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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <title>About Page Processing</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1" /> <meta name="date" content="2009-04-14T16:11:26Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="About Page Processing" /> <meta name="relnum" content="Release 3.2" /> <meta name="partnum" content="E11947-01" /> <link rel="copyright" href="dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> <link rel="stylesheet" href="dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> <link rel="up" href="preface.htm" title="Home" type="text/html" /> <link rel="up" href="bldr_pgs.htm" title="Working with Application Pages" type="text/html" /> <link rel="up" href="bldr_pg_edit.htm" title="Editing a Page Definition" type="text/html" /> <link rel="up" href="bldr_pg_proc_ctrl.htm" title="About Page Processing" type="text/html" /> <link rel="prev" href="bldr_pg_rndr_ctrl.htm" title="Previous" type="text/html" /> <link rel="next" href="concept_shared_comp.htm" title="Next" type="text/html" /> </head> <body> <p id="BREADCRUMBING"><a href="preface.htm" title="Home">Home</a> > <a href="bldr_pgs.htm" title="Working with Application Pages">Working with Application Pages</a> > <a href="bldr_pg_edit.htm" title="Editing a Page Definition">Editing a Page Definition</a> > About Page Processing</p> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr valign="bottom"> <td align="left"></td> <td align="center"><a href="bldr_pg_rndr_ctrl.htm"><img src="dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="concept_shared_comp.htm"><img src="dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="CHDEIAAD" name="CHDEIAAD"></a></p> <div class="sect2"><!-- infolevel="all" infotype="General" --> <h1><a name="HTMDB04015|about page processing"></a>About Page <a id="sthref544" name="sthref544"></a><a id="sthref545" name="sthref545"></a>Processing</h1> <p>Page processing is the process of submitting a page. A page is typically submitted when a user clicks a button. Use the Page Processing section of the Page Definition to specify application logic such as computations, validations, processes, and branches. In general, the Application Express engine runs this logic in the order it appears on the Page Definition.</p> <img src="img/page_processing.gif" alt="Description of page_processing.gif follows" title="Description of page_processing.gif follows" longdesc="img_text/page_processing.htm" /><br /> <a id="sthref546" name="sthref546" href="img_text/page_processing.htm">Description of the illustration page_processing.gif</a><br /> <br /> <p>You can quickly navigate to a specific subsection by clicking the icons beneath the heading. When you select one of these icons, the subsection appears and all other subsections are temporarily hidden. To restore the view, click <span class="bold">Show All</span>. The Show All icon resembles an inverted triangle.</p> <a id="sthref547" name="sthref547"></a> <p class="subhead2">Topics:</p> <ul> <li> <p><a href="#CHDCGCBJ">Computations</a></p> </li> <li> <p><a href="#CHDCJBHC">Validations</a></p> </li> <li> <p><a href="#CHDJFFIJ">Processes</a></p> </li> <li> <p><a href="#CHDIFEHC">Branches</a></p> </li> </ul> <div align="center"> <div class="inftblnotealso"><br /> <table class="NoteAlso oac_no_warn" summary="" cellpadding="3" cellspacing="0"> <tbody> <tr> <td align="left"> <p class="notep1">See Also:</p> <a href="bldr_pg_about.htm#CHDDGFFG">"About the Page Definition"</a>, <a href="bldr_pg_summary.htm#BABDGIJE">"About the Edit All Icon"</a>, and <a href="bldr_pg_copy_ctrl.htm#BABCCBGE">"About the Copy or Create Icons"</a></td> </tr> </tbody> </table> <br /></div> <!-- class="inftblnotealso" --></div> <a id="CHDCGCBJ" name="CHDCGCBJ"></a> <div class="sect3"><!-- infolevel="all" infotype="General" --> <h2><a name="HTMDB25124" id="HTMDB25124"></a>Comput<a id="sthref548" name="sthref548"></a>ations</h2> <p>Computations are units of logic used to assign session state to items and are executed at the time the page is processed.</p> <div align="center"> <div class="inftblnotealso"><br /> <table class="NoteAlso oac_no_warn" summary="" cellpadding="3" cellspacing="0"> <tbody> <tr> <td align="left"> <p class="notep1">See Also:</p> <a href="bldr_pg_comp.htm#BABDAAFC">"Understanding Page Computations"</a></td> </tr> </tbody> </table> <br /></div> <!-- class="inftblnotealso" --></div> </div> <!-- class="sect3" --> <a id="CHDCJBHC" name="CHDCJBHC"></a> <div class="sect3"><!-- infolevel="all" infotype="General" --> <h2><a name="HTMDB25125" id="HTMDB25125"></a>Valida<a id="sthref549" name="sthref549"></a>tions</h2> <p>Validations enable you to create logic controls to verify whether user input is valid. For example, a validation can check whether a value has been entered into a mandatory field.</p> <div align="center"> <div class="inftblnotealso"><br /> <table class="NoteAlso oac_no_warn" summary="" cellpadding="3" cellspacing="0"> <tbody> <tr> <td align="left"> <p class="notep1">See Also:</p> <a href="bldr_validate.htm#CHDEBBCE">"Understanding Validations"</a> and <a href="concept_sub_strings.htm#CHDDCFIJ">"About the When Button Pressed Attribute"</a></td> </tr> </tbody> </table> <br /></div> <!-- class="inftblnotealso" --></div> </div> <!-- class="sect3" --> <a id="CHDJFFIJ" name="CHDJFFIJ"></a> <div class="sect3"><!-- infolevel="all" infotype="General" --> <h2><a name="HTMDB25126" id="HTMDB25126"></a>Process<a id="sthref550" name="sthref550"></a>es</h2> <p>Processes are logic controls used to execute data manipulation language (DML) or PL/SQL. Processes are executed after the page is submitted.</p> <div align="center"> <div class="inftblnotealso"><br /> <table class="NoteAlso oac_no_warn" summary="" cellpadding="3" cellspacing="0"> <tbody> <tr> <td align="left"> <p class="notep1">See Also:</p> <a href="bldr_pg_procs_about.htm#CJGJBJHG">"Understanding Page Processes"</a></td> </tr> </tbody> </table> <br /></div> <!-- class="inftblnotealso" --></div> </div> <!-- class="sect3" --> <a id="CHDIFEHC" name="CHDIFEHC"></a> <div class="sect3"><!-- infolevel="all" infotype="General" --> <h2><a name="HTMDB25127" id="HTMDB25127"></a>Branc<a id="sthref551" name="sthref551"></a>hes</h2> <p>Branches enable you to create logic controls that determine how the user navigates through the application.</p> <div align="center"> <div class="inftblnotealso"><br /> <table class="NoteAlso oac_no_warn" summary="" cellpadding="3" cellspacing="0"> <tbody> <tr> <td align="left"> <p class="notep1">See Also:</p> <a href="bldr_branches_about.htm#CHDDFEFH">"Understanding Branches"</a> and <a href="concept_sub_strings.htm#CHDDCFIJ">"About the When Button Pressed Attribute"</a></td> </tr> </tbody> </table> <br /></div> <!-- class="inftblnotealso" --></div> </div> <!-- class="sect3" --></div> <!-- class="sect2" --> <!-- Start Footer --> <div class="footer"> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr> <td align="left"><span class="copyrightlogo">Copyright © 2003, 2009, Oracle and/or its affiliates. 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