Fix documentation to specify the correct range of timezone offsets for

type time with time zone, ie, +/- 13:59 not +/- 12:00.  Also some minor
wording improvements.

doc/src/sgml/datatype.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.162 2005/10/15 01:47:11 neilc Exp $
+$PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.163 2005/10/22 19:33:57 tgl Exp $
 -->
 
  <chapter id="datatype">
@@ -1367,7 +1367,7 @@ SELECT b, char_length(b) FROM test2;
         <entry><type>time [ (<replaceable>p</replaceable>) ] [ without time zone ]</type></entry>
         <entry>8 bytes</entry>
         <entry>times of day only</entry>
-        <entry>00:00:00.00</entry>
+        <entry>00:00:00</entry>
         <entry>24:00:00</entry>
         <entry>1 microsecond / 14 digits</entry>
        </row>
@@ -1375,8 +1375,8 @@ SELECT b, char_length(b) FROM test2;
         <entry><type>time [ (<replaceable>p</replaceable>) ] with time zone</type></entry>
         <entry>12 bytes</entry>
         <entry>times of day only, with time zone</entry>
-        <entry>00:00:00.00+12</entry>
-        <entry>24:00:00-12</entry>
+        <entry>00:00:00+1359</entry>
+        <entry>24:00:00-1359</entry>
         <entry>1 microsecond / 14 digits</entry>
        </row>
       </tbody>
@@ -1759,19 +1759,22 @@ January 8 04:05:06 1999 PST
 
      <para>
       The <acronym>SQL</acronym> standard differentiates <type>timestamp without time zone</type> 
-      and <type>timestamp with time zone</type> literals by the existence of a 
-      <quote>+</quote>; or <quote>-</quote>. Hence, according to the standard, 
+      and <type>timestamp with time zone</type> literals by the presence of a 
+      <quote>+</quote> or <quote>-</quote>. Hence, according to the standard, 
       <programlisting>TIMESTAMP '2004-10-19 10:23:54'</programlisting>
       is a <type>timestamp without time zone</type>, while
       <programlisting>TIMESTAMP '2004-10-19 10:23:54+02'</programlisting>
       is a <type>timestamp with time zone</type>.
-      <productname>PostgreSQL</productname> 
-      differs from the standard by requiring that <type>timestamp with time zone</type> 
-      literals be explicitly typed:
+      <productname>PostgreSQL</productname> never examines the content of a
+      literal string before determining its type, and therefore will treat
+      both of the above as <type>timestamp without time zone</type>.  To
+      ensure that a literal is treated as <type>timestamp with time
+      zone</type>, give it the correct explicit type:
       <programlisting>TIMESTAMP WITH TIME ZONE '2004-10-19 10:23:54+02'</programlisting>
-      If a literal is not explicitly indicated as being of <type>timestamp with time zone</type>,
-      <productname>PostgreSQL</productname> will silently ignore any time zone indication in the literal.
-      That is, the resulting date/time value is derived from the date/time
+      In a literal that has been decided to be <type>timestamp without time
+      zone</type>, <productname>PostgreSQL</productname> will silently ignore
+      any time zone indication.
+      That is, the resulting value is derived from the date/time
       fields in the input value, and is not adjusted for time zone.
      </para>