how's the string "http://a9.com/-/spec/opensearch/1.1" used in XStream081Configuration.java ?

[Han Nguyen]

Hi,
At a quick glance, the string "http://a9.com/-/spec/opensearch/1.1"; looks 
like one of the namespaces used in the XStream081Configuration.java class. 
But does anyone know exactly how the string is used in Shindig?
Is it used to invoke any search? and if so then where does it search and 
how Shindig consumes  the search results?
Thanks much!
Han