diff --git a/adl/stdlib/sys/adlast2.adl b/adl/stdlib/sys/adlast2.adl
index c7e32a60..fe959840 100644
--- a/adl/stdlib/sys/adlast2.adl
+++ b/adl/stdlib/sys/adlast2.adl
@@ -16,13 +16,6 @@ struct ScopedName
     Ident name;
 };
 
-union TypeRef
-{
-    Ident primitive;
-    Ident typeParam;
-    ScopedName reference;
-};
-
 struct TypeExpr<R>
 {
     R typeRef;
@@ -112,4 +105,43 @@ struct Spanned<T> {
   Span span;
 };
 
+union PrimitiveType {
+  Void Void;
+  Void Bool;
+  Void Int8;
+  Void Int16;
+  Void Int32;
+  Void Int64;
+  Void Word8;
+  Void Word16;
+  Void Word32;
+  Void Word64;
+  Void Float;
+  Void Double;
+  Void Json;
+  Void ByteVector;
+  Void String;
+  Void Vector;
+  Void StringMap;
+  Void Nullable;
+  Void TypeToken;
+};
+
+union TypeRef {
+  ScopedName scopedName;
+  Ident localName;
+  PrimitiveType primitive;
+  Ident typeParam;
+};
+
+// AST after initial parsing
+type TypeExpr0 = TypeExpr<ScopedName>;
+type Module0 = Module<TypeExpr0>;
+
+
+// AST after name resolution
+type TypeExpr1 = TypeExpr<TypeRef>;
+type Decl1 = Decl<TypeExpr1>;
+type Module1 = Module<TypeExpr1>;
+
 };
diff --git a/rust/compiler/src/adlgen/sys/adlast2.rs b/rust/compiler/src/adlgen/sys/adlast2.rs
index 28fb7c85..960d9d85 100644
--- a/rust/compiler/src/adlgen/sys/adlast2.rs
+++ b/rust/compiler/src/adlgen/sys/adlast2.rs
@@ -28,18 +28,6 @@ impl ScopedName {
   }
 }
 
-#[derive(Clone,Debug,Deserialize,Eq,Hash,PartialEq,Serialize)]
-pub enum TypeRef {
-  #[serde(rename="primitive")]
-  Primitive(Ident),
-
-  #[serde(rename="typeParam")]
-  TypeParam(Ident),
-
-  #[serde(rename="reference")]
-  Reference(ScopedName),
-}
-
 #[derive(Clone,Debug,Deserialize,Eq,Hash,PartialEq,Serialize)]
 pub struct TypeExpr<R> {
   #[serde(rename="typeRef")]
@@ -279,3 +267,69 @@ impl<T> Spanned<T> {
     }
   }
 }
+
+#[derive(Clone,Debug,Deserialize,Eq,Hash,PartialEq,Serialize)]
+pub enum PrimitiveType {
+  Void,
+
+  Bool,
+
+  Int8,
+
+  Int16,
+
+  Int32,
+
+  Int64,
+
+  Word8,
+
+  Word16,
+
+  Word32,
+
+  Word64,
+
+  Float,
+
+  Double,
+
+  Json,
+
+  ByteVector,
+
+  String,
+
+  Vector,
+
+  StringMap,
+
+  Nullable,
+
+  TypeToken,
+}
+
+#[derive(Clone,Debug,Deserialize,Eq,Hash,PartialEq,Serialize)]
+pub enum TypeRef {
+  #[serde(rename="scopedName")]
+  ScopedName(ScopedName),
+
+  #[serde(rename="localName")]
+  LocalName(Ident),
+
+  #[serde(rename="primitive")]
+  Primitive(PrimitiveType),
+
+  #[serde(rename="typeParam")]
+  TypeParam(Ident),
+}
+
+pub type TypeExpr0 = TypeExpr<ScopedName>;
+
+pub type Module0 = Module<TypeExpr0>;
+
+pub type TypeExpr1 = TypeExpr<TypeRef>;
+
+pub type Decl1 = Decl<TypeExpr1>;
+
+pub type Module1 = Module<TypeExpr1>;
diff --git a/rust/compiler/src/processing/primitives.rs b/rust/compiler/src/processing/primitives.rs
index 629f76a0..146c413b 100644
--- a/rust/compiler/src/processing/primitives.rs
+++ b/rust/compiler/src/processing/primitives.rs
@@ -1,73 +1,50 @@
-#[derive(serde::Serialize)]
-pub enum PrimitiveType {
-    Void,
-    Bool,
-    Int8,
-    Int16,
-    Int32,
-    Int64,
-    Word8,
-    Word16,
-    Word32,
-    Word64,
-    Float,
-    Double,
-    Json,
-    ByteVector,
-    String,
-    Vector,
-    StringMap,
-    Nullable,
-    TypeToken,
-}
+use crate::adlgen::sys::adlast2::PrimitiveType;
 
-impl PrimitiveType {
-    pub fn to_str(&self) -> &str {
-        match self {
-            PrimitiveType::Void => "Void",
-            PrimitiveType::Bool => "Bool",
-            PrimitiveType::Int8 => "Int8",
-            PrimitiveType::Int16 => "Int16",
-            PrimitiveType::Int32 => "Int32",
-            PrimitiveType::Int64 => "Int64",
-            PrimitiveType::Word8 => "Word8",
-            PrimitiveType::Word16 => "Word16",
-            PrimitiveType::Word32 => "Word32",
-            PrimitiveType::Word64 => "Word64",
-            PrimitiveType::Float => "Float",
-            PrimitiveType::Double => "Double",
-            PrimitiveType::Json => "Json",
-            PrimitiveType::ByteVector => "ByteVector",
-            PrimitiveType::String => "String",
-            PrimitiveType::Vector => "Vector",
-            PrimitiveType::StringMap => "StringMap",
-            PrimitiveType::Nullable => "Nullable",
-            PrimitiveType::TypeToken => "TypeToken",
-        }
+pub fn str_from_prim(prim: PrimitiveType) -> &'static str {
+    match prim {
+        PrimitiveType::Void => "Void",
+        PrimitiveType::Bool => "Bool",
+        PrimitiveType::Int8 => "Int8",
+        PrimitiveType::Int16 => "Int16",
+        PrimitiveType::Int32 => "Int32",
+        PrimitiveType::Int64 => "Int64",
+        PrimitiveType::Word8 => "Word8",
+        PrimitiveType::Word16 => "Word16",
+        PrimitiveType::Word32 => "Word32",
+        PrimitiveType::Word64 => "Word64",
+        PrimitiveType::Float => "Float",
+        PrimitiveType::Double => "Double",
+        PrimitiveType::Json => "Json",
+        PrimitiveType::ByteVector => "ByteVector",
+        PrimitiveType::String => "String",
+        PrimitiveType::Vector => "Vector",
+        PrimitiveType::StringMap => "StringMap",
+        PrimitiveType::Nullable => "Nullable",
+        PrimitiveType::TypeToken => "TypeToken",
     }
+}
 
-    pub fn from_str(s: &str) -> Option<Self> {
-        match s {
-            "Void" => Some(Self::Void),
-            "Bool" => Some(Self::Bool),
-            "Int8" => Some(Self::Int8),
-            "Int16" => Some(Self::Int16),
-            "Int32" => Some(Self::Int32),
-            "Int64" => Some(Self::Int64),
-            "Word8" => Some(Self::Word8),
-            "Word16" => Some(Self::Word16),
-            "Word32" => Some(Self::Word32),
-            "Word64" => Some(Self::Word64),
-            "Float" => Some(Self::Float),
-            "Double" => Some(Self::Double),
-            "Json" => Some(Self::Json),
-            "ByteVector" => Some(Self::ByteVector),
-            "String" => Some(Self::String),
-            "Vector" => Some(Self::Vector),
-            "StringMap" => Some(Self::StringMap),
-            "Nullable" => Some(Self::Nullable),
-            "TypeToken" => Some(Self::TypeToken),
-            _ => None,
-        }
+pub fn prim_from_str(s: &str) -> Option<PrimitiveType> {
+    match s {
+        "Void" => Some(PrimitiveType::Void),
+        "Bool" => Some(PrimitiveType::Bool),
+        "Int8" => Some(PrimitiveType::Int8),
+        "Int16" => Some(PrimitiveType::Int16),
+        "Int32" => Some(PrimitiveType::Int32),
+        "Int64" => Some(PrimitiveType::Int64),
+        "Word8" => Some(PrimitiveType::Word8),
+        "Word16" => Some(PrimitiveType::Word16),
+        "Word32" => Some(PrimitiveType::Word32),
+        "Word64" => Some(PrimitiveType::Word64),
+        "Float" => Some(PrimitiveType::Float),
+        "Double" => Some(PrimitiveType::Double),
+        "Json" => Some(PrimitiveType::Json),
+        "ByteVector" => Some(PrimitiveType::ByteVector),
+        "String" => Some(PrimitiveType::String),
+        "Vector" => Some(PrimitiveType::Vector),
+        "StringMap" => Some(PrimitiveType::StringMap),
+        "Nullable" => Some(PrimitiveType::Nullable),
+        "TypeToken" => Some(PrimitiveType::TypeToken),
+        _ => None,
     }
 }
diff --git a/rust/compiler/src/processing/resolver.rs b/rust/compiler/src/processing/resolver.rs
index 128b777e..5eb17818 100644
--- a/rust/compiler/src/processing/resolver.rs
+++ b/rust/compiler/src/processing/resolver.rs
@@ -1,11 +1,10 @@
-use serde::Serialize;
 use std::collections::{HashMap, HashSet};
 
 use crate::adlgen::sys::adlast2 as adlast;
 use crate::adlrt::custom::sys::types::map::Map;
 
 use super::loader::AdlLoader;
-use super::primitives::PrimitiveType;
+use super::primitives::{prim_from_str, str_from_prim};
 use super::{Module0, TypeExpr0};
 
 type Result<T> = std::result::Result<T, ResolveError>;
@@ -20,18 +19,12 @@ pub enum ResolveError {
     LoadFailed,
 }
 
-pub type TypeExpr1 = adlast::TypeExpr<TypeRef>;
-pub type Decl1 = adlast::Decl<TypeExpr1>;
-pub type Module1 = adlast::Module<TypeExpr1>;
+pub type TypeRef = adlast::TypeRef;
+pub type TypeExpr1 = adlast::TypeExpr1;
+pub type Decl1 = adlast::Decl1;
+pub type Module1 = adlast::Module1;
 pub type ModuleName = adlast::ModuleName;
 
-#[derive(Serialize)]
-pub enum TypeRef {
-    ScopedName(adlast::ScopedName),
-    Primitive(PrimitiveType),
-    TypeParam(adlast::Ident),
-}
-
 pub struct Resolver {
     loader: Box<dyn AdlLoader>,
     modules: HashMap<ModuleName, Module1>,
@@ -299,14 +292,11 @@ impl<'a> ResolveCtx<'a> {
             if self.type_params.contains(name.as_str()) {
                 return Ok(TypeRef::TypeParam(name.clone()));
             }
-            if let Some(ptype) = PrimitiveType::from_str(&name) {
+            if let Some(ptype) = prim_from_str(&name) {
                 return Ok(TypeRef::Primitive(ptype));
             }
             if self.module0.decls.contains_key(name) {
-                return Ok(TypeRef::ScopedName(adlast::ScopedName::new(
-                    self.module0.name.value.clone(),
-                    name.clone(),
-                )));
+                return Ok(TypeRef::LocalName(name.clone()));
             }
             if let Some(scoped_name) = self.expanded_imports.get(name) {
                 return Ok(TypeRef::ScopedName(scoped_name.clone()));