Once constructed, a track data hub can be imported into the Genome Browser for viewing by entering the URL of the hub.txt file on the ‘My Hubs’ tab of the track data hubs web page (http://genome.ucsc.edu/cgi-bin/hgHubConnect). The Genome Browser track data hub import utility supports Internet protocols such as http://, https://, and (less efficiently) ftp://, as well as file paths relative to the hub directory hierarchy.