diff --git a/reference/datetime/dateperiod.xml b/reference/datetime/dateperiod.xml
index 7c82963f53..a30f2164ce 100644
--- a/reference/datetime/dateperiod.xml
+++ b/reference/datetime/dateperiod.xml
@@ -64,19 +64,15 @@
 <!-- {{{ DatePeriod constants -->
   <section xml:id="dateperiod.constants">
    &reftitle.constants;
-   <section xml:id="dateperiod.constants.types">
-    <title>DatePeriod Node Types</title>
-    <variablelist>
+   <variablelist>
+    <varlistentry xml:id="dateperiod.constants.exclude-start-date">
+     <term><constant>DatePeriod::EXCLUDE_START_DATE</constant></term>
+     <listitem>
+      <para>Exclude start date, used in <function>DatePeriod::__construct</function>.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="dateperiod.constants.exclude-start-date">
-      <term><constant>DatePeriod::EXCLUDE_START_DATE</constant></term>
-      <listitem>
-       <para>Exclude start date, used in <function>DatePeriod::__construct</function>.</para>
-      </listitem>
-     </varlistentry>
-
-    </variablelist>
-   </section>
+   </variablelist>
   </section>
 <!-- }}} -->
 
diff --git a/reference/datetime/datetime.xml b/reference/datetime/datetime.xml
index 6e235c7b4b..971ba7223c 100644
--- a/reference/datetime/datetime.xml
+++ b/reference/datetime/datetime.xml
@@ -118,124 +118,120 @@
   </section>
   
 <!-- {{{ DateTime constants -->
-  <section>
+  <section xml:id="datetime.constants.types">
    &reftitle.constants;
-   <section xml:id="datetime.constants.types">
-    <title>DateTime Node Types</title>
-    <variablelist>
+   <variablelist>
+    <varlistentry xml:id="datetime.constants.atom">
+     <term><constant>DateTime::ATOM</constant></term>
+     <term><constant>DATE_ATOM</constant></term>
+     <listitem>
+      <simpara>
+       Atom (example: 2005-08-15T15:52:01+00:00)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.atom">
-      <term><constant>DateTime::ATOM</constant></term>
-      <term><constant>DATE_ATOM</constant></term>
-      <listitem>
-       <simpara>
-        Atom (example: 2005-08-15T15:52:01+00:00)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.cookie">
+     <term><constant>DateTime::COOKIE</constant></term>
+     <term><constant>DATE_COOKIE</constant></term>
+     <listitem>
+      <simpara>
+       HTTP Cookies (example: Monday, 15-Aug-05 15:52:01 UTC)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.cookie">
-      <term><constant>DateTime::COOKIE</constant></term>
-      <term><constant>DATE_COOKIE</constant></term>
-      <listitem>
-       <simpara>
-        HTTP Cookies (example: Monday, 15-Aug-05 15:52:01 UTC)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.iso8601">
+     <term><constant>DateTime::ISO8601</constant></term>
+     <term><constant>DATE_ISO8601</constant></term>
+     <listitem>
+      <simpara>
+       ISO-8601 (example: 2005-08-15T15:52:01+0000)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.iso8601">
-      <term><constant>DateTime::ISO8601</constant></term>
-      <term><constant>DATE_ISO8601</constant></term>
-      <listitem>
-       <simpara>
-        ISO-8601 (example: 2005-08-15T15:52:01+0000)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.rfc822">
+     <term><constant>DateTime::RFC822</constant></term>
+     <term><constant>DATE_RFC822</constant></term>
+     <listitem>
+      <simpara>
+       RFC 822 (example: Mon, 15 Aug 05 15:52:01 +0000)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.rfc822">
-      <term><constant>DateTime::RFC822</constant></term>
-      <term><constant>DATE_RFC822</constant></term>
-      <listitem>
-       <simpara>
-        RFC 822 (example: Mon, 15 Aug 05 15:52:01 +0000)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.rfc850">
+     <term><constant>DateTime::RFC850</constant></term>
+     <term><constant>DATE_RFC850</constant></term>
+     <listitem>
+      <simpara>
+       RFC 850 (example: Monday, 15-Aug-05 15:52:01 UTC)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.rfc850">
-      <term><constant>DateTime::RFC850</constant></term>
-      <term><constant>DATE_RFC850</constant></term>
-      <listitem>
-       <simpara>
-        RFC 850 (example: Monday, 15-Aug-05 15:52:01 UTC)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.rfc1036">
+     <term><constant>DateTime::RFC1036</constant></term>
+     <term><constant>DATE_RFC1036</constant></term>
+     <listitem>
+      <simpara>
+       RFC 1036 (example: Mon, 15 Aug 05 15:52:01 +0000)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.rfc1036">
-      <term><constant>DateTime::RFC1036</constant></term>
-      <term><constant>DATE_RFC1036</constant></term>
-      <listitem>
-       <simpara>
-        RFC 1036 (example: Mon, 15 Aug 05 15:52:01 +0000)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.rfc1123">
+     <term><constant>DateTime::RFC1123</constant></term>
+     <term><constant>DATE_RFC1123</constant></term>
+     <listitem>
+      <simpara>
+       RFC 1123 (example: Mon, 15 Aug 2005 15:52:01 +0000)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.rfc1123">
-      <term><constant>DateTime::RFC1123</constant></term>
-      <term><constant>DATE_RFC1123</constant></term>
-      <listitem>
-       <simpara>
-        RFC 1123 (example: Mon, 15 Aug 2005 15:52:01 +0000)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.rfc2822">
+     <term><constant>DateTime::RFC2822</constant></term>
+     <term><constant>DATE_RFC2822</constant></term>
+     <listitem>
+      <simpara>
+       RFC 2822 (Mon, 15 Aug 2005 15:52:01 +0000)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.rfc2822">
-      <term><constant>DateTime::RFC2822</constant></term>
-      <term><constant>DATE_RFC2822</constant></term>
-      <listitem>
-       <simpara>
-        RFC 2822 (Mon, 15 Aug 2005 15:52:01 +0000)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.rfc3339">
+     <term><constant>DateTime::RFC3339</constant></term>
+     <term><constant>DATE_RFC3339</constant></term>
+     <listitem>
+      <simpara>
+       Same as <constant>DATE_ATOM</constant> (since PHP 5.1.3)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.rfc3339">
-      <term><constant>DateTime::RFC3339</constant></term>
-      <term><constant>DATE_RFC3339</constant></term>
-      <listitem>
-       <simpara>
-        Same as <constant>DATE_ATOM</constant> (since PHP 5.1.3)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.rss">
+     <term><constant>DateTime::RSS</constant></term>
+     <term><constant>DATE_RSS</constant></term>
+     <listitem>
+      <simpara>
+       RSS (Mon, 15 Aug 2005 15:52:01 +0000)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.rss">
-      <term><constant>DateTime::RSS</constant></term>
-      <term><constant>DATE_RSS</constant></term>
-      <listitem>
-       <simpara>
-        RSS (Mon, 15 Aug 2005 15:52:01 +0000)
-       </simpara>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetime.constants.w3c">
+     <term><constant>DateTime::W3C</constant></term>
+     <term><constant>DATE_W3C</constant></term>
+     <listitem>
+      <simpara>
+       World Wide Web Consortium (example: 2005-08-15T15:52:01+00:00)
+      </simpara>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetime.constants.w3c">
-      <term><constant>DateTime::W3C</constant></term>
-      <term><constant>DATE_W3C</constant></term>
-      <listitem>
-       <simpara>
-        World Wide Web Consortium (example: 2005-08-15T15:52:01+00:00)
-       </simpara>
-      </listitem>
-     </varlistentry>
-
-    </variablelist>
-   </section>
+   </variablelist>
   </section>
 <!-- }}} -->
 
diff --git a/reference/datetime/datetimezone.xml b/reference/datetime/datetimezone.xml
index 037cc35263..ee4160f488 100644
--- a/reference/datetime/datetimezone.xml
+++ b/reference/datetime/datetimezone.xml
@@ -138,110 +138,106 @@
 <!-- {{{ DateTimeZone constants -->
   <section xml:id="datetimezone.constants">
    &reftitle.constants;
-   <section xml:id="datetimezone.constants.types">
-    <title>DateTimeZone Node Types</title>
-    <variablelist>
+   <variablelist>
+    <varlistentry xml:id="datetimezone.constants.africa">
+     <term><constant>DateTimeZone::AFRICA</constant></term>
+     <listitem>
+      <para>Africa time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.africa">
-      <term><constant>DateTimeZone::AFRICA</constant></term>
-      <listitem>
-       <para>Africa time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.america">
+     <term><constant>DateTimeZone::AMERICA</constant></term>
+     <listitem>
+      <para>America time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.america">
-      <term><constant>DateTimeZone::AMERICA</constant></term>
-      <listitem>
-       <para>America time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.antarctica">
+     <term><constant>DateTimeZone::ANTARCTICA</constant></term>
+     <listitem>
+      <para>Antarctica time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.antarctica">
-      <term><constant>DateTimeZone::ANTARCTICA</constant></term>
-      <listitem>
-       <para>Antarctica time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.arctic">
+     <term><constant>DateTimeZone::ARCTIC</constant></term>
+     <listitem>
+      <para>Arctic time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.arctic">
-      <term><constant>DateTimeZone::ARCTIC</constant></term>
-      <listitem>
-       <para>Arctic time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.asia">
+     <term><constant>DateTimeZone::ASIA</constant></term>
+     <listitem>
+      <para>Asia time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.asia">
-      <term><constant>DateTimeZone::ASIA</constant></term>
-      <listitem>
-       <para>Asia time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.atlantic">
+     <term><constant>DateTimeZone::ATLANTIC</constant></term>
+     <listitem>
+      <para>Atlantic time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.atlantic">
-      <term><constant>DateTimeZone::ATLANTIC</constant></term>
-      <listitem>
-       <para>Atlantic time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.australia">
+     <term><constant>DateTimeZone::AUSTRALIA</constant></term>
+     <listitem>
+      <para>Australia time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.australia">
-      <term><constant>DateTimeZone::AUSTRALIA</constant></term>
-      <listitem>
-       <para>Australia time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.europe">
+     <term><constant>DateTimeZone::EUROPE</constant></term>
+     <listitem>
+      <para>Europe time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.europe">
-      <term><constant>DateTimeZone::EUROPE</constant></term>
-      <listitem>
-       <para>Europe time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.indian">
+     <term><constant>DateTimeZone::INDIAN</constant></term>
+     <listitem>
+      <para>Indian time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.indian">
-      <term><constant>DateTimeZone::INDIAN</constant></term>
-      <listitem>
-       <para>Indian time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.pacific">
+     <term><constant>DateTimeZone::PACIFIC</constant></term>
+     <listitem>
+      <para>Pacific time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.pacific">
-      <term><constant>DateTimeZone::PACIFIC</constant></term>
-      <listitem>
-       <para>Pacific time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.utc">
+     <term><constant>DateTimeZone::UTC</constant></term>
+     <listitem>
+      <para>UTC time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.utc">
-      <term><constant>DateTimeZone::UTC</constant></term>
-      <listitem>
-       <para>UTC time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.all">
+     <term><constant>DateTimeZone::ALL</constant></term>
+     <listitem>
+      <para>All time zones.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.all">
-      <term><constant>DateTimeZone::ALL</constant></term>
-      <listitem>
-       <para>All time zones.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.all-with-bc">
+     <term><constant>DateTimeZone::ALL_WITH_BC</constant></term>
+     <listitem>
+      <para>All time zones including backwards compatible.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.all-with-bc">
-      <term><constant>DateTimeZone::ALL_WITH_BC</constant></term>
-      <listitem>
-       <para>All time zones including backwards compatible.</para>
-      </listitem>
-     </varlistentry>
+    <varlistentry xml:id="datetimezone.constants.per-country">
+     <term><constant>DateTimeZone::PER_COUNTRY</constant></term>
+     <listitem>
+      <para>Time zones per country.</para>
+     </listitem>
+    </varlistentry>
 
-     <varlistentry xml:id="datetimezone.constants.per-country">
-      <term><constant>DateTimeZone::PER_COUNTRY</constant></term>
-      <listitem>
-       <para>Time zones per country.</para>
-      </listitem>
-     </varlistentry>
-
-    </variablelist>
-   </section>
+   </variablelist>
   </section>
 <!-- }}} -->