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<h1>Page Configurations</h1>
<p>
Page configurations are mainly used by <tt>TPageService</tt> to modify or append the application configuration. As the name indicates, a page configuration is associated with a directory storing some page files. It is stored as an XML file named <tt>config.xml</tt>.
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<p>
When a user requests a page stored under <tt>&lt;BasePath&gt;/dir1/dir2</tt>, the <tt>TPageService</tt> will try to parse and load <tt>config.xml</tt> files under <tt>&lt;BasePath&gt;</tt>, <tt>&lt;BasePath&gt;/dir1</tt> and <tt>&lt;BasePath&gt;/dir1/dir2</tt>. Paths, modules, and parameters specified in these configuration files will be appended or merged into the existing application configuration. Here <tt>&lt;BasePath&gt;</tt> is as defined in <a href="?page=Fundamentals.Services">page service</a>.
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<p>
The format of a page configuration file is as follows,
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<configuration>
  <paths>
    <alias id="AliasID" path="AliasPath" />
    <using namespace="Namespace" />
  </paths>
  <modules>
    <module id="ModuleID" class="ModuleClass"  PropertyName="PropertyValue" ... />
  </modules>
  <authorization>
    <allow pages="PageID1,PageID2" users="User1,User2" roles="Role1,Role2" verb="get" />
    <deny pages="PageID1,PageID2" users="User1,User2" roles="Role1,Role2" verb="post" />
  </authorization>
  <pages PropertyName="PropertyValue" ...>
    <page id="PageID" PropertyName="PropertyValue" ... />
  </pages>
  <parameters>
    <parameter id="ParameterID" class="ParameterClass" PropertyName="PropertyValue" ... />
  </parameters>
</configuration>
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<p>
The <tt>&lt;paths&gt;</tt>, <tt>&lt;modules&gt;</tt> and <tt>&lt;parameters&gt;</tt> are similar to those in an application configuration. The <tt>&lt;authorization&gt;</tt> specifies the authorization rules that apply to the current page directory and all its subdirectories. It will be explained in more detail in future sections. The <tt>&lt;pages&gt;</tt> element specifies the initial values for the properties of pages. Each <tt>&lt;page&gt;</tt> element specifies the initial property values for a particular page identified by the <tt>id</tt> attribute. Initial property values given in the <tt>&lt;pages&gt;</tt> element apply to all pages in the current directory and all its subdirectories.
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<p>
Complete specification of page configurations can be found in the <a href="<%~../../../../../docs/specs/config.dtd%>">DTD</a> and <a href="<%~../../../../../docs/specs/config.xsd%>">XSD</a> files.
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