<?xml version="1.0" encoding="US-ASCII" ?>   <!--       Draft DTD for CPL, corresponding to       draft-ietf-iptel-cpl-06.   -->   <!-- Nodes. -->   <!-- Switch nodes -->   <!ENTITY % Switch 'address-switch|string-switch|language-switch|                      time-switch|priority-switch' >   <!-- Location nodes -->   <!ENTITY % Location 'location|lookup|remove-location' >   <!-- Signalling action nodes -->   <!ENTITY % SignallingAction 'proxy|redirect|reject' >   <!-- Other actions -->   <!ENTITY % OtherAction 'mail|log' >   <!-- Links to subactions -->   <!ENTITY % Sub 'sub' >   <!-- Nodes are one of the above four categories, or a subaction.        This entity (macro) describes the contents of an output.        Note that a node can be empty, implying default action. -->   <!ENTITY % Node     '(%Location;|%Switch;|%SignallingAction;|                        %OtherAction;|%Sub;)?' >   <!-- Switches: choices a CPL script can make. -->   <!-- All switches can have an 'otherwise' output. -->   <!ELEMENT otherwise ( %Node; ) >   <!-- All switches can have a 'not-present' output. -->   <!ELEMENT not-present ( %Node; ) >   <!-- Address-switch makes choices based on addresses. -->   <!ELEMENT address-switch ( address*, (not-present, address*)?,                              otherwise? ) >   <!-- <not-present> must appear at most once -->   <!ATTLIST address-switch      field         CDATA    #REQUIRED      subfield      CDATA    #IMPLIED   >   <!ELEMENT address ( %Node; ) >   <!ATTLIST address      is            CDATA    #IMPLIED      contains      CDATA    #IMPLIED      subdomain-of  CDATA    #IMPLIED   > <!-- Exactly one of these three attributes must appear -->   <!-- String-switch makes choices based on strings. -->   <!ELEMENT string-switch ( string*, (not-present, string*)?,                             otherwise? ) >   <!-- <not-present> must appear at most once -->   <!ATTLIST string-switch      field         CDATA    #REQUIRED   >   <!ELEMENT string ( %Node; ) >   <!ATTLIST string      is            CDATA    #IMPLIED      contains      CDATA    #IMPLIED   >  <!-- Exactly one of these two attributes must appear -->   <!-- Language-switch makes choices based on the originator's preferred        languages. -->   <!ELEMENT language-switch ( language*, (not-present, language*)?,                               otherwise? ) >   <!-- <not-present> must appear at most once -->   <!ELEMENT language ( %Node; ) >   <!ATTLIST language      matches      CDATA     #REQUIRED   >   <!-- Time-switch makes choices based on the current time. -->   <!ELEMENT time-switch ( time*, (not-present, time*)?, otherwise? ) >   <!ATTLIST time-switch      tzid          CDATA    #IMPLIED      tzurl         CDATA    #IMPLIED   >   <!ELEMENT time ( %Node; ) >   <!-- Exactly one of the two attributes "dtend" and "duration"        must occur. -->   <!-- The value of "freq" is (daily|weekly|monthly|yearly).  It is           case-insensitive, so it is not given as a DTD switch. -->   <!-- None of the attributes following freq are meaningful unless freq            appears. -->   <!-- The value of "wkst" is (MO|TU|WE|TH|FR|SA|SU).  It is           case-insensitive, so it is not given as a DTD switch. -->   <!ATTLIST time      dtstart       CDATA  #REQUIRED      dtend         CDATA  #IMPLIED      duration      CDATA  #IMPLIED      freq          CDATA  #IMPLIED      until         CDATA  #IMPLIED      count         CDATA  #IMPLIED      interval      CDATA  "1"      bysecond      CDATA  #IMPLIED      byminute      CDATA  #IMPLIED      byhour        CDATA  #IMPLIED      byday         CDATA  #IMPLIED      bymonthday    CDATA  #IMPLIED      byyearday     CDATA  #IMPLIED      byweekno      CDATA  #IMPLIED      bymonth       CDATA  #IMPLIED      wkst          CDATA  "MO"      bysetpos      CDATA  #IMPLIED   >   <!-- Priority-switch makes choices based on message priority. -->   <!ELEMENT priority-switch ( priority*, (not-present, priority*)?,                               otherwise? ) >   <!-- <not-present> must appear at most once -->   <!ENTITY % PriorityVal '(emergency|urgent|normal|non-urgent)' >   <!ELEMENT priority ( %Node; ) >   <!-- Exactly one of these three attributes must appear -->   <!ATTLIST priority      less          %PriorityVal;  #IMPLIED      greater       %PriorityVal;  #IMPLIED      equal         CDATA          #IMPLIED   >   <!-- Locations: ways to specify the location a subsequent action        (proxy, redirect) will attempt to contact. -->   <!ENTITY % Clear  'clear (yes|no) "no"' >   <!ELEMENT location ( %Node; ) >   <!ATTLIST location      url           CDATA    #REQUIRED      priority      CDATA    #IMPLIED      %Clear;   >   <!-- priority is in the range  0.0 - 1.0.  Its default value SHOULD         be 1.0 -->   <!ELEMENT lookup ( success?,notfound?,failure? ) >   <!ATTLIST lookup     source         CDATA     #REQUIRED     timeout        CDATA     "30"     use            CDATA     #IMPLIED     ignore         CDATA     #IMPLIED     %Clear;   >   <!ELEMENT success  ( %Node; ) >   <!ELEMENT notfound ( %Node; ) >   <!ELEMENT failure ( %Node; ) >   <!ELEMENT remove-location ( %Node; ) >   <!ATTLIST remove-location      param         CDATA    #IMPLIED      value         CDATA    #IMPLIED      location      CDATA    #IMPLIED   >   <!-- Signalling Actions: call-signalling actions the script can        take. -->   <!ELEMENT proxy ( busy?,noanswer?,redirection?,failure?,default? ) >   <!-- The default value of timeout is "20" if the <noanswer> output        exists. -->   <!ATTLIST proxy      timeout       CDATA    #IMPLIED      recurse       (yes|no) "yes"      ordering      (parallel|sequential|first-only) "parallel"   >   <!ELEMENT busy ( %Node; ) >   <!ELEMENT noanswer ( %Node; ) >   <!ELEMENT redirection ( %Node; ) >   <!-- "failure" repeats from lookup, above. -->   <!ELEMENT default ( %Node; ) >   <!ELEMENT redirect EMPTY >   <!ATTLIST redirect      permanent     (yes|no) "no"   >   <!-- Statuses we can return -->   <!ELEMENT reject EMPTY >   <!-- The value of "status" is (busy|notfound|reject|error), or a SIP        4xx-6xx status. -->   <!ATTLIST reject      status        CDATA    #REQUIRED      reason        CDATA    #IMPLIED   >   <!-- Non-signalling actions: actions that don't affect the call -->   <!ELEMENT mail ( %Node; ) >   <!ATTLIST mail      url           CDATA    #REQUIRED   >   <!ELEMENT log ( %Node; ) >   <!ATTLIST log      name          CDATA    #IMPLIED      comment       CDATA    #IMPLIED   >   <!-- Calls to subactions. -->   <!ELEMENT sub EMPTY >   <!ATTLIST sub      ref           IDREF    #REQUIRED   >   <!-- Ancillary data -->   <!ENTITY % Ancillary 'ancillary?' >   <!ELEMENT ancillary EMPTY >   <!-- Subactions -->   <!ENTITY % Subactions 'subaction*' >   <!ELEMENT subaction ( %Node; )>   <!ATTLIST subaction      id            ID       #REQUIRED   >   <!-- Top-level actions -->   <!ENTITY % TopLevelActions 'outgoing?,incoming?' >   <!ELEMENT outgoing ( %Node; )>   <!ELEMENT incoming ( %Node; )>   <!-- The top-level element of the script. -->   <!ELEMENT cpl  ( %Ancillary;,%Subactions;,%TopLevelActions; ) >