diff --git a/lib/schemable/relationship_schema_generator.rb b/lib/schemable/relationship_schema_generator.rb
new file mode 100644
index 0000000..f8b7e6e
--- /dev/null
+++ b/lib/schemable/relationship_schema_generator.rb
@@ -0,0 +1,66 @@
+module Schemable
+  class RelationshipSchemaGenerator
+    attr_accessor :model_definition, :schema_modifier, :configuration, :relationships, :expand, :relationships_to_exclude_from_expansion
+
+    def initialize(model_definition, relationships_to_exclude_from_expansion: [], expand: false)
+      @expand = expand
+      @model_definition = model_definition
+      @schema_modifier = SchemaModifier.new
+      @configuration = Schemable.configuration
+      @relationships = model_definition.relationships
+      @relationships_to_exclude_from_expansion = relationships_to_exclude_from_expansion
+    end
+
+    def generate
+      return {} if @relationships.blank? || @relationships == { belongs_to: {}, has_many: {} }
+
+      schema = {
+        type: :object,
+        properties: {}
+      }
+
+      %i[belongs_to has_many].each do |relation_type|
+        @relationships[relation_type]&.each do |relation, definition|
+          non_expanded_data_properties = {
+            type: :object,
+            properties: {
+              meta: {
+                type: :object,
+                properties: {
+                  included: { type: :boolean, default: false }
+                }
+              }
+            }
+          }
+
+          result = {
+            type: :object,
+            properties: {
+              data: {
+                type: :object,
+                properties: {
+                  id: { type: :string },
+                  type: { type: :string, default: definition[:definition].model_name }
+                }
+              }
+            }
+          }
+
+          result = non_expanded_data_properties if !expand || @relationships_to_exclude_from_expansion.include?(definition[:definition].model_name)
+
+          schema[:properties].merge!(relation => result)
+        end
+      end
+
+      # Modify the schema to include additional response relations
+      schema = @schema_modifier.add_properties(schema, @model_definition.additional_response_relations, 'properties')
+
+      # Modify the schema to exclude response relations
+      @model_definition.excluded_response_relations.each do |key|
+        schema = @schema_modifier.delete_properties(schema, "properties.#{key}")
+      end
+
+      schema
+    end
+  end
+end
diff --git a/sig/schemable/relationship_schema_generator.rbs b/sig/schemable/relationship_schema_generator.rbs
new file mode 100644
index 0000000..9c1d7e5
--- /dev/null
+++ b/sig/schemable/relationship_schema_generator.rbs
@@ -0,0 +1,14 @@
+module Schemable
+  class RelationshipSchemaGenerator
+    attr_accessor expand: bool
+    attr_accessor model_definition: Definition
+    attr_accessor configuration: Configuration
+    attr_accessor schema_modifier: SchemaModifier
+    attr_accessor relationships: Hash[Symbol, any]
+    attr_accessor relationships_to_exclude_from_expansion: Array[String]
+
+    def initialize: (Definition, ?relationships_to_exclude_from_expansion: Array[String], ?expand: bool) -> void
+
+    def generate: -> (Hash[Symbol, any] | Array[Hash[Symbol, any]])
+  end
+end