This read-write CvUriClassPreference object assigns a preference weight to the match length resulting from matching cvSIPUriClassCfgHostPattern against the host portion of a sip: URI. Administrators use it to control which URI class wins when multiple classes could match the same call based on host pattern, since preference influences tie-breaking among competing matches. For example, an admin with overlapping host-pattern classes for a broad domain and a more specific subdomain would set preferences so the more specific match takes priority.