For developers: Create a search index that applies to group of pages

By default, when you create Administration: Create search indexes in Sitefinity CMS, you cannot specify the pages to which the search index applies. Sitefinity CMS indexes the content of all pages. You can create a search index that applies only to a selection of pages under a group page by replacing the default PageInboundPipe with a custom one. 

To achieve this, perform the following:

1. Create a PageInboundPipeCustom.cs class, which inherits from the default PageInboundPipe class.
   
2. In the PageInboundPipeCustom.cs class, override the PushData() method. With this method, you get the pages under the group page that you want to include in the internal search and pass them to the base PushData() method:
   
3. To replace the default PageInboundPipe with the custom one, you need to unregister the default pipe and register the custom one in your Global.asax file:
   
4. Build the solution and restart the application.