Apps Configuring Auto Backup for Apps

[carimair]

In the guide on setting the manifest it shows the following
<application ...
android:fullBackupContent="@xml/mybackupscheme">
</app>
Any idea what the @ symbol signifies, being a very new student I have no idea what it refers to and can find no reference to it anywhere . Also when configuring the xml file,it refers to which of the many choices of xml types should I use when selecting "NEW" in android studio .

 

[Deleted User]

It's a notation for referencing a resource in your project structure. In this case @xml/mybackupscheme refers to the file

res/xml/mybackupscheme.xml

 

[carimair]

Thanks for your guidance, I had thought that the @ symbol had some specific significance. Now all I hope for is some guidance on the choice of the xml file type.