diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
new file mode 100644
index e3e254b..4e233b0
*** a/doc/src/sgml/runtime.sgml
--- b/doc/src/sgml/runtime.sgml
***************
*** 1,4 ****
! <!-- doc/src/sgml/runtime.sgml -->
  
  <chapter id="runtime">
   <title>Server Setup and Operation</title>
--- 1,4 ----
! `<!-- doc/src/sgml/runtime.sgml -->
  
  <chapter id="runtime">
   <title>Server Setup and Operation</title>
*************** postgres$ <userinput>initdb -D /usr/loca
*** 188,195 ****
     operating system's collation library for character set ordering.
     This controls the ordering of keys stored in indexes.  For this reason,
     a cluster cannot switch to an incompatible collation library version,
!    either through snapshot restore, binary streaming replication, or
!    <application>pg_upgrade</> run.
    </para>
  
    <sect2 id="creating-cluster-mount-points">
--- 188,195 ----
     operating system's collation library for character set ordering.
     This controls the ordering of keys stored in indexes.  For this reason,
     a cluster cannot switch to an incompatible collation library version,
!    either through snapshot restore, binary streaming replication, a
!    different operating system, or an operating system upgrade.
    </para>
  
    <sect2 id="creating-cluster-mount-points">