diff --git a/doc/src/sgml/advanced.sgml b/doc/src/sgml/advanced.sgml
new file mode 100644
index f6c4627..27b6d47
*** a/doc/src/sgml/advanced.sgml
--- b/doc/src/sgml/advanced.sgml
*************** CREATE TABLE capitals (
*** 628,635 ****
      <firstterm>parent</firstterm>, <classname>cities</classname>.  The
      type of the column <structfield>name</structfield> is
      <type>text</type>, a native <productname>PostgreSQL</productname>
!     type for variable length character strings.  State capitals have
!     an extra column, <structfield>state</structfield>, that shows their state.  In
      <productname>PostgreSQL</productname>, a table can inherit from
      zero or more other tables.
     </para>
--- 628,636 ----
      <firstterm>parent</firstterm>, <classname>cities</classname>.  The
      type of the column <structfield>name</structfield> is
      <type>text</type>, a native <productname>PostgreSQL</productname>
!     type for variable length character strings.  The
!     <classname>capitals</classname> table has
!     an extra column, <structfield>state</structfield>, which shows their states.  In
      <productname>PostgreSQL</productname>, a table can inherit from
      zero or more other tables.
     </para>