*** a/doc/src/sgml/sources.sgml
--- b/doc/src/sgml/sources.sgml
***************
*** 143,148 **** ereport(ERROR,
--- 143,155 ----
     </para>
  
     <para>
+     If the severity level is <literal>ERROR</> or higher,
+     <function>ereport</> aborts the execution of the user-defined
+     function and does not return to the caller. If the severity level is
+     lower than <literal>ERROR</>, <function>ereport</> returns normally.
+    </para>
+     
+    <para>
      The available auxiliary routines for <function>ereport</> are:
    <itemizedlist>
     <listitem>