From: Rich Bowen <rbowen@apache.org>
Date: Sat, 2 May 2026 20:51:27 +0000 (+0000)
Subject: Bug 66648: Document AddOutputFilterByType context merging behavior (additive within... 
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ee0146a547c8f80c2ed9d521f54b84b3251dbfea;p=thirdparty%2Fapache%2Fhttpd.git

Bug 66648: Document AddOutputFilterByType context merging behavior (additive within context, replaces across contexts)

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1933734 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/docs/manual/mod/mod_filter.xml b/docs/manual/mod/mod_filter.xml
index d08cf64aac..d41680d729 100644
--- a/docs/manual/mod/mod_filter.xml
+++ b/docs/manual/mod/mod_filter.xml
@@ -294,6 +294,26 @@ being moved to <module>mod_filter</module> in version 2.3.7</compatibility>
 &lt;/Location&gt;
     </highlight>
 
+    <p>Note that <directive>AddOutputFilterByType</directive> directives
+    within the same context are additive, but a definition in a more
+    specific context (such as a
+    <directive type="section" module="core">VirtualHost</directive>,
+    <directive type="section" module="core">Directory</directive>, or
+    <directive type="section" module="core">Location</directive> section)
+    will replace — not add to — any definitions inherited from a
+    broader context. This is the same behavior as
+    <directive module="mod_mime">AddOutputFilter</directive>.</p>
+
+    <highlight language="config">
+# Server context: compress text/html and text/plain
+AddOutputFilterByType DEFLATE text/html text/plain
+&lt;VirtualHost *:80&gt;
+    # Replaces the server-level definition for this vhost;
+    # only text/css will be compressed here:
+    AddOutputFilterByType DEFLATE text/css
+&lt;/VirtualHost&gt;
+    </highlight>
+
 </usage>
 
 <seealso><directive module="mod_mime">AddOutputFilter</directive></seealso>