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diff --git a/source/blender/nodes/NOD_socket_declarations.hh b/source/blender/nodes/NOD_socket_declarations.hh
new file mode 100644
index 00000000000..639d2c12d73
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+++ b/source/blender/nodes/NOD_socket_declarations.hh
@@ -0,0 +1,239 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#pragma once
+
+#include "NOD_node_declaration.hh"
+
+#include "RNA_types.h"
+
+#include "BLI_color.hh"
+#include "BLI_float3.hh"
+
+namespace blender::nodes::decl {
+
+class Float : public SocketDeclaration {
+ private:
+  float default_value_ = 0.0f;
+  float soft_min_value_ = -FLT_MAX;
+  float soft_max_value_ = FLT_MAX;
+  PropertySubType subtype_ = PROP_NONE;
+
+ public:
+  Float &min(const float value)
+  {
+    soft_min_value_ = value;
+    return *this;
+  }
+
+  Float &max(const float value)
+  {
+    soft_max_value_ = value;
+    return *this;
+  }
+
+  Float &default_value(const float value)
+  {
+    default_value_ = value;
+    return *this;
+  }
+
+  Float &subtype(PropertySubType subtype)
+  {
+    subtype_ = subtype;
+    return *this;
+  }
+
+  bNodeSocket &build(bNodeTree &ntree, bNode &node, eNodeSocketInOut in_out) const override;
+  bool matches(const bNodeSocket &socket) const override;
+  bNodeSocket &update_or_build(bNodeTree &ntree, bNode &node, bNodeSocket &socket) const override;
+};
+
+class Int : public SocketDeclaration {
+ private:
+  int default_value_ = 0;
+  int soft_min_value_ = INT32_MIN;
+  int soft_max_value_ = INT32_MAX;
+  PropertySubType subtype_ = PROP_NONE;
+
+ public:
+  Int &min(const int value)
+  {
+    soft_min_value_ = value;
+    return *this;
+  }
+
+  Int &max(const int value)
+  {
+    soft_max_value_ = value;
+    return *this;
+  }
+
+  Int &default_value(const int value)
+  {
+    default_value_ = value;
+    return *this;
+  }
+
+  Int &subtype(PropertySubType subtype)
+  {
+    subtype_ = subtype;
+    return *this;
+  }
+
+  bNodeSocket &build(bNodeTree &ntree, bNode &node, eNodeSocketInOut in_out) const override;
+  bool matches(const bNodeSocket &socket) const override;
+  bNodeSocket &update_or_build(bNodeTree &ntree, bNode &node, bNodeSocket &socket) const override;
+};
+
+class Vector : public SocketDeclaration {
+ private:
+  float3 default_value_ = {0, 0, 0};
+  PropertySubType subtype_ = PROP_NONE;
+
+ public:
+  Vector &default_value(const float3 value)
+  {
+    default_value_ = value;
+    return *this;
+  }
+
+  Vector &subtype(PropertySubType subtype)
+  {
+    subtype_ = subtype;
+    return *this;
+  }
+
+  bNodeSocket &build(bNodeTree &ntree, bNode &node, eNodeSocketInOut in_out) const override;
+  bool matches(const bNodeSocket &socket) const override;
+  bNodeSocket &update_or_build(bNodeTree &ntree, bNode &node, bNodeSocket &socket) const override;
+};
+
+class Bool : public SocketDeclaration {
+ private:
+  bool default_value_ = false;
+
+ public:
+  Bool &default_value(const bool value)
+  {
+    default_value_ = value;
+    return *this;
+  }
+
+  bNodeSocket &build(bNodeTree &ntree, bNode &node, eNodeSocketInOut in_out) const override;
+  bool matches(const bNodeSocket &socket) const override;
+};
+
+class Color : public SocketDeclaration {
+ private:
+  ColorGeometry4f default_value_;
+
+ public:
+  Color &default_value(const ColorGeometry4f value)
+  {
+    default_value_ = value;
+    return *this;
+  }
+
+  bNodeSocket &build(bNodeTree &ntree, bNode &node, eNodeSocketInOut in_out) const override;
+  bool matches(const bNodeSocket &socket) const override;
+};
+
+class String : public SocketDeclaration {
+ public:
+  bNodeSocket &build(bNodeTree &ntree, bNode &node, eNodeSocketInOut in_out) const override;
+  bool matches(const bNodeSocket &socket) const override;
+};
+
+namespace detail {
+struct CommonIDSocketData {
+  const char *idname;
+  bool hide_label = false;
+};
+
+bNodeSocket &build_id_socket(bNodeTree &ntree,
+                             bNode &node,
+                             eNodeSocketInOut in_out,
+                             const CommonIDSocketData &data,
+                             StringRefNull name,
+                             StringRefNull identifier);
+bool matches_id_socket(const bNodeSocket &socket,
+                       const CommonIDSocketData &data,
+                       StringRefNull name,
+                       StringRefNull identifier);
+
+template<typename Subtype> class IDSocketDeclaration : public SocketDeclaration {
+ private:
+  CommonIDSocketData data_;
+
+ public:
+  IDSocketDeclaration(const char *idname) : data_({idname})
+  {
+  }
+
+  Subtype &hide_label(bool value)
+  {
+    data_.hide_label = value;
+    return *(Subtype *)this;
+  }
+
+  bNodeSocket &build(bNodeTree &ntree, bNode &node, eNodeSocketInOut in_out) const override
+  {
+    return build_id_socket(ntree, node, in_out, data_, name_, identifier_);
+  }
+
+  bool matches(const bNodeSocket &socket) const override
+  {
+    return matches_id_socket(socket, data_, name_, identifier_);
+  }
+};
+}  // namespace detail
+
+class Object : public detail::IDSocketDeclaration<Object> {
+ public:
+  Object() : detail::IDSocketDeclaration<Object>("NodeSocketObject")
+  {
+  }
+};
+
+class Material : public detail::IDSocketDeclaration<Material> {
+ public:
+  Material() : detail::IDSocketDeclaration<Material>("NodeSocketMaterial")
+  {
+  }
+};
+
+class Collection : public detail::IDSocketDeclaration<Collection> {
+ public:
+  Collection() : detail::IDSocketDeclaration<Collection>("NodeSocketCollection")
+  {
+  }
+};
+
+class Texture : public detail::IDSocketDeclaration<Texture> {
+ public:
+  Texture() : detail::IDSocketDeclaration<Texture>("NodeSocketTexture")
+  {
+  }
+};
+
+class Geometry : public SocketDeclaration {
+ public:
+  bNodeSocket &build(bNodeTree &ntree, bNode &node, eNodeSocketInOut in_out) const override;
+  bool matches(const bNodeSocket &socket) const override;
+};
+
+}  // namespace blender::nodes::decl