<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <link rel="STYLESHEET" href="zodb.css" type='text/css'> <link rel="first" href="zodb.html" title='ZODB/ZEO Programming Guide'> <link rel="contents" href="contents.html" title="Contents"><link rel='last' href='about.html' title='About this document...'> <link rel='help' href='about.html' title='About this document...'> <LINK REL="next" HREF="node34.html"> <LINK REL="previous" href="zeo.html"> <LINK REL="up" HREF="zodb.html"> <LINK REL="next" HREF="node30.html"> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name='aesop' content='information'> <META NAME="description" CONTENT="4 Transactions and Versioning"> <META NAME="keywords" CONTENT="zodb"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <title>4 Transactions and Versioning</title> </head> <body> <DIV CLASS="navigation"> <table align="center" width="100%" cellpadding="0" cellspacing="2"> <tr> <td><A HREF="node28.html"><img src='icons/previous.gif' border='0' height='32' alt='Previous Page' width='32'></A></td> <td><A HREF="zodb.html"><img src='icons/up.gif' border='0' height='32' alt='Up One Level' width='32'></A></td> <td><A HREF="node30.html"><img src='icons/next.gif' border='0' height='32' alt='Next Page' width='32'></A></td> <td align="center" width="100%">ZODB/ZEO Programming Guide</td> <td><A href="contents.html"><img src='icons/contents.gif' border='0' height='32' alt='Contents' width='32'></A></td> <td><img src='icons/blank.gif' border='0' height='32' alt='' width='32'></td> <td><img src='icons/blank.gif' border='0' height='32' alt='' width='32'></td> </tr></table> <b class="navlabel">Previous:</b> <a class="sectref" HREF="node28.html">3.5 Sample Application: chatter.py</A> <b class="navlabel">Up:</b> <a class="sectref" HREF="zodb.html">ZODB/ZEO Programming Guide</A> <b class="navlabel">Next:</b> <a class="sectref" HREF="node30.html">4.1 Subtransactions</A> <br><hr> </DIV> <!--End of Navigation Panel--> <H1><A NAME="SECTION000500000000000000000"> 4 Transactions and Versioning</A> </H1> <P> <p><hr> <!--Table of Child-Links--> <A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></a> <UL CLASS="ChildLinks"> <LI><A href="node30.html">4.1 Subtransactions</a> <LI><A href="node31.html">4.2 Undoing Changes</a> <LI><A href="node32.html">4.3 Versions</a> <LI><A href="node33.html">4.4 Multithreaded ZODB Programs</a> </ul> <!--End of Table of Child-Links--> <DIV CLASS="navigation"> <p><hr> <table align="center" width="100%" cellpadding="0" cellspacing="2"> <tr> <td><A HREF="node28.html"><img src='icons/previous.gif' border='0' height='32' alt='Previous Page' width='32'></A></td> <td><A HREF="zodb.html"><img src='icons/up.gif' border='0' height='32' alt='Up One Level' width='32'></A></td> <td><A HREF="node30.html"><img src='icons/next.gif' border='0' height='32' alt='Next Page' width='32'></A></td> <td align="center" width="100%">ZODB/ZEO Programming Guide</td> <td><A href="contents.html"><img src='icons/contents.gif' border='0' height='32' alt='Contents' width='32'></A></td> <td><img src='icons/blank.gif' border='0' height='32' alt='' width='32'></td> <td><img src='icons/blank.gif' border='0' height='32' alt='' width='32'></td> </tr></table> <b class="navlabel">Previous:</b> <a class="sectref" HREF="node28.html">3.5 Sample Application: chatter.py</A> <b class="navlabel">Up:</b> <a class="sectref" HREF="zodb.html">ZODB/ZEO Programming Guide</A> <b class="navlabel">Next:</b> <a class="sectref" HREF="node30.html">4.1 Subtransactions</A> <hr> <span class="release-info">Release 0.04, documentation updated on 17 January 2003.</span> </DIV> <!--End of Navigation Panel--> </BODY> </HTML>