docs: Remove the last remaining XML files

11 files changed, 0 insertions, 865 deletions

diff --git a/docs/reference/gtk/gtk4-broadwayd.xml b/docs/reference/gtk/gtk4-broadwayd.xml
deleted file mode 100644
index 4c6450944d..0000000000
--- a/docs/reference/gtk/gtk4-broadwayd.xml
+++ /dev/null
@@ -1,84 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-broadwayd">
-
-<refentryinfo>
-  <title>gtk4-broadwayd</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Alexander</firstname>
-      <surname>Larsson</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-broadwayd</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-broadwayd</refname>
-  <refpurpose>Broadway display server</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-broadwayd</command>
-<arg choice="opt">--port <replaceable>PORT</replaceable></arg>
-<arg choice="opt">--address <replaceable>ADDRESS</replaceable></arg>
-<arg choice="opt">--unixsocket <replaceable>ADDRESS</replaceable></arg>
-<arg choice="opt"><replaceable>:DISPLAY</replaceable></arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-<command>gtk4-broadwayd</command> is a display server for the Broadway
-GDK backend. It allows multiple GTK applications to display their
-windows in the same web browser, by connecting to gtk4-broadwayd.
-</para>
-<para>
-When using gtk4-broadwayd, specify the display number to use, prefixed
-with a colon, similar to X. The default display number is 0.
-<programlisting>
-gtk4-broadwayd :5
-</programlisting>
-Then point your web browser at <literal>http://127.0.0.1:8085</literal>.
-Start your applications like this:
-<programlisting>
-GDK_BACKEND=broadway BROADWAY_DISPLAY=:5 gtk4-demo
-</programlisting>
-</para>
-</refsect1>
-
-<refsect1><title>Options</title>
-<variablelist>
-  <varlistentry>
-    <term>--port</term>
-    <listitem><para>Use <replaceable>PORT</replaceable> as the HTTP
-      port, instead of the default 8080 + (<replaceable>DISPLAY</replaceable> - 1).
-      </para></listitem>
-  </varlistentry>
-  <varlistentry>
-    <term>--address</term>
-    <listitem><para>Use <replaceable>ADDRESS</replaceable> as the HTTP
-      address, instead of the default <literal>http://127.0.0.1:<replaceable>PORT</replaceable></literal>.
-      </para></listitem>
-  </varlistentry>
-  <varlistentry>
-    <term>--unixsocket</term>
-    <listitem><para>Use <replaceable>ADDRESS</replaceable> as the unix domain socket
-      address. This option overrides <literal>--address</literal> and <literal>--port</literal>.
-      It is available only on Unix-like systems.
-      </para></listitem>
-  </varlistentry>
-</variablelist>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-builder-tool.xml b/docs/reference/gtk/gtk4-builder-tool.xml
deleted file mode 100644
index c6c6d1ae70..0000000000
--- a/docs/reference/gtk/gtk4-builder-tool.xml
+++ /dev/null
@@ -1,110 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-builder-tool">
-
-<refentryinfo>
-  <title>gtk4-builder-tool</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Matthias</firstname>
-      <surname>Clasen</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-builder-tool</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-builder-tool</refname>
-  <refpurpose>GtkBuilder file utility</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-builder-tool</command>
-<arg choice="opt"><replaceable>COMMAND</replaceable></arg>
-<arg choice="opt" rep="repeat"><replaceable>OPTION</replaceable></arg>
-<arg choice="plain"><replaceable>FILE</replaceable></arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-  <command>gtk4-builder-tool</command> can perform various operations
-  on GtkBuilder .ui files.
-</para>
-<para>
-  The <option>validate</option> command validates the .ui file and reports
-  errors to stderr.
-</para>
-<para>
-  The <option>enumerate</option> command lists all the named objects that
-  are created in the .ui file.
-</para>
-<para>
-  The <option>preview</option> command displays the .ui file. This command
-  accepts options to specify the ID of the toplevel object and a .css file
-  to use.
-</para>
-<para>
-  The <option>simplify</option> command simplifies the .ui file by removing
-  properties that are set to their default values and writes the resulting XML
-  to stdout, or back to the input file.
-</para>
-<para>
-  When the <option>--3to4</option> is specified, <option>simplify</option>
-  interprets the input as a GTK 3 ui file and attempts to convert it to GTK 4
-  equivalents. It performs various conversions, such as renaming properties,
-  translating child properties to layout properties, rewriting the setup for
-  GtkNotebook, GtkStack, GtkAssistant  or changing toolbars into boxes.
-</para>
-<para>
-  You should always test the modified .ui files produced by gtk4-builder-tool
-  before using them in production.
-</para>
-<para>
-  Note in particular that the conversion
-  done with <option>--3to4</option> is meant as a starting point for a port
-  from GTK 3 to GTK 4. It is expected that you will have to do manual fixups
-  after the initial conversion.
-</para>
-</refsect1>
-
-<refsect1><title>Simplify Options</title>
-  <para>The <option>simplify</option> command accepts the following options:</para>
-  <variablelist>
-    <varlistentry>
-    <term><option>--replace</option></term>
-      <listitem><para>Write the content back to the .ui file instead of stdout.</para></listitem>
-    </varlistentry>
-    <varlistentry>
-    <term><option>--3to4</option></term>
-      <listitem><para>Transform a GTK 3 ui file to GTK 4</para></listitem>
-    </varlistentry>
-  </variablelist>
-</refsect1>
-
-<refsect1><title>Preview Options</title>
-  <para>The <option>preview</option> command accepts the following options:</para>
-  <variablelist>
-    <varlistentry>
-    <term><option>--id=<arg choice="plain">ID</arg></option></term>
-      <listitem><para>The ID of the object to preview. If not specified,
-                gtk4-builder-tool will choose a suitable object on its own.</para></listitem>
-    </varlistentry>
-    <varlistentry>
-    <term><option>--css=<arg choice="plain">FILE</arg></option></term>
-      <listitem><para>Load style information from the given .css file.</para></listitem>
-    </varlistentry>
-  </variablelist>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-demo-application.xml b/docs/reference/gtk/gtk4-demo-application.xml
deleted file mode 100644
index 4b7b51972d..0000000000
--- a/docs/reference/gtk/gtk4-demo-application.xml
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-demo-application">
-
-<refentryinfo>
-  <title>gtk4-demo-application</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Matthias</firstname>
-      <surname>Clasen</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-demo-application</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-demo-application</refname>
-  <refpurpose>Demonstrate GtkApplication</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-demo-application</command>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-<command>gtk4-demo-application</command> is an example application
-used by <command>gtk4-demo</command>. There is no need to call it
-manually.
-</para>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-demo.xml b/docs/reference/gtk/gtk4-demo.xml
deleted file mode 100644
index 009f82d03c..0000000000
--- a/docs/reference/gtk/gtk4-demo.xml
+++ /dev/null
@@ -1,81 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-demo">
-
-<refentryinfo>
-  <title>gtk4-demo</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Matthias</firstname>
-      <surname>Clasen</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-demo</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-demo</refname>
-  <refpurpose>Demonstrate GTK widgets</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-demo</command>
-<arg choice="opt">--help</arg>
-<arg choice="opt">--version</arg>
-<arg choice="opt">--list</arg>
-<arg choice="opt">--run <replaceable>EXAMPLE</replaceable></arg>
-<arg choice="opt">--autoquit</arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-<command>gtk4-demo</command> is a collection of examples.
-Its purpose is to demonstrate many GTK widgets in a form
-that is useful to application developers.
-</para>
-<para>
-The application shows the source code for each example, as well as
-other used resources, such as ui files and icons.
-</para>
-</refsect1>
-
-<refsect1><title>Options</title>
-  <para>The following options are understood:</para>
-  <variablelist>
-    <varlistentry>
-    <term><option>-h</option>, <option>--help</option></term>
-      <listitem><para>Show help options</para></listitem>
-    </varlistentry>
-    <varlistentry>
-    <term><option>--version</option></term>
-      <listitem><para>Show program version</para></listitem>
-    </varlistentry>
-    <varlistentry>
-    <term><option>--list</option></term>
-      <listitem><para>List available examples.</para></listitem>
-    </varlistentry>
-    <varlistentry>
-    <term><option>-run <replaceable>EXAMPLE</replaceable></option></term>
-      <listitem><para>Run the named example. Use <option>--list</option> to
-        see the available examples.</para></listitem>
-    </varlistentry>
-    <varlistentry>
-    <term><option>--autoquit</option></term>
-      <listitem><para>Quit after a short timeout. This is intended for use
-        with <option>--run</option>, e.g. when profiling.</para></listitem>
-    </varlistentry>
-  </variablelist>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-encode-symbolic-svg.xml b/docs/reference/gtk/gtk4-encode-symbolic-svg.xml
deleted file mode 100644
index 330795bc92..0000000000
--- a/docs/reference/gtk/gtk4-encode-symbolic-svg.xml
+++ /dev/null
@@ -1,74 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-encode-symbolic-svg">
-
-<refentryinfo>
-  <title>gtk4-encode-symbolic-svg</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Alexander</firstname>
-      <surname>Larsson</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-encode-symbolic-svg</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-encode-symbolic-svg</refname>
-  <refpurpose>Symbolic icon conversion utility</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-encode-symbolic-svg</command>
-<arg choice="opt">OPTION...</arg>
-<arg choice="plain"><replaceable>PATH</replaceable></arg>
-<arg choice="plain"><replaceable>WIDTH</replaceable>x<replaceable>HEIGHT</replaceable></arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-  <command>gtk4-encode-symbolic-svg</command> converts symbolic svg icons into
-  specially prepared png files. GTK can load and recolor these pngs, just like
-  original svgs, but loading them is much faster.
-</para>
-<para>
-  <replaceable>PATH</replaceable> is the name of a symbolic svg file,
-  <replaceable>WIDTH</replaceable>x<replaceable>HEIGHT</replaceable> are the
-  desired dimensions for the generated png file.
-</para>
-<para>
-  To distinguish them from ordinary pngs, the generated files have the extension
-  <filename>.symbolic.png</filename>.
-</para>
-</refsect1>
-
-<refsect1><title>Options</title>
-<variablelist>
-  <varlistentry>
-    <term>-o <replaceable>DIRECTORY</replaceable></term>
-    <term>--output <replaceable>DIRECTORY</replaceable></term>
-    <listitem><para>Write png files to <replaceable>DIRECTORY</replaceable>
-         instead of the current working directory.</para></listitem>
-  </varlistentry>
-  <varlistentry>
-    <term>--debug</term>
-    <listitem><para>Generate png files of the various channels during
-         the conversion. If these files are not monochrome green, they
-         are often helpful in pinpointing the problematic parts of
-         the source svg.</para></listitem>
-  </varlistentry>
-</variablelist>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-icon-browser.xml b/docs/reference/gtk/gtk4-icon-browser.xml
deleted file mode 100644
index ee37d55352..0000000000
--- a/docs/reference/gtk/gtk4-icon-browser.xml
+++ /dev/null
@@ -1,55 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-icon-browser">
-
-<refentryinfo>
-  <title>gtk4-icon-browser</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Matthias</firstname>
-      <surname>Clasen</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-icon-browser</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-icon-browser</refname>
-  <refpurpose>List themed icons</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-icon-browser</command>
-<arg choice="opt">--help</arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-<command>gtk4-icon-browser</command> is a utility to explore the icons
-in the current icon theme. It shows icons in various sizes, their symbolic
-variants where available, as well as a description of the icon and its context.
-</para>
-</refsect1>
-
-<refsect1><title>Options</title>
-  <para>The following options are understood:</para>
-  <variablelist>
-    <varlistentry>
-    <term><option>-h</option>, <option>--help</option></term>
-      <listitem><para>Show help options</para></listitem>
-    </varlistentry>
-  </variablelist>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-launch.xml b/docs/reference/gtk/gtk4-launch.xml
deleted file mode 100644
index 8ee32141a0..0000000000
--- a/docs/reference/gtk/gtk4-launch.xml
+++ /dev/null
@@ -1,85 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-launch">
-
-<refentryinfo>
-  <title>gtk4-launch</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Tomáš</firstname>
-      <surname>Bžatek</surname>
-      <email>tbzatek@redhat.com</email>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-launch</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-launch</refname>
-  <refpurpose>Launch an application</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-launch</command>
-<arg choice="opt" rep="repeat">OPTION</arg>
-<arg choice="plain">APPLICATION</arg>
-<arg choice="opt" rep="repeat">URI</arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-<command>gtk4-launch</command> launches an application using the given name.
-The application is started with proper startup notification on a default
-display, unless specified otherwise.
-</para>
-<para>
-<command>gtk4-launch</command> takes at least one argument, the name of
-the application to launch. The name should match application desktop file name,
-as residing in the applications subdirectories of the XDG data directories, with
-or without the '.desktop' suffix.
-</para>
-<para>
-If called with more than one argument, the rest of them besides the application
-name are considered URI locations and are passed as arguments to the launched
-application.
-</para>
-</refsect1>
-
-<refsect1><title>Options</title>
-  <para>The following options are understood:</para>
-  <variablelist>
-    <varlistentry>
-    <term><option>-?</option>, <option>--help</option></term>
-      <listitem><para>Prints a short help text and exits.</para></listitem>
-    </varlistentry>
-  </variablelist>
-  <variablelist>
-    <varlistentry>
-    <term><option>--version</option></term>
-      <listitem><para>Prints the program version and exits.</para></listitem>
-    </varlistentry>
-  </variablelist>
-</refsect1>
-
-<refsect1><title>Environment</title>
-  <para>Some environment variables affect the behavior of <command>gtk4-launch</command>.</para>
-  <variablelist>
-    <varlistentry>
-    <term><option>XDG_DATA_HOME</option>, <option>XDG_DATA_DIRS</option></term>
-      <listitem><para>The environment variables specifying the XDG dta directories.</para></listitem>
-    </varlistentry>
-  </variablelist>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-query-settings.xml b/docs/reference/gtk/gtk4-query-settings.xml
deleted file mode 100644
index 881e88180a..0000000000
--- a/docs/reference/gtk/gtk4-query-settings.xml
+++ /dev/null
@@ -1,45 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-query-settings">
-
-<refentryinfo>
-  <title>gtk4-query-settings</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Timm</firstname>
-      <surname>Bäder</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-query-settings</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-query-settings</refname>
-  <refpurpose>Utility to print name and value of all GtkSettings properties</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-query-settings</command>
-<arg choice="opt"><replaceable>PATTERN</replaceable></arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-  <command>gtk4-query-settings</command> prints both name and value of all properties
-  available in the GtkSettings class. Optionally, you can filter which properties
-  to list by specifying a PATTERN.
-</para>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-update-icon-cache.xml b/docs/reference/gtk/gtk4-update-icon-cache.xml
deleted file mode 100644
index 769853a57b..0000000000
--- a/docs/reference/gtk/gtk4-update-icon-cache.xml
+++ /dev/null
@@ -1,123 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-update-icon-cache">
-
-<refentryinfo>
-  <title>gtk4-update-icon-cache</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Matthias</firstname>
-      <surname>Clasen</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-update-icon-cache</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-update-icon-cache</refname>
-  <refpurpose>Icon theme caching utility</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-update-icon-cache</command>
-<arg choice="opt">--force</arg>
-<arg choice="opt">--ignore-theme-index</arg>
-<group>
-  <arg choice="plain">--index-only</arg>
-  <arg choice="plain">--include-image-data</arg>
-</group>
-<arg choice="opt">--source <arg choice="plain"><replaceable>NAME</replaceable></arg></arg>
-<arg choice="opt">--quiet</arg>
-<arg choice="opt">--validate</arg>
-<arg choice="plain"><replaceable>PATH</replaceable></arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-  <command>gtk4-update-icon-cache</command> creates mmapable cache
-  files for icon themes.
-</para>
-<para>
-  It expects to be given the <replaceable>PATH</replaceable> to an icon theme
-  directory containing an <filename>index.theme</filename>, e.g.
-  <filename>/usr/share/icons/hicolor</filename>, and writes a
-  <filename>icon-theme.cache</filename> containing cached information about
-  the icons in the directory tree below the given directory.
-</para>
-<para>
-  GTK can use the cache files created by <command>gtk4-update-icon-cache</command>
-  to avoid a lot of system call and disk seek overhead when the application
-  starts. Since the format of the cache files allows them to be shared across
-  multiple processes, for instance using the POSIX <command>mmap()</command> system
-  call, the overall memory consumption is reduced as well.
-</para>
-</refsect1>
-
-<refsect1><title>Options</title>
-<variablelist>
-  <varlistentry>
-    <term>--force</term>
-    <term>-f</term>
-    <listitem><para>Overwrite an existing cache file even if it appears to be
-         up-to-date.</para></listitem>
-  </varlistentry>
-
-  <varlistentry>
-    <term>--ignore-theme-index</term>
-    <term>-t</term>
-    <listitem><para>Don't check for the existence of <filename>index.theme</filename>
-     in the icon theme directory. Without this option, <command>gtk4-update-icon-cache</command>
-     refuses to create an icon cache in a directory which does not appear to
-     be the toplevel directory of an icon theme.
-    </para></listitem>
-  </varlistentry>
-
-  <varlistentry>
-    <term>--index-only</term>
-    <term>-i</term>
-    <listitem><para>Don't include image data in the cache.
-    </para></listitem>
-  </varlistentry>
-
-  <varlistentry>
-    <term>--include-image-data</term>
-    <listitem><para>Include image data in the cache.
-    </para></listitem>
-  </varlistentry>
-
-  <varlistentry>
-    <term>--source</term>
-    <term>-c</term>
-    <listitem><para>Output a C header file declaring a constant
-     <replaceable>NAME</replaceable> with the contents of the icon
-     cache.</para></listitem>
-  </varlistentry>
-
-  <varlistentry>
-    <term>--quiet</term>
-    <term>-q</term>
-    <listitem><para>Turn off verbose output.
-    </para></listitem>
-  </varlistentry>
-
-  <varlistentry>
-    <term>--validate</term>
-    <term>-v</term>
-    <listitem><para>Validate existing icon cache.
-    </para></listitem>
-  </varlistentry>
-</variablelist>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/gtk4-widget-factory.xml b/docs/reference/gtk/gtk4-widget-factory.xml
deleted file mode 100644
index 6233fe65df..0000000000
--- a/docs/reference/gtk/gtk4-widget-factory.xml
+++ /dev/null
@@ -1,63 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-]>
-<refentry id="gtk4-widget-factory">
-
-<refentryinfo>
-  <title>gtk4-widget-factory</title>
-  <productname>GTK</productname>
-  <authorgroup>
-    <author>
-      <contrib>Developer</contrib>
-      <firstname>Matthias</firstname>
-      <surname>Clasen</surname>
-    </author>
-  </authorgroup>
-</refentryinfo>
-
-<refmeta>
-  <refentrytitle>gtk4-widget-factory</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="manual">User Commands</refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>gtk4-widget-factory</refname>
-  <refpurpose>Demonstrate GTK widgets</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<cmdsynopsis>
-<command>gtk4-widget-factory</command>
-<arg choice="opt">--help</arg>
-</cmdsynopsis>
-</refsynopsisdiv>
-
-<refsect1><title>Description</title>
-<para>
-<command>gtk4-widget-factory</command> is a collection of examples.
-Its purpose is to demonstrate many GTK widgets in a form
-that is useful to GTK theme developers.
-</para>
-<para>
-The application shows widgets in different, typical combinations
-and states.
-</para>
-</refsect1>
-
-<refsect1><title>Options</title>
-  <para>The following options are understood:</para>
-  <variablelist>
-    <varlistentry>
-    <term><option>-h</option>, <option>--help</option></term>
-      <listitem><para>Show help options</para></listitem>
-    </varlistentry>
-    <varlistentry>
-    <term><option>--version</option></term>
-      <listitem><para>Show program version</para></listitem>
-    </varlistentry>
-  </variablelist>
-</refsect1>
-
-</refentry>
diff --git a/docs/reference/gtk/overview.xml b/docs/reference/gtk/overview.xml
deleted file mode 100644
index 0435836586..0000000000
--- a/docs/reference/gtk/overview.xml
+++ /dev/null
@@ -1,101 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE partintro PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
-               ]>
-<partintro>
-<para>
-GTK is a library for creating graphical user interfaces. It
-works on many UNIX-like platforms, Windows, and OS X.
-GTK is released under the GNU Library General Public License
-(GNU LGPL), which allows for flexible licensing of client
-applications. GTK has a C-based object-oriented architecture that
-allows for maximum flexibility.  Bindings for many other languages have
-been written, including C++, Objective-C, Guile/Scheme, Perl, Python,
-TOM, Ada95, Free Pascal, and Eiffel.  The GTK library itself contains
-<firstterm>widgets</firstterm>, that is, GUI components such as GtkButton
-or GtkTextView.
-
-</para>
-<para>
-GTK depends on the following libraries:
-<variablelist>
-
-<varlistentry>
-<term>GLib</term>
-<listitem><para>
-A general-purpose utility library, not specific to graphical user interfaces.
-GLib provides many useful data types, macros, type conversions,
-string utilities, file utilities, a main loop abstraction, and so on.
-</para></listitem>
-</varlistentry>
-
-<varlistentry>
-<term>GObject</term>
-<listitem><para>A library that provides a type system, a collection of
-fundamental types including an object type, a signal system.
-</para></listitem>
-</varlistentry>
-
-<varlistentry>
-<term>GIO</term>
-<listitem><para>A modern, easy-to-use VFS API including abstractions for
-files, drives, volumes, stream IO, as well as network programming and
-DBus communication.
-</para></listitem>
-</varlistentry>
-
-<varlistentry>
-<term>cairo</term>
-<listitem><para>Cairo is a 2D graphics library with support for multiple
-output devices.
-</para></listitem>
-</varlistentry>
-
-<varlistentry>
-<term>Pango</term>
-<listitem><para>
-Pango is a library for internationalized text handling. It centers
-around the PangoLayout object, representing a paragraph of text.
-Pango provides the engine for GtkTextView, GtkLabel, GtkEntry, and
-other widgets that display text.
-</para></listitem>
-</varlistentry>
-
-<varlistentry>
-<term>GdkPixbuf</term>
-<listitem><para>
-This is a small library which allows you to create GdkPixbuf
-("pixel buffer") objects from image data or image files.
-Use a GdkPixbuf in combination with GtkImage to display images.
-</para></listitem>
-</varlistentry>
-
-<varlistentry>
-<term>graphene</term>
-<listitem><para>
-This is a small library which provides vector and matrix datatypes
-and operations. graphene provides optimized implementations using
-various SIMD instruction sets such as SSE.
-</para></listitem>
-</varlistentry>
-
-<varlistentry>
-<term>GDK</term>
-<listitem><para>
-GDK is the abstraction layer that allows GTK to support multiple
-windowing systems. GDK provides window system facilities on Wayland,
-X11, Windows, and OS X.
-</para></listitem>
-</varlistentry>
-
-<varlistentry>
-<term>GSK</term>
-<listitem><para>
-GSK is a library for creating a scene graph from render nodes,
-and rendering it using different rendering APIs. GSK provides renderers
-for OpenGL, Vulkan and cairo.
-</para></listitem>
-</varlistentry>
-</variablelist>
-</para>
-</partintro>