Minor editorializing.

diff --git a/doc/src/sgml/ref/set_transaction.sgml b/doc/src/sgml/ref/set_transaction.sgml
index 50a8908825078e6e2c326794a6e13a32b51c247a..d57792ee3dd17694ec2e4bcfa6aa5cc4e8b9f11b 100644 (file)
--- a/doc/src/sgml/ref/set_transaction.sgml
+++ b/doc/src/sgml/ref/set_transaction.sgml
@@ -1,4 +1,4 @@
-
+
 
  
   SET TRANSACTION
@@ -34,9 +34,9 @@ where transaction_mode is one of:
    characteristics of the current transaction. It has no effect on any
    subsequent transactions.  SET SESSION
    CHARACTERISTICS sets the default transaction
-   characteristics for subsequent transactions of a session.  SET
-   TRANSACTION can override it for an individual
-   transaction.
+   characteristics for subsequent transactions of a session.  These
+   defaults can be overridden by SET TRANSACTION for an
+   individual transaction.
   
 
   
@@ -68,14 +68,6 @@ where transaction_mode is one of:
        before the first query or data-modification statement was executed in
        this transaction.
       
-      
-       
-        Intuitively, serializable means that two concurrent
-        transactions will leave the database in the same state as if
-        the two had been executed strictly one after the other (in one
-        order or the other).
-       
-      
      
     
    
@@ -111,7 +103,7 @@ where transaction_mode is one of:
    TRUNCATE; and EXPLAIN ANALYZE
    and EXECUTE if the command they would execute is
    among those listed.  This is a high-level notion of read-only that
-   does not prevent writes to disk.
+   does not prevent all writes to disk.
   
  
 
@@ -138,8 +130,9 @@ where transaction_mode is one of:
    and .
    (In fact SET SESSION CHARACTERISTICS is just a
    verbose equivalent for setting these variables with SET.)
-   This allows them to be set in the configuration file.  Consult 
-   linkend="runtime-config"> for more information.
+   This means the defaults can be set in the configuration file, via
+   ALTER DATABASE, etc.  Consult 
+   for more information.
   
  
 
@@ -149,10 +142,10 @@ where transaction_mode is one of:
   
    Both commands are defined in the SQL standard.
    SERIALIZABLE is the default transaction
-   isolation level in the standard; in
+   isolation level in the standard.  In
    PostgreSQL the default is ordinarily
    READ COMMITTED, but you can change it as
-   mentioned above.  Because of multiversion concurrency control, the
+   mentioned above.  Because of lack of predicate locking, the
    SERIALIZABLE level is not truly
    serializable. See  for details.