error messages
+   *  package is used for looking up included files.
    */
   Reader(wxInputStream& input, Packaged* package = nullptr, const String& filename = wxEmptyString, bool ignore_invalid = false);
   
   ~Reader() { showWarnings(); }
   
   /// Tell the reflection code we are reading
-  inline bool reading() const { return true; }
-  /// Tell the reflection code we are not related to scripting
-  inline bool scripting() const { return false; }
+  static constexpr bool isReading = true;
+  static constexpr bool isWriting = false;
+  static constexpr bool isScripting = false;
   /// Is the thing currently being read 'complex', i.e. does it have children
-  inline bool isComplex() const { return indent != expected_indent - 1 || value.empty(); }
-  /// Add a as an alias for b, all keys a will be replaced with b, only if file_app_version < end_version
-  void addAlias(Version end_version, const Char* a, const Char* b);
+  inline bool isCompound() const { return indent != expected_indent - 1 || value.empty(); }
   /// Ignore old keys
   void handleIgnore(int, const Char*);
+  /// Get the version of the format we are reading
+  inline Version formatVersion() const { return file_app_version; }
   
   /// Read and check the application version
   void handleAppVersion();
@@ -70,6 +65,7 @@ class Reader {
       if (state != HANDLED) unknownKey(object);
       state = OUTSIDE;
     } while (indent >= expected_indent);
+    after_reading(object, file_app_version);
   }
   
   /// Handle an object: read it if it's name matches
@@ -112,10 +108,10 @@ class Reader {
   /// The package being read from
   inline Packaged* getPackage() const { return package; }
   
+private:
   // --------------------------------------------------- : Data
   /// App version this file was made with
   Version file_app_version;
-private:
   /// The line we read
   String line;
   /// The key and value of the last line we read
@@ -133,13 +129,6 @@ private:
     HANDLED,    ///< We have handled a value, and moved to the next line, previous_value is the value we just handled
     UNHANDLED,    ///< Something has been 'unhandled()'
   } state;
-  /// Aliasses for compatability
-  struct Alias {
-    String  new_key;
-    Version end_version;
-  };
-  /// Aliasses for compatability
-  map<String, Alias> aliasses;
   /// Should all invalid keys be ignored?
   bool ignore_invalid;
   
@@ -194,6 +183,16 @@ private:
   unique_ptr<wxInputStream> openIncludedFile();
 };
 
+// ----------------------------------------------------------------------------- : After reading hook
+
+// Overload to perform extra stuff after reading
+template <typename T> inline void after_reading(T&, Version) {}
+
+template <typename T>
+inline void after_reading(intrusive_ptr<T>& x, Version ver) {
+  after_reading(*x, ver);
+}
+
 // ----------------------------------------------------------------------------- : Container types
 
 /// Construct a new type, possibly reading something in the process.
@@ -243,33 +242,33 @@ void Reader::handle(IndexMap<K,V>& m) {
 // ----------------------------------------------------------------------------- : Reflection
 
 /// Implement reflection as used by Reader
-#define REFLECT_OBJECT_READER(Cls) \
-  template<> void Reader::handle<Cls>(Cls& object) { \
-    object.reflect(*this); \
-  } \
-  void Cls::reflect(Reader& reader) { \
-    reflect_impl(reader); \
+#define REFLECT_OBJECT_READER(Cls) \
+  template<> void Reader::handle<Cls>(Cls& object) { \
+    object.reflect(*this); \
+  } \
+  void Cls::reflect(Reader& reader) { \
+    reflect_impl(reader); \
   }
 
 // ----------------------------------------------------------------------------- : Reflection for enumerations
 
 /// Implement enum reflection as used by Reader
-#define REFLECT_ENUM_READER(Enum) \
-  template<> void Reader::handle<Enum>(Enum& enum_) { \
-    EnumReader reader(getValue()); \
-    reflect_ ## Enum(enum_, reader); \
-    reader.warnIfNotDone(this); \
-  } \
-  void parse_enum(const String& value, Enum& out) { \
-    EnumReader reader(value); \
-    reflect_ ## Enum(out, reader); \
-    reader.errorIfNotDone(); \
+#define REFLECT_ENUM_READER(Enum) \
+  template<> void Reader::handle<Enum>(Enum& enum_) { \
+    EnumReader reader(getValue()); \
+    reflect_ ## Enum(enum_, reader); \
+    reader.warnIfNotDone(this); \
+  } \
+  void parse_enum(const String& value, Enum& out) { \
+    EnumReader reader(value); \
+    reflect_ ## Enum(out, reader); \
+    reader.errorIfNotDone(); \
   }
 
-/// 'Tag' to be used when reflecting enumerations for Reader
+/// 'Handler' to be used when reflecting enumerations for Reader
 class EnumReader {
   public:
-  inline EnumReader(String read)
+  inline EnumReader(String const& read)
     : read(read), first(nullptr), done(false) {}
   
   /// Handle a possible value for the enum, if the name matches the name in the input
diff --git a/src/util/io/writer.hpp b/src/util/io/writer.hpp
index b1660847..cbb9b62d 100644
--- a/src/util/io/writer.hpp
+++ b/src/util/io/writer.hpp
@@ -25,11 +25,11 @@ class Writer {
   Writer(OutputStream& output, Version file_app_version);
   
   /// Tell the reflection code we are not reading
-  inline bool reading()   const { return false; }
-  inline bool scripting() const { return false; }
-  inline bool isComplex() const { return true; }
-  inline void addAlias(int, const Char*, const Char*) {}
-  inline void handleIgnore(int, const Char*) {}
+  static constexpr bool isReading = false;
+  static constexpr bool isWriting = true;
+  static constexpr bool isScripting = false;
+  inline bool isCompound() const { return true; }
+  inline Version formatVersion() const { return app_version; }
   
   // --------------------------------------------------- : Handling objects
   /// Handle an object: write it under the given name
@@ -145,7 +145,7 @@ void Writer::handle(const IndexMap<K,V>& m) {
     reflect_ ## Enum(const_cast<Enum&>(enum_), writer); \
   }
 
-/// 'Tag' to be used when reflecting enumerations for Writer
+/// Handler to be used when reflecting enumerations for Writer
 class EnumWriter {
   public:
   inline EnumWriter(Writer& writer)
diff --git a/src/util/reflect.hpp b/src/util/reflect.hpp
index 981b2848..8bbfb321 100644
--- a/src/util/reflect.hpp
+++ b/src/util/reflect.hpp
@@ -22,32 +22,24 @@
 /// Declare that a class supports reflection
 /** Reflection allows the member variables of a class to be inspected at runtime.
  */
-#define DECLARE_REFLECTION() \
+#define DECLARE_REFLECTION_PREFIX(PREFIX,SUFFIX) \
   protected: \
-    template<class Tag> void reflect_impl(Tag& tag); \
+    template<class Handler> void reflect_impl(Handler&); \
     friend class Reader; \
     friend class Writer; \
     friend class GetDefaultMember; \
     friend class GetMember; \
-    void reflect(Reader& reader); \
-    void reflect(Writer& writer); \
-    void reflect(GetDefaultMember& gdm); \
-    void reflect(GetMember& gm)
+    PREFIX void reflect(Reader& reader) SUFFIX; \
+    PREFIX void reflect(Writer& writer) SUFFIX; \
+    PREFIX void reflect(GetDefaultMember& gdm) SUFFIX; \
+    PREFIX void reflect(GetMember& gm) SUFFIX
+
+#define DECLARE_REFLECTION() DECLARE_REFLECTION_PREFIX(,)
 
 /// Declare that a class supports reflection, which can be overridden in derived classes
-#define DECLARE_REFLECTION_VIRTUAL() \
-  protected: \
-    template<class Tag> void reflect_impl(Tag& tag); \
-    friend class Reader; \
-    friend class Writer; \
-    friend class GetDefaultMember; \
-    friend class GetMember; \
-    /* extra level of indirection between Tag::handle \
-      * and reflect_impl, to allow for virtual */ \
-    virtual void reflect(Reader& reader); \
-    virtual void reflect(Writer& writer); \
-    virtual void reflect(GetDefaultMember& gdm); \
-    virtual void reflect(GetMember& gm)
+#define DECLARE_REFLECTION_VIRTUAL() DECLARE_REFLECTION_PREFIX(virtual,)
+
+#define DECLARE_REFLECTION_OVERRIDE() DECLARE_REFLECTION_PREFIX(,override)
 
 // ----------------------------------------------------------------------------- : Implementing reflection
 
@@ -71,8 +63,8 @@
   REFLECT_OBJECT_WRITER(Cls) \
   REFLECT_OBJECT_GET_DEFAULT_MEMBER_NOT(Cls) \
   REFLECT_OBJECT_GET_MEMBER(Cls) \
-  template <class Tag> \
-  void Cls::reflect_impl(Tag& tag)
+  template <class Handler> \
+  void Cls::reflect_impl(Handler& handler)
 
 /// Implement the refelection of a class type Cls that only uses REFLECT_NAMELESS
 #define IMPLEMENT_REFLECTION_NAMELESS(Cls) \
@@ -80,16 +72,16 @@
   REFLECT_OBJECT_WRITER(Cls) \
   REFLECT_OBJECT_GET_DEFAULT_MEMBER(Cls) \
   REFLECT_OBJECT_GET_MEMBER_NOT(Cls) \
-  template <class Tag> \
-  void Cls::reflect_impl(Tag& tag)
+  template <class Handler> \
+  void Cls::reflect_impl(Handler& handler)
 
 /// Implement the refelection of a class type Cls, but only for Reader and Writer,
 /** There is custom code for GetMember and GetDefaultMember */
 #define IMPLEMENT_REFLECTION_NO_GET_MEMBER(Cls) \
   REFLECT_OBJECT_READER(Cls) \
   REFLECT_OBJECT_WRITER(Cls) \
-  template <class Tag> \
-  void Cls::reflect_impl(Tag& tag)
+  template <class Handler> \
+  void Cls::reflect_impl(Handler& handler)
 
 /// Implement the refelection of a class type Cls, but only for Reader and Writer
 /** There is no code for GetMember and GetDefaultMember */
@@ -98,18 +90,18 @@
   REFLECT_OBJECT_WRITER(Cls) \
   REFLECT_OBJECT_GET_DEFAULT_MEMBER_NOT(Cls) \
   REFLECT_OBJECT_GET_MEMBER_NOT(Cls) \
-  template <class Tag> \
-  void Cls::reflect_impl(Tag& tag)
+  template <class Handler> \
+  void Cls::reflect_impl(Handler& handler)
 
 /// Reflect a variable
-#define REFLECT(var)          tag.handle(_(#var), var)
+#define REFLECT(var)          handler.handle(_(#var), var)
 /// Reflect a variable under the given name
-#define REFLECT_N(name, var)  tag.handle(_(name), var)
+#define REFLECT_N(name, var)  handler.handle(_(name), var)
 /// Reflect a variable without a name, should be used only once per class
-#define REFLECT_NAMELESS(var) tag.handle(var)
+#define REFLECT_NAMELESS(var) handler.handle(var)
 
 /// Declare that the variables of a base class should also be reflected
-#define REFLECT_BASE(Base)    Base::reflect_impl(tag)
+#define REFLECT_BASE(Base)    Base::reflect_impl(handler)
 
 /// Reflect a group of declarations only when reading
 /** Usage:
@@ -119,7 +111,7 @@
  *   }
  *  @endcode
  */
-#define REFLECT_IF_READING    if (tag.reading())
+#define REFLECT_IF_READING if (Handler::isReading)
 
 /// Reflect a group of declarations only when *not* reading
 /** Usage:
@@ -129,24 +121,29 @@
  *   }
  *  @endcode
  */
-#define REFLECT_IF_NOT_READING  if (!tag.reading())
+#define REFLECT_IF_NOT_READING if (!Handler::isReading)
 
-/// Add an alias for backwards compatability
-/** If a key 'old' is encountered in the input file, it is interpreted as 'new' for versions < version
+/// Reflect a group of declarations only when reading and when the value is a single line value
+#define REFLECT_IF_READING_SINGLE_VALUE if (Handler::isReading && !handler.isCompound())
+
+#define REFLECT_IF_READING_SINGLE_VALUE_AND(cond) if (Handler::isReading && !handler.isCompound() && cond)
+
+/// Add an alias for backwards compatibility
+/** If a key 'name' is encountered in the input file, it is interpreted as 'var' for versions < version
  *  Example:
  *  @code
- *   REFLECT_ALIAS(300, "style", "stylesheet") // prior to 0.3.0 style was used instead of stylesheet
+ *   REFLECT_COMPAT(<300, "style", stylesheet) // prior to 0.3.0 style was used instead of stylesheet
  *  @encode
  */
-#define REFLECT_ALIAS(version, old, new) tag.addAlias(version, _(old), _(new))
+#define REFLECT_COMPAT(cond, name, var) if (handler.formatVersion() cond) REFLECT_N(name,var)
 
-/// Ignore things for backwards compatability for versions < 'version'
-#define REFLECT_IGNORE(version, old) tag.handleIgnore(version, _(old))
+/// Ignore things for backwards compatibility for versions < 'version'
+#define REFLECT_COMPAT_IGNORE(cond, name, Type) if (reflector.formatVersion() cond) {Type ignored; REFLECT_N(name,ignored);}
 
 /// Reflect a variable, ignores the variable for scripting
-#define REFLECT_NO_SCRIPT(var)          tag.handleNoScript(_(#var), var)
+#define REFLECT_NO_SCRIPT(var)          handler.handleNoScript(_(#var), var)
 /// Reflect a variable under the given name
-#define REFLECT_NO_SCRIPT_N(name, var)  tag.handleNoScript(_(name), var)
+#define REFLECT_NO_SCRIPT_N(name, var)  handler.handleNoScript(_(name), var)
 
 /// Explicitly instantiate reflection; this is occasionally required.
 #define INSTANTIATE_REFLECTION(Class) \
@@ -178,17 +175,17 @@
  *   - GetDefaultMember::handle(const Enum&)
  */
 #define IMPLEMENT_REFLECTION_ENUM(Enum) \
-  template <class Tag> \
-  void reflect_ ## Enum (Enum& enum_, Tag& tag); \
+  template <class Handler> \
+  void reflect_ ## Enum (Enum& enum_, Handler& handler); \
   REFLECT_ENUM_READER(Enum) \
   REFLECT_ENUM_WRITER(Enum) \
   REFLECT_ENUM_GET_MEMBER(Enum) \
-  template <class Tag> \
-  void reflect_ ## Enum (Enum& enum_, Tag& tag)
+  template <class Handler> \
+  void reflect_ ## Enum (Enum& enum_, Handler& handler)
 
 /// Declare a possible value of an enum
-#define VALUE(val) tag.handle(_(#val), val, enum_)
+#define VALUE(val) handler.handle(_(#val), val, enum_)
 
 /// Declare a possible value of an enum under the given name
-#define VALUE_N(name, val) tag.handle(_(name), val, enum_)
+#define VALUE_N(name, val) handler.handle(_(name), val, enum_)