To make an application dock itself to one of the edges of the desktop we use the property anchor with a value of true.
We can also indicate where we would like the application to start, by using the position property.
To auto-hide--i.e., slide off the desktop when the user moves their mouse away from the application--we use the property autohide with a value of true.
By adding the following settings to the Flickr Search web application we would dock the application to the top right of the screen, and make it auto-hide:
<link rel="stylesheet" href="flickr.css" type="text/css" />
<meta name="position" content="top-right" />
<meta name="anchor" content="true" />
<meta name="autohide" content="true" />
<xf:model>
Note that the location of a window with a position of 'top right' and one with a position of 'right top' will be the same. The difference is only apparent when docking; the first will be docked to the top edge, whilst the second will be docked to the right edge. This means that when auto-hiding, a window that is positioned 'top right' will slide off the top, whilst a window that is positioned 'right top' will slide off the right.
The modified application is available here.
If the webapp is being loaded via the command-line then we can open the basic (unmodified) web application using the following command:
swviewer2 http://svn.x-port.net/svn/public/samples/flickr/flickr.webapp#meta(position=top-right,anchor,autohide)