From 5f2bf54c136c4231bc8233c50c12b18dbdc227b7 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Thu, 18 Jul 2013 15:36:13 -0700
Subject: [PATCH] Updated Grouped rendering (markdown)

---
 Grouped-rendering.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Grouped-rendering.md b/Grouped-rendering.md
index ab115b4..c7d878f 100644
--- a/Grouped-rendering.md
+++ b/Grouped-rendering.md
@@ -1,5 +1,7 @@
 Using "grouped rendering" on a layer renders all styles of one layer for all features that have the same value before proceeding to other features that have a different value.
 
+This feature was added in https://github.com/mapnik/mapnik/pull/916 and is first available in Mapnik v2.1.0.
+
 Example syntax looks like:
 
 ```xml
@@ -48,4 +50,3 @@ Example of rendering from one layer without and with the `group-by` on z order:
 
 [[/images/grouped-rendering.png]]
 
-