marshal.dtd

SIP（Session Initiation Protocol）是由IETF定义

<!ELEMENT marshalServer (type, group, gateway?, noResponseTimer, allowUnbillableCalls, conferenceBridge?)>
<!ATTLIST marshalServer host CDATA #REQUIRED
                        port CDATA #REQUIRED
>

<!ELEMENT type EMPTY>
<!ATTLIST type value ( UserAgent | Gateway | ConferenceBridge | Internetwork) #REQUIRED>

<!ELEMENT group EMPTY>
<!ATTLIST group value CDATA #REQUIRED>


<!ELEMENT gateway EMPTY>
<!ATTLIST gateway  host CDATA #REQUIRED
                   port CDATA #REQUIRED>

<!ELEMENT noResponseTimer EMPTY>
<!ATTLIST noResponseTimer value CDATA #REQUIRED>

<!ELEMENT allowUnbillableCalls EMPTY>
<!ATTLIST allowUnbillableCalls value ( true | false ) #REQUIRED>

<!ELEMENT conferenceBridge (bridgeNumber, accessList)>

<!ELEMENT bridgeNumber EMPTY>
<!ATTLIST bridgeNumber value CDATA #REQUIRED>

<!ELEMENT accessList (accessNumber*)>

<!ELEMENT accessNumber EMPTY>
<!ATTLIST accessNumber value CDATA #REQUIRED>