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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/notation.sgml,v 1.20 2002/10/24 17:48:54 petere Exp $
-->
<sect1 id="notation">
<title>Terminology and Notation</title>
<para>
An <firstterm>administrator</firstterm> is generally a person who is
in charge of installing and running the server. A <firstterm>user</firstterm>
could be anyone who is using, or wants to use, any part of the
<productname>PostgreSQL</productname> system. These terms should not
be interpreted too narrowly; this documentation set does not have fixed
presumptions about system administration procedures.
</para>
<para>
We use <filename>/usr/local/pgsql/</filename> as the root
directory of the installation and <filename>/usr/local/pgsql/data</filename>
as the directory with the database files. These directories may vary
on your site, details can be derived in the <citetitle>Administrator's Guide</citetitle>.
</para>
<para>
In a command synopsis, brackets
(<literal>[</literal> and <literal>]</literal>) indicate an optional phrase or keyword.
Anything in braces
(<literal>{</literal> and <literal>}</literal>) and containing vertical bars
(<literal>|</literal>)
indicates that you must choose one alternative.
</para>
<para>
Examples will show commands executed from various accounts and programs.
Commands executed from a Unix shell may be preceded with a dollar sign
(<quote><literal>$</literal></quote>). Commands executed from particular user
accounts such as <systemitem>root</> or <systemitem>postgres</> are specially flagged and explained.
<acronym>SQL</acronym> commands may be preceded with
<quote><literal>=></literal></quote>
or will have no leading prompt, depending on the context.
</para>
<note>
<para>
The notation for
flagging commands is not universally consistent throughout the
documentation set.
Please report problems to the documentation mailing list
<email>pgsql-docs@postgresql.org</email>.
</para>
</note>
</sect1>
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