| <comm_connection_string> | ::= "comm:"<port_id>[<options_list>] | "comm:"<wildcarded_port_id> |
| <port_id> | ::= non-empty string of alphanumeric characters ; ; ; Note: the port_id string is case sensitive. |
| <wildcarded_port_id> | ::= non-empty string of alphanumeric characters, terminated by "*" |
| <options_list> | ::= *(<baud_rate_string>| <bitsperchar>|
<stopbits>| <parity>|
<blocking>| <autocts>|
<autorts>) ;
; ; Note: the options_list string is case sensitive. ; ; If an option duplicates a previous option in the ; option list, that option overrides the previous option. |
| <baud_rate_string> | ::= ";baudrate="<baud_rate> |
| <baud_rate> | ::= non-empty string of digits |
| <bitsperchar> | ::= ";bitsperchar="<bit_value> |
| <bit_value> | ::= "7" | "8" |
| <stopbits> | ::= ";stopbits="<stop_value> |
| <stop_value> | ::= "1" | "2" |
| <parity> | ::= ";parity="<parity_value> |
| <parity_value> | ::= "even" | "odd" | "none" |
| <blocking> | ::= ";blocking="<on_off> |
| <autocts> | ::= ";autocts="<on_off> |
| <autorts> | ::= ";autorts="<on_off> |
| <on_off> | ::= "on" | "off" |
Note that, per RFC 3986, protocol schemes are case-insensitive. The above BNF reflects the normalized form.