diff -r 96d551b90734 -r 2c66ab45d91e pvl/web/application.py
--- a/pvl/web/application.py	Mon Jan 21 18:39:53 2013 +0200
+++ b/pvl/web/application.py	Mon Jan 21 18:40:09 2013 +0200
@@ -10,14 +10,17 @@
 
 class Application (object) :
     """
-        Main state.
+        Main wsgi entry point state.
     """
 
     URLS = None
 
-    def __init__ (self, urls=None) :
+    # TODO: charset
+
+    def __init__ (self, urls=None, layout=None) :
         """
                 urls        - werkzeug.routing.Map -> Handler
+                layout      - template with {TITLE} and {HEAD} and {BODY}
         """
 
         if not urls :
@@ -25,7 +28,8 @@
 
         if not urls :
             raise ValueError("No URLS/urls=... given")
-
+        
+        self.layout = layout
         self.urls = urls
 
     def respond (self, request) :
@@ -121,22 +125,33 @@
         """
 
         title = self.title()
-
-        return html.html(
-            html.head(
-                html.title(title),
+        head = html(
                 (
                     html.link(rel='Stylesheet', type="text/css", href=src) for src in self.CSS
                 ), 
                 (
                     html.script(src=src, type='text/javascript', _selfclosing=False) for src in self.JS
                 ),
-            ),
-            html.body(
-                html.h1(title),
-                self.render() 
+        )
+        body = html(self.render())
+
+        if self.app.layout :
+            return self.app.layout.format(
+                TITLE   = unicode(title),
+                HEAD    = unicode(head),
+                BODY    = unicode(body),
             )
-        )
+        else :
+            return html.document(html.html(
+                html.head(
+                    html.title(title),
+                    head,
+                ),
+                html.body(
+                    html.h1(title),
+                    body,
+                )
+            ))
 
     def process (self, **params) :
         """
@@ -159,8 +174,7 @@
             return response
         
         # render as html per default
-        render = self.render_html()
-        text = unicode(html.document(render))
+        text = unicode(self.render_html())
 
         return Response(text, mimetype='text/html')