diff --git a/include/caosdb/data_type.h b/include/caosdb/data_type.h
index 22358fcda808c8ebf93c140156ba7e39c5757e8d..e6b92d53d6ddb1aa8360af55f6438d23eafff7ae 100644
--- a/include/caosdb/data_type.h
+++ b/include/caosdb/data_type.h
@@ -179,14 +179,14 @@ public:
   [[nodiscard]] inline auto IsAtomic() const noexcept -> bool {
     return this->wrapped->data_type_case() == DataTypeCase::kAtomicDataType;
   }
-  [[nodiscard]] inline auto AsAtomic() const noexcept -> AtomicDataType {
+  [[nodiscard]] inline auto GetAsAtomic() const noexcept -> AtomicDataType {
     return static_cast<AtomicDataType>(this->wrapped->atomic_data_type());
   }
 
   [[nodiscard]] inline auto IsReference() const noexcept -> bool {
     return this->wrapped->data_type_case() == DataTypeCase::kReferenceDataType;
   }
-  [[nodiscard]] inline auto AsReference() const noexcept -> const ReferenceDataType & {
+  [[nodiscard]] inline auto GetAsReference() const noexcept -> const ReferenceDataType & {
     if (!IsReference()) {
       return ReferenceDataType::GetEmptyInstance();
     } else if (reference_data_type == nullptr) {
@@ -200,7 +200,7 @@ public:
     return this->wrapped->data_type_case() == DataTypeCase::kListDataType;
   }
 
-  [[nodiscard]] inline auto AsList() const noexcept -> const ListDataType & {
+  [[nodiscard]] inline auto GetAsList() const noexcept -> const ListDataType & {
     if (!IsList()) {
       return ListDataType::GetEmptyInstance();
     } else if (list_data_type == nullptr) {
diff --git a/test/test_data_type.cpp b/test/test_data_type.cpp
index bb2e97ba412d52a979e060f2d9920d591c07e9e8..51624a7e0513f4654f2eaa9fdf3519399726199d 100644
--- a/test/test_data_type.cpp
+++ b/test/test_data_type.cpp
@@ -53,17 +53,17 @@ TEST(test_data_type, test_atomic) {
     // the different AtomicDataType are associated with integers
     entity.SetDataType(map_el.first);
     EXPECT_TRUE(entity.GetDataType().IsAtomic());
-    EXPECT_EQ(entity.GetDataType().AsAtomic(), map_el.first);
+    EXPECT_EQ(entity.GetDataType().GetAsAtomic(), map_el.first);
 
     proto_data_type.set_atomic_data_type(static_cast<ProtoAtomicDataType>(map_el.first));
     DataType data_type(&proto_data_type);
     entity.SetDataType(data_type);
 
     EXPECT_FALSE(data_type.IsReference());
-    EXPECT_EQ(data_type.AsReference().GetName(), std::basic_string<char>(""));
+    EXPECT_EQ(data_type.GetAsReference().GetName(), std::basic_string<char>(""));
     EXPECT_FALSE(data_type.IsList());
     EXPECT_TRUE(data_type.IsAtomic());
-    EXPECT_EQ(data_type.AsAtomic(), map_el.first);
+    EXPECT_EQ(data_type.GetAsAtomic(), map_el.first);
   }
 }
 
@@ -74,7 +74,7 @@ TEST(test_data_type, test_reference) {
   entity.SetRole(Role::PROPERTY);
   entity.SetDataType("Person");
   EXPECT_TRUE(entity.GetDataType().IsReference());
-  EXPECT_EQ(entity.GetDataType().AsReference().GetName(), "Person");
+  EXPECT_EQ(entity.GetDataType().GetAsReference().GetName(), "Person");
 
   proto_data_type.mutable_reference_data_type()->set_name("Person");
   DataType data_type(&proto_data_type);
@@ -83,7 +83,7 @@ TEST(test_data_type, test_reference) {
   EXPECT_TRUE(data_type.IsReference());
   EXPECT_FALSE(data_type.IsList());
   EXPECT_FALSE(data_type.IsAtomic());
-  EXPECT_EQ(data_type.AsReference().GetName(), "Person");
+  EXPECT_EQ(data_type.GetAsReference().GetName(), "Person");
 }
 
 TEST(test_data_type, test_list_of_atomic) {
@@ -93,7 +93,7 @@ TEST(test_data_type, test_list_of_atomic) {
     EXPECT_FALSE(data_type.IsReference());
     EXPECT_FALSE(data_type.IsAtomic());
     EXPECT_TRUE(data_type.IsList());
-    const auto &list_data_type = data_type.AsList();
+    const auto &list_data_type = data_type.GetAsList();
     EXPECT_EQ(list_data_type.GetReferenceDataType().GetName(), std::basic_string<char>(""));
     EXPECT_TRUE(list_data_type.IsListOfAtomic());
     EXPECT_FALSE(list_data_type.IsListOfReference());
@@ -108,7 +108,7 @@ TEST(test_data_type, test_list_of_reference) {
   EXPECT_FALSE(data_type.IsAtomic());
   EXPECT_TRUE(data_type.IsList());
 
-  const auto &list_data_type = data_type.AsList();
+  const auto &list_data_type = data_type.GetAsList();
   EXPECT_TRUE(list_data_type.IsListOfReference());
   EXPECT_FALSE(list_data_type.IsListOfAtomic());
   const auto *wrapped = list_data_type.GetReferenceDataType().GetWrapped();
diff --git a/test/test_entity.cpp b/test/test_entity.cpp
index 9e256d5418b53d5a1901df430098f104b5d85f05..75adc7e7a051cc1e2a154d6b3723e44123e28130 100644
--- a/test/test_entity.cpp
+++ b/test/test_entity.cpp
@@ -83,12 +83,12 @@ TEST(test_entity, test_property_setters) {
   EXPECT_EQ(prop.GetValue().GetAsString(), "prop_value");
   EXPECT_EQ(prop.GetUnit(), "prop_unit");
   EXPECT_TRUE(prop.GetDataType().IsReference());
-  EXPECT_EQ(prop.GetDataType().AsReference().GetName(), "prop_dtype");
+  EXPECT_EQ(prop.GetDataType().GetAsReference().GetName(), "prop_dtype");
   EXPECT_FALSE(prop.GetDataType().IsList());
 
   prop.SetDataType(AtomicDataType::DATETIME);
   EXPECT_TRUE(prop.GetDataType().IsAtomic());
-  EXPECT_EQ(prop.GetDataType().AsAtomic(), AtomicDataType::DATETIME);
+  EXPECT_EQ(prop.GetDataType().GetAsAtomic(), AtomicDataType::DATETIME);
   EXPECT_FALSE(prop.GetDataType().IsList());
 }
 
@@ -97,16 +97,16 @@ TEST(test_entity, test_list_property_setters) {
 
   prop.SetDataType(AtomicDataType::DATETIME); // Set as atomic first.
   EXPECT_TRUE(prop.GetDataType().IsAtomic());
-  EXPECT_EQ(prop.GetDataType().AsAtomic(), AtomicDataType::DATETIME);
+  EXPECT_EQ(prop.GetDataType().GetAsAtomic(), AtomicDataType::DATETIME);
 
   prop.SetDataType(AtomicDataType::DOUBLE, true);
   auto const &dtype = prop.GetDataType();
   EXPECT_FALSE(dtype.IsAtomic()); // Should not be true anymore.
   EXPECT_FALSE(dtype.IsReference());
   EXPECT_TRUE(dtype.IsList());
-  EXPECT_NE(dtype.AsAtomic(), AtomicDataType::DATETIME); // Should be overwritten.
-  EXPECT_TRUE(dtype.AsList().IsListOfAtomic());
-  EXPECT_EQ(dtype.AsList().GetAtomicDataType(), AtomicDataType::DOUBLE);
+  EXPECT_NE(dtype.GetAsAtomic(), AtomicDataType::DATETIME); // Should be overwritten.
+  EXPECT_TRUE(dtype.GetAsList().IsListOfAtomic());
+  EXPECT_EQ(dtype.GetAsList().GetAtomicDataType(), AtomicDataType::DOUBLE);
 }
 
 TEST(test_entity, test_append_property) {
@@ -200,7 +200,7 @@ TEST(test_entity, test_insert_with_role) {
 
   EXPECT_EQ(entity.GetRole(), Role::PROPERTY);
   EXPECT_TRUE(entity.GetDataType().IsAtomic());
-  EXPECT_EQ(entity.GetDataType().AsAtomic(), AtomicDataType::DOUBLE);
+  EXPECT_EQ(entity.GetDataType().GetAsAtomic(), AtomicDataType::DOUBLE);
   EXPECT_EQ(entity.GetName(), "Length");
   EXPECT_EQ(entity.GetUnit(), "m");
   EXPECT_TRUE(entity.GetValue().IsDouble());
diff --git a/test/test_list_properties.cpp b/test/test_list_properties.cpp
index 75ae98dc1d33e0a1b2b32381816f2be0ac735f29..27d0aad53cb9eb1342e1cb87ca24d7c3b71938f0 100644
--- a/test/test_list_properties.cpp
+++ b/test/test_list_properties.cpp
@@ -52,8 +52,8 @@ TEST(test_list_property, test_list_of_text) {
   const auto &value = entity.GetProperties().at(0).GetValue();
 
   EXPECT_TRUE(data_type.IsList());
-  EXPECT_TRUE(data_type.AsList().IsListOfAtomic());
-  EXPECT_EQ(data_type.AsList().GetAtomicDataType(), AtomicDataType::TEXT);
+  EXPECT_TRUE(data_type.GetAsList().IsListOfAtomic());
+  EXPECT_EQ(data_type.GetAsList().GetAtomicDataType(), AtomicDataType::TEXT);
 
   EXPECT_TRUE(value.IsVector());
   EXPECT_EQ(value.GetAsVector().size(), 3);
diff --git a/test/test_protobuf.cpp b/test/test_protobuf.cpp
index 43ab6883b42f1dca1c2785103f6a274eb2b2f1bc..6f9bda0740487db475f1e34757e4a612c59061f9 100644
--- a/test/test_protobuf.cpp
+++ b/test/test_protobuf.cpp
@@ -102,10 +102,10 @@ TEST(test_protobuf, test_copy_nested) {
   EXPECT_EQ(entity_destination.data_type().reference_data_type().name(), "src_per");
 
   Entity entity(&entity_destination);
-  EXPECT_EQ(entity.GetDataType().AsReference().GetName(), "src_per");
+  EXPECT_EQ(entity.GetDataType().GetAsReference().GetName(), "src_per");
 
   const Entity &copy_entity(entity);
-  EXPECT_EQ(copy_entity.GetDataType().AsReference().GetName(), "src_per");
+  EXPECT_EQ(copy_entity.GetDataType().GetAsReference().GetName(), "src_per");
 }
 
 } // namespace caosdb