<quote>trusted</quote>.  Trusted extensions can be run by any
  user who has <literal>CREATE</literal> privilege on the current
  database.  Extensions that are trusted are identified as such in the
  sections that follow.  Generally, trusted extensions are ones that cannot
  provide access to outside-the-database functionality.
 </para>

 <para id="contrib-trusted-extensions">
  The following extensions are trusted in a default installation:

  <simplelist type="vert" columns="4">
   <member><xref linkend="btree-gin"/></member>
   <member><xref linkend="btree-gist"/></member>
   <member><xref linkend="citext"/></member>
   <member><xref linkend="cube"/></member>
   <member><xref linkend="dict-int"/></member>
   <member><xref linkend="fuzzystrmatch"/></member>
   <member><xref linkend="hstore"/></member>
   <member><xref linkend="intarray"/></member>
   <member><xref linkend="isn"/></member>
   <member><xref linkend="lo"/></member>
   <member><xref linkend="ltree"/></member>
   <member><xref linkend="pgcrypto"/></member>
   <member><xref linkend="pgtrgm"/></member>
   <member><xref linkend="seg"/></member>
   <member><xref linkend="tablefunc"/></member>
   <member><xref linkend="tcn"/></member>
   <member><xref linkend="tsm-system-rows"/></member>
   <member><xref linkend="tsm-system-time"/></member>
   <member><xref linkend="unaccent"/></member>
   <member><xref linkend="uuid-ossp"/></member>
  </simplelist>
 </para>

 <para>
  Many extensions allow you to install their objects in a schema of your
  choice.  To do that, add <literal>SCHEMA
  <replaceable>schema_name</replaceable></literal> to the <command>CREATE EXTENSION</command>
  command.  By default, the objects will be placed in your current creation
  target schema, which in turn defaults to <literal>public</literal>.
 </para>

 <para>
  Note, however, that some of these components are not <quote>extensions</quote>
  in this sense, but are loaded into the server in some other way, for instance
  by way of
  <xref linkend="guc-shared-preload-libraries"/>.  See the documentation of each
  component for details.
 </para>

 &amcheck;
 &auth-delay;
 &auto-explain;
 &basebackup-to-shell;
 &basic-archive;
 &bloom;
 &btree-gin;
 &btree-gist;
 &citext;
 &cube;
 &dblink;
 &dict-int;
 &dict-xsyn;
 &earthdistance;
 &file-fdw;
 &fuzzystrmatch;
 &hstore;
 &intagg;
 &intarray;
 &isn;
 &lo;
 &ltree;
 &pageinspect;
 &passwordcheck;