diff --git a/cpp/arcticdb/entity/types_proto.cpp b/cpp/arcticdb/entity/types_proto.cpp
index 10a385892a9..5fd69d7e8ad 100644
--- a/cpp/arcticdb/entity/types_proto.cpp
+++ b/cpp/arcticdb/entity/types_proto.cpp
@@ -21,4 +21,106 @@ namespace arcticdb::entity {
     }
 
 
+
+    arcticdb::proto::descriptors::SortedValue sorted_value_to_proto(SortedValue sorted) {
+        switch (sorted) {
+        case SortedValue::UNSORTED:
+            return arcticdb::proto::descriptors::SortedValue::UNSORTED;
+        case SortedValue::DESCENDING:
+            return arcticdb::proto::descriptors::SortedValue::DESCENDING;
+        case SortedValue::ASCENDING:
+            return arcticdb::proto::descriptors::SortedValue::ASCENDING;
+        default:
+            return arcticdb::proto::descriptors::SortedValue::UNKNOWN;
+        }
+    }
+
+    SortedValue sorted_value_from_proto(arcticdb::proto::descriptors::SortedValue sorted_proto) {
+        switch (sorted_proto) {
+        case arcticdb::proto::descriptors::SortedValue::UNSORTED:
+            return SortedValue::UNSORTED;
+        case arcticdb::proto::descriptors::SortedValue::DESCENDING:
+            return SortedValue::DESCENDING;
+        case arcticdb::proto::descriptors::SortedValue::ASCENDING:
+            return SortedValue::ASCENDING;
+        default:
+            return SortedValue::UNKNOWN;
+        }
+    }
+
+
+    void set_data_type(DataType data_type, arcticdb::proto::descriptors::TypeDescriptor& type_desc) {
+        type_desc.set_size_bits(
+            static_cast<arcticdb::proto::descriptors::TypeDescriptor_SizeBits>(
+                static_cast<std::uint8_t>(slice_bit_size(data_type))));
+        type_desc.set_value_type(
+            static_cast<arcticdb::proto::descriptors::TypeDescriptor_ValueType>(
+                static_cast<std::uint8_t>(slice_value_type(data_type))));
+    }
+
+
+    [[nodiscard]]
+    auto to_proto(const TypeDescriptor& desc)
+        -> arcticdb::proto::descriptors::TypeDescriptor
+    {
+        arcticdb::proto::descriptors::TypeDescriptor output;
+        output.set_dimension(static_cast<std::uint32_t>(desc.dimension_));
+        set_data_type(desc.data_type_, output);
+
+        return output;
+    }
+
+
+
+    DataType get_data_type(const arcticdb::proto::descriptors::TypeDescriptor& type_desc) {
+        return combine_data_type(
+            static_cast<ValueType>(static_cast<uint8_t>(type_desc.value_type())),
+            static_cast<SizeBits>(static_cast<uint8_t>(type_desc.size_bits()))
+        );
+    }
+
+    TypeDescriptor type_desc_from_proto(const arcticdb::proto::descriptors::TypeDescriptor& type_desc) {
+        return {
+            combine_data_type(
+                static_cast<ValueType>(static_cast<uint8_t>(type_desc.value_type())),
+                static_cast<SizeBits>(static_cast<uint8_t>(type_desc.size_bits()))
+            ),
+            static_cast<Dimension>(static_cast<uint8_t>(type_desc.dimension()))
+        };
+    }
+
+    DataType data_type_from_proto(const arcticdb::proto::descriptors::TypeDescriptor& type_desc) {
+        return type_desc_from_proto(type_desc).data_type();
+    }
+
+
+    arcticdb::proto::descriptors::StreamDescriptor_FieldDescriptor field_proto(DataType dt, Dimension dim, std::string_view name) {
+        arcticdb::proto::descriptors::StreamDescriptor_FieldDescriptor output;
+        if (!name.empty())
+            output.set_name(name.data(), name.size());
+
+        auto output_desc = output.mutable_type_desc();
+        output_desc->set_dimension(static_cast<uint32_t>(dim));
+        output_desc->set_size_bits(static_cast<arcticdb::proto::descriptors::TypeDescriptor_SizeBits>(
+            static_cast<std::uint8_t>(slice_bit_size(dt))));
+
+        output_desc->set_value_type(
+            static_cast<arcticdb::proto::descriptors::TypeDescriptor_ValueType>(
+                static_cast<std::uint8_t>(slice_value_type(dt))));
+
+        return output;
+    }
+
+    void set_id(arcticdb::proto::descriptors::StreamDescriptor& pb_desc, StreamId id) {
+        std::visit([&pb_desc](auto&& arg) {
+            using IdType = std::decay_t<decltype(arg)>;
+            if constexpr (std::is_same_v<IdType, NumericId>)
+                pb_desc.set_num_id(arg);
+            else if constexpr (std::is_same_v<IdType, StringId>)
+                pb_desc.set_str_id(arg);
+            else
+                util::raise_rte("Encoding unknown descriptor type");
+            }, id);
+    }
+
 } // namespace arcticdb
diff --git a/cpp/arcticdb/entity/types_proto.hpp b/cpp/arcticdb/entity/types_proto.hpp
index 62a36132635..fe993be9a4f 100644
--- a/cpp/arcticdb/entity/types_proto.hpp
+++ b/cpp/arcticdb/entity/types_proto.hpp
@@ -24,94 +24,22 @@ namespace arcticdb::entity {
 
 
 
-    inline arcticdb::proto::descriptors::SortedValue sorted_value_to_proto(SortedValue sorted) {
-        switch (sorted) {
-        case SortedValue::UNSORTED:
-            return arcticdb::proto::descriptors::SortedValue::UNSORTED;
-        case SortedValue::DESCENDING:
-            return arcticdb::proto::descriptors::SortedValue::DESCENDING;
-        case SortedValue::ASCENDING:
-            return arcticdb::proto::descriptors::SortedValue::ASCENDING;
-        default:
-            return arcticdb::proto::descriptors::SortedValue::UNKNOWN;
-        }
-    }
-
-    inline SortedValue sorted_value_from_proto(arcticdb::proto::descriptors::SortedValue sorted_proto) {
-        switch (sorted_proto) {
-        case arcticdb::proto::descriptors::SortedValue::UNSORTED:
-            return SortedValue::UNSORTED;
-        case arcticdb::proto::descriptors::SortedValue::DESCENDING:
-            return SortedValue::DESCENDING;
-        case arcticdb::proto::descriptors::SortedValue::ASCENDING:
-            return SortedValue::ASCENDING;
-        default:
-            return SortedValue::UNKNOWN;
-        }
-    }
+    arcticdb::proto::descriptors::SortedValue sorted_value_to_proto(SortedValue sorted);
 
+    SortedValue sorted_value_from_proto(arcticdb::proto::descriptors::SortedValue sorted_proto);
 
-    inline void set_data_type(DataType data_type, arcticdb::proto::descriptors::TypeDescriptor& type_desc) {
-        type_desc.set_size_bits(
-            static_cast<arcticdb::proto::descriptors::TypeDescriptor_SizeBits>(
-                static_cast<std::uint8_t>(slice_bit_size(data_type))));
-        type_desc.set_value_type(
-            static_cast<arcticdb::proto::descriptors::TypeDescriptor_ValueType>(
-                static_cast<std::uint8_t>(slice_value_type(data_type))));
-    }
 
+    void set_data_type(DataType data_type, arcticdb::proto::descriptors::TypeDescriptor& type_desc);
 
-    [[nodiscard]]
-    inline auto to_proto(const TypeDescriptor& desc)
-        -> arcticdb::proto::descriptors::TypeDescriptor
-    {
-        arcticdb::proto::descriptors::TypeDescriptor output;
-        output.set_dimension(static_cast<std::uint32_t>(desc.dimension_));
-        set_data_type(desc.data_type_, output);
 
-        return output;
-    }
+    DataType get_data_type(const arcticdb::proto::descriptors::TypeDescriptor& type_desc);
 
+    TypeDescriptor type_desc_from_proto(const arcticdb::proto::descriptors::TypeDescriptor& type_desc);
 
+    DataType data_type_from_proto(const arcticdb::proto::descriptors::TypeDescriptor& type_desc);
 
-    inline DataType get_data_type(const arcticdb::proto::descriptors::TypeDescriptor& type_desc) {
-        return combine_data_type(
-            static_cast<ValueType>(static_cast<uint8_t>(type_desc.value_type())),
-            static_cast<SizeBits>(static_cast<uint8_t>(type_desc.size_bits()))
-        );
-    }
 
-    inline TypeDescriptor type_desc_from_proto(const arcticdb::proto::descriptors::TypeDescriptor& type_desc) {
-        return {
-            combine_data_type(
-                static_cast<ValueType>(static_cast<uint8_t>(type_desc.value_type())),
-                static_cast<SizeBits>(static_cast<uint8_t>(type_desc.size_bits()))
-            ),
-            static_cast<Dimension>(static_cast<uint8_t>(type_desc.dimension()))
-        };
-    }
-
-    inline DataType data_type_from_proto(const arcticdb::proto::descriptors::TypeDescriptor& type_desc) {
-        return type_desc_from_proto(type_desc).data_type();
-    }
-
-
-    inline arcticdb::proto::descriptors::StreamDescriptor_FieldDescriptor field_proto(DataType dt, Dimension dim, std::string_view name) {
-        arcticdb::proto::descriptors::StreamDescriptor_FieldDescriptor output;
-        if (!name.empty())
-            output.set_name(name.data(), name.size());
-
-        auto output_desc = output.mutable_type_desc();
-        output_desc->set_dimension(static_cast<uint32_t>(dim));
-        output_desc->set_size_bits(static_cast<arcticdb::proto::descriptors::TypeDescriptor_SizeBits>(
-            static_cast<std::uint8_t>(slice_bit_size(dt))));
-
-        output_desc->set_value_type(
-            static_cast<arcticdb::proto::descriptors::TypeDescriptor_ValueType>(
-                static_cast<std::uint8_t>(slice_value_type(dt))));
-
-        return output;
-    }
+    arcticdb::proto::descriptors::StreamDescriptor_FieldDescriptor field_proto(DataType dt, Dimension dim, std::string_view name);
 
 
 
@@ -160,7 +88,7 @@ namespace arcticdb::entity {
 
         ARCTICDB_MOVE_COPY_DEFAULT(IndexDescriptor)
 
-            friend bool operator==(const IndexDescriptor& left, const IndexDescriptor& right) {
+        friend bool operator==(const IndexDescriptor& left, const IndexDescriptor& right) {
             return left.type() == right.type();
         }
     };
@@ -185,17 +113,7 @@ namespace arcticdb::entity {
         }
     }
 
-    inline void set_id(arcticdb::proto::descriptors::StreamDescriptor& pb_desc, StreamId id) {
-        std::visit([&pb_desc](auto&& arg) {
-            using IdType = std::decay_t<decltype(arg)>;
-            if constexpr (std::is_same_v<IdType, NumericId>)
-                pb_desc.set_num_id(arg);
-            else if constexpr (std::is_same_v<IdType, StringId>)
-                pb_desc.set_str_id(arg);
-            else
-                util::raise_rte("Encoding unknown descriptor type");
-            }, id);
-    }
+    void set_id(arcticdb::proto::descriptors::StreamDescriptor& pb_desc, StreamId id);
 
 } // namespace arcticdb::entity