diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index fc51ba5e04..32c9fcf33f 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -4221,15 +4221,30 @@ PORTVERSION=   1.0</programlisting>
 	      <filename><makevar>PREFIX</makevar>/share/<makevar>PORTNAME</makevar></filename>.</para>
 	  </listitem>
 
+	  <listitem>
+	    <para><makevar>DATADIR_REL</makevar> gets expanded to
+	      <filename>share/<makevar>PORTNAME</makevar></filename>.</para>
+	  </listitem>
+
 	  <listitem>
 	    <para><makevar>DOCSDIR</makevar> gets expanded to
 	      <filename><makevar>PREFIX</makevar>/share/doc/<makevar>PORTNAME</makevar></filename>.</para>
 	  </listitem>
 
+	  <listitem>
+	    <para><makevar>DOCSDIR_REL</makevar> gets expanded to
+	      <filename>share/doc/<makevar>PORTNAME</makevar></filename>.</para>
+	  </listitem>
+
 	  <listitem>
 	    <para><makevar>EXAMPLESDIR</makevar> gets expanded to
 	      <filename><makevar>PREFIX</makevar>/share/examples/<makevar>PORTNAME</makevar></filename>.</para>
 	  </listitem>
+
+	  <listitem>
+	    <para><makevar>EXAMPLESDIR_REL</makevar> gets expanded to
+	      <filename>share/examples/<makevar>PORTNAME</makevar></filename>.</para>
+	  </listitem>
 	</itemizedlist>
 
 	<note>
@@ -4250,7 +4265,7 @@ PORTVERSION=   1.0</programlisting>
 	  (See more on <filename>pkg-plist</filename> substitution
 	  <link linkend="plist-sub">here</link>.)</para>
 
-	<para>All documentation files and directories installed should
+	<para>All conditionally installed documentation files and directories should
 	  be included in <filename>pkg-plist</filename> with the
 	  <literal>%%PORTDOCS%%</literal> prefix, for example:</para>
 
@@ -6424,7 +6439,10 @@ LIB_DEPENDS+=	QtCore:${PORTSDIR}/devel/qt4-corelib
 	  <filename><makevar>PREFIX</makevar>/www/<replaceable>appname</replaceable></filename>.
 	  For your convenience, this path is available both in
 	  <filename>Makefile</filename> and in <filename>pkg-plist</filename>
-	  as <makevar>WWWDIR</makevar>.</para>
+	  as <makevar>WWWDIR</makevar>, and the path relative to
+	  <makevar>PREFIX</makevar> is available in
+	  <filename>Makefile</filename> as
+	  <makevar>WWWDIR_REL</makevar>.</para>
 
 	<para>The user and group of web server process are available as
 	  <makevar>WWWOWN</makevar> and <makevar>WWWGRP</makevar>, in case you