+/** Return 1 when the specified string contains a valid service type, 0 otherwise */
+int avahi_is_valid_service_type(const char *t);
+
+/** Return 1 when the specified string contains a valid domain name, 0 otherwise */
+int avahi_is_valid_domain_name(const char *t);
+
+/** Return 1 when the specified string contains a valid service name, 0 otherwise */
+int avahi_is_valid_service_name(const char *t);
+
+/** Return 1 when the specified string contains a valid non-FQDN host name (i.e. without dots), 0 otherwise */
+int avahi_is_valid_host_name(const char *t);
+
+/** Return some kind of hash value for the domain, useful for using domains as hash table keys. */
+unsigned avahi_domain_hash(const char *name);