diff --git a/doc/SUMMARY.md b/doc/SUMMARY.md
index 0564015e..84760108 100644
--- a/doc/SUMMARY.md
+++ b/doc/SUMMARY.md
@@ -27,6 +27,7 @@
     * [Static Resources](ring/static.md)
     * [Dynamic Extensions](ring/dynamic_extensions.md)
     * [Data-driven Middleware](ring/data_driven_middleware.md)
+    * [Transformations Middleware Chain](ring/transformating_middleware_chain.md)
     * [Middleware Registry](ring/middleware_registry.md)
     * [Default Middleware](ring/default_middleware.md)
     * [Pluggable Coercion](ring/coercion.md)
diff --git a/doc/images/swagger.png b/doc/images/swagger.png
index 46d28517..9d5a55b8 100644
Binary files a/doc/images/swagger.png and b/doc/images/swagger.png differ
diff --git a/doc/ring/README.md b/doc/ring/README.md
index f215c0f7..66f776d6 100644
--- a/doc/ring/README.md
+++ b/doc/ring/README.md
@@ -6,6 +6,7 @@
 * [Static Resources](static.md)
 * [Dynamic Extensions](dynamic_extensions.md)
 * [Data-driven Middleware](data_driven_middleware.md)
+* [Transformations Middleware Chain](transformating_middleware_chain.md)
 * [Middleware Registry](middleware_registry.md)
 * [Default Middleware](default_middleware.md)
 * [Pluggable Coercion](coercion.md)
diff --git a/doc/ring/data_driven_middleware.md b/doc/ring/data_driven_middleware.md
index 005be53b..439c1804 100644
--- a/doc/ring/data_driven_middleware.md
+++ b/doc/ring/data_driven_middleware.md
@@ -88,49 +88,8 @@ All the middleware are applied correctly:
 
 Middleware can be optimized against an endpoint using [middleware compilation](compiling_middleware.md).
 
-## Transforming the middleware chain
-
-There is an extra option in ring-router (actually, in the undelaying middleware-router): `:reitit.middleware/transform` to transform the middleware chain per endpoint. It sees the vector of compiled middleware and should return a new vector of middleware.
-
-#### Adding debug middleware between all other middleware
-
-```clj
-(def app
-  (ring/ring-handler
-    (ring/router
-      ["/api" {:middleware [[wrap 1] [wrap2 2]]}
-       ["/ping" {:get {:middleware [[wrap3 3]]
-                       :handler handler}}]]
-      {::middleware/transform #(interleave % (repeat [wrap :debug]))})))
-```
-
-```clj
-(app {:request-method :get, :uri "/api/ping"})
-; {:status 200, :body [1 :debug 2 :debug 3 :debug :handler]}
-```
-
-#### Reversing the middleware chain
-
-```clj
-(def app
-  (ring/ring-handler
-    (ring/router
-      ["/api" {:middleware [[wrap 1] [wrap2 2]]}
-       ["/ping" {:get {:middleware [[wrap3 3]]
-                       :handler handler}}]]
-      {::middleware/transform reverse)})))
-```
-
-```clj
-(app {:request-method :get, :uri "/api/ping"})
-; {:status 200, :body [3 2 1 :handler]}
-```
-
 ## Ideas for the future
 
-* Re-package all useful middleware into (optimized) data-driven Middleware
-   * just package or a new community-repo with rehosting stuff?
-* Support `Keyword` expansion into Middleware, enabling external Middleware Registries (duct/integrant/macchiato -style)
 * Support Middleware dependency resolution with new keys `:requires` and `:provides`. Values are set of top-level keys of the request. e.g.
    * `InjectUserIntoRequestMiddleware` requires `#{:session}` and provides `#{:user}`
    * `AuthorizationMiddleware` requires `#{:user}`
diff --git a/doc/ring/swagger.md b/doc/ring/swagger.md
index 23ed2855..05e3a037 100644
--- a/doc/ring/swagger.md
+++ b/doc/ring/swagger.md
@@ -108,80 +108,95 @@ Swagger-ui:
 
 ### More complete example
 
-* `clojure.spec` and `Schema` coercion
-* swagger data (`:tags`, `:produces`, `:consumes`)
-* swagger-spec served from  `"/api/swagger.json"`
+* `clojure.spec` coercion
+* swagger data (`:tags`, `:produces`, `:summary`)
+* swagger-spec served from  `"/swagger.json"`
 * swagger-ui mounted to `"/"`
-* [Muuntaja](https://github.com/metosin/muuntaja) for request & response formatting
-* `wrap-params` to capture query & path parameters
+* set of middleware for content negotiation, exceptions, multipart etc.
 * missed routes are handled by `create-default-handler`
 * served via [ring-jetty](https://github.com/ring-clojure/ring/tree/master/ring-jetty-adapter)
 
 Whole example project is in [`/examples/ring-swagger`](https://github.com/metosin/reitit/tree/master/examples/ring-swagger).
 
 ```clj
-(require '[reitit.ring :as ring]
-(require '[reitit.swagger :as swagger]
-(require '[reitit.swagger-ui :as swagger-ui]
-;; coercion
-(require '[reitit.ring.coercion :as rrc]
-(require '[reitit.coercion.spec :as spec]
-(require '[reitit.coercion.schema :as schema]
-(require '[schema.core :refer [Int]]
-;; web server
-(require '[ring.adapter.jetty :as jetty]
-(require '[ring.middleware.params]
-(require '[muuntaja.middleware]))
+(ns example.server
+  (:require [reitit.ring :as ring]
+            [reitit.swagger :as swagger]
+            [reitit.swagger-ui :as swagger-ui]
+            [reitit.ring.coercion :as coercion]
+            [reitit.coercion.spec]
+            [reitit.ring.middleware.muuntaja :as muuntaja]
+            [reitit.ring.middleware.exception :as exception]
+            [reitit.ring.middleware.multipart :as multipart]
+            [ring.middleware.params :as params]
+            [ring.adapter.jetty :as jetty]
+            [muuntaja.core :as m]
+            [clojure.java.io :as io]))
 
 (def app
   (ring/ring-handler
     (ring/router
-      ["/api"
-      
-       ["/swagger.json"
+      [["/swagger.json"
         {:get {:no-doc true
                :swagger {:info {:title "my-api"}}
                :handler (swagger/create-swagger-handler)}}]
 
-       ["/spec"
-        {:coercion spec/coercion
-         :swagger {:tags ["spec"]}}
+       ["/files"
+        {:swagger {:tags ["files"]}}
+
+        ["/upload"
+         {:post {:summary "upload a file"
+                 :parameters {:multipart {:file multipart/temp-file-part}}
+                 :responses {200 {:body {:file multipart/temp-file-part}}}
+                 :handler (fn [{{{:keys [file]} :multipart} :parameters}]
+                            {:status 200
+                             :body {:file file}})}}]
+
+        ["/download"
+         {:get {:summary "downloads a file"
+                :swagger {:produces ["image/png"]}
+                :handler (fn [_]
+                           {:status 200
+                            :headers {"Content-Type" "image/png"}
+                            :body (io/input-stream (io/resource "reitit.png"))})}}]]
+
+       ["/math"
+        {:swagger {:tags ["math"]}}
 
         ["/plus"
-         {:get {:summary "plus with spec"
+         {:get {:summary "plus with spec query parameters"
                 :parameters {:query {:x int?, :y int?}}
                 :responses {200 {:body {:total int?}}}
                 :handler (fn [{{{:keys [x y]} :query} :parameters}]
                            {:status 200
-                            :body {:total (+ x y)}})}}]]
+                            :body {:total (+ x y)}})}
+          :post {:summary "plus with spec body parameters"
+                 :parameters {:body {:x int?, :y int?}}
+                 :responses {200 {:body {:total int?}}}
+                 :handler (fn [{{{:keys [x y]} :body} :parameters}]
+                            {:status 200
+                             :body {:total (+ x y)}})}}]]]
 
-       ["/schema"
-        {:coercion schema/coercion
-         :swagger {:tags ["schema"]}}
-
-        ["/plus"
-         {:get {:summary "plus with schema"
-                :parameters {:query {:x Int, :y Int}}
-                :responses {200 {:body {:total Int}}}
-                :handler (fn [{{{:keys [x y]} :query} :parameters}]
-                           {:status 200
-                            :body {:total (+ x y)}})}}]]]
-
-      {:data {:middleware [ring.middleware.params/wrap-params
-                           muuntaja.middleware/wrap-format
-                           swagger/swagger-feature
-                           rrc/coerce-exceptions-middleware
-                           rrc/coerce-request-middleware
-                           rrc/coerce-response-middleware]
-              :swagger {:produces #{"application/json"
-                                    "application/edn"
-                                    "application/transit+json"}
-                        :consumes #{"application/json"
-                                    "application/edn"
-                                    "application/transit+json"}}}})
+      {:data {:coercion reitit.coercion.spec/coercion
+              :muuntaja m/instance
+              :middleware [;; query-params & form-params
+                           params/wrap-params
+                           ;; content-negotiation
+                           muuntaja/format-negotiate-middleware
+                           ;; encoding response body
+                           muuntaja/format-response-middleware
+                           ;; exception handling
+                           exception/exception-middleware
+                           ;; decoding request body
+                           muuntaja/format-request-middleware
+                           ;; coercing response bodys
+                           coercion/coerce-response-middleware
+                           ;; coercing request parameters
+                           coercion/coerce-request-middleware
+                           ;; multipart
+                           multipart/multipart-middleware]}})
     (ring/routes
-      (swagger-ui/create-swagger-ui-handler
-        {:path "/", :url "/api/swagger.json"})
+      (swagger-ui/create-swagger-ui-handler {:path "/"})
       (ring/create-default-handler))))
 
 (defn start []
@@ -242,7 +257,6 @@ Example with:
 
 ### TODO
 
-* create a data-driven version of [Muuntaja](https://github.com/metosin/muuntaja) that integrates into `:produces` and `:consumes`
 * ClojureScript
   * example for [Macchiato](https://github.com/macchiato-framework)
   * body formatting
diff --git a/doc/ring/transforming_middleware_chain.md b/doc/ring/transforming_middleware_chain.md
new file mode 100644
index 00000000..6179bffb
--- /dev/null
+++ b/doc/ring/transforming_middleware_chain.md
@@ -0,0 +1,37 @@
+# Transformation Middleware Chain
+
+There is an extra option in ring-router (actually, in the underlying middleware-router): `:reitit.middleware/transform` to transform the middleware chain per endpoint. It gets the vector of compiled middleware and should return a new vector of middleware.
+
+## Adding debug middleware between all other middleware
+
+```clj
+(def app
+  (ring/ring-handler
+    (ring/router
+      ["/api" {:middleware [[wrap 1] [wrap2 2]]}
+       ["/ping" {:get {:middleware [[wrap3 3]]
+                       :handler handler}}]]
+      {::middleware/transform #(interleave % (repeat [wrap :debug]))})))
+```
+
+```clj
+(app {:request-method :get, :uri "/api/ping"})
+; {:status 200, :body [1 :debug 2 :debug 3 :debug :handler]}
+```
+
+## Reversing the middleware chain
+
+```clj
+(def app
+  (ring/ring-handler
+    (ring/router
+      ["/api" {:middleware [[wrap 1] [wrap2 2]]}
+       ["/ping" {:get {:middleware [[wrap3 3]]
+                       :handler handler}}]]
+      {::middleware/transform reverse)})))
+```
+
+```clj
+(app {:request-method :get, :uri "/api/ping"})
+; {:status 200, :body [3 2 1 :handler]}
+```
diff --git a/modules/reitit-middleware/src/reitit/ring/middleware/muuntaja.clj b/modules/reitit-middleware/src/reitit/ring/middleware/muuntaja.clj
index 28e02e8f..faa44e2c 100644
--- a/modules/reitit-middleware/src/reitit/ring/middleware/muuntaja.clj
+++ b/modules/reitit-middleware/src/reitit/ring/middleware/muuntaja.clj
@@ -63,7 +63,7 @@
               (if muuntaja
                 {:data {:swagger {:consumes (displace (m/decodes muuntaja))}}
                  :wrap #(muuntaja.middleware/wrap-format-request % muuntaja)}))})
-©
+
 (def format-response-middleware
   "Middleware for response formatting.