Deep linking uses the deeplink URL query parameter to create external bookmarks to the Discovery Framework.
http://portalhost:port/path/to/page?deeplink=JSON-ARRAY-OF-DATASOURCE-STATESThe following is a record filter example:
http://localhost:8080/web/guest?deeplink=[{"default": {"queryFunctions":[{"class":"RecordFilter","recordFilter": "Designation:BestBuy"}]}}]