<!-- 
VoiceXML 2.1 DTD (20060322)

Copyright 1998-2006 W3C (MIT, ERCIM, Keio), All Rights Reserved. 

Permission to use, copy, modify and distribute the VoiceXML DTD and 
its accompanying documentation for any purpose and without fee is 
hereby granted in perpetuity, provided that the above copyright 
notice and this paragraph appear in all copies.  

The copyright holders make no representation about the suitability 
of the DTD for any purpose. It is provided "as is" without expressed 
or implied warranty.
-->

<!ENTITY % audio "#PCDATA | audio | enumerate | value">
<!ENTITY % bargeintype "( speech | hotword )">
<!ENTITY % boolean "(true|false)">
<!ENTITY % content.type "CDATA">
<!ENTITY % duration "CDATA">
<!ENTITY % event.handler "catch | help | noinput | nomatch | error">
<!ENTITY % event.name "NMTOKEN">
<!ENTITY % event.names "NMTOKENS">
<!ENTITY % executable.content "%audio; | assign | clear | data | disconnect | 
    exit | foreach |goto | if | log | prompt | 
    reprompt | return | script | submit | throw | var ">
<!ENTITY % expression "CDATA">
<!ENTITY % restrictedvariable.name "CDATA">
<!ENTITY % variable.name "CDATA">
<!ENTITY % restrictedvariable.names "CDATA">
<!ENTITY % variable.names "CDATA">
<!ENTITY % integer "CDATA">
<!ENTITY % item.attrs "name     %restrictedvariable.name; #IMPLIED 
    cond        %expression;    #IMPLIED
    expr        %expression;    #IMPLIED ">
<!ENTITY % uri "CDATA">
<!ENTITY % cache.attrs "fetchhint   (prefetch|safe) #IMPLIED
    fetchtimeout    %duration;  #IMPLIED
    maxage      %integer;   #IMPLIED
    maxstale    %integer;   #IMPLIED">
<!ENTITY % next.attrs "next     %uri;       #IMPLIED
    expr        %expression;    #IMPLIED ">
<!ENTITY % submit.attrs "method     (get|post)  'get'
    enctype     %content.type;  'application/x-www-form-urlencoded'
    namelist    %variable.names;    #IMPLIED">
<!ENTITY % throw.attrs "event       %event.name;    #IMPLIED
    eventexpr   %expression;    #IMPLIED
    message     CDATA       #IMPLIED
    messageexpr %expression;    #IMPLIED">
<!ENTITY % variable "block | data | field | var">
<!--================================= Root ================================-->
<!ELEMENT vxml (%event.handler; | data | form | link | menu | meta | metadata | 
                property | script | var)+>
<!ATTLIST vxml
    application %uri; #IMPLIED
    xml:base %uri; #IMPLIED
    xml:lang NMTOKEN #IMPLIED
    xmlns CDATA #FIXED 'http://www.w3.org/2001/vxml'
    xmlns:xsi CDATA #IMPLIED
    xsi:schemaLocation CDATA #IMPLIED
    version CDATA #REQUIRED
>
<!ELEMENT meta EMPTY>
<!ATTLIST meta
    name NMTOKEN #IMPLIED
    content CDATA #REQUIRED
    http-equiv NMTOKEN #IMPLIED
>

<!ELEMENT metadata ANY>

<!--================================ Prompts ==============================-->
<!-- definitions adapted from SSML 1.0 DTD -->
<!ENTITY % structure "p | s">
<!ENTITY % sentence-elements "break | emphasis | mark | phoneme | prosody | 
                              say-as | voice | sub">
<!-- addition of enumerate and value elements as 'allowed-within-sentence' 
     audio elements -->
<!ENTITY % allowed-within-sentence " %audio; | %sentence-elements; ">

<!-- Prompt is modelled on SSML 1.0 DTD speak element:
- addition of 'bargein', 'bargeintype', 'cond', 'count' and 'timeout' attributes
- removal of xmlns, xmlns:xsi, and xsi:schemaLocation attributes
- version attribute fixed as "1.0"
-->
<!ELEMENT prompt (%allowed-within-sentence; | foreach | %structure; | lexicon 
                  | metadata | meta )*>
<!ATTLIST prompt
    bargein %boolean; #IMPLIED
    bargeintype %bargeintype; #IMPLIED
    cond %expression; #IMPLIED
    count %integer; #IMPLIED
    xml:lang NMTOKEN #IMPLIED
    timeout %duration; #IMPLIED
    xml:base %uri; #IMPLIED
    version CDATA #FIXED "1.0"
>
<!ELEMENT enumerate (%allowed-within-sentence; | %structure;)*>
<!ELEMENT reprompt EMPTY>

<!--================================= Dialogs =============================-->
<!ENTITY % input "grammar">
<!ENTITY % scope "(document | dialog)">
<!ELEMENT form (%input; | %event.handler; | filled | initial | object | link |
              property | record | script | subdialog | transfer | %variable;)*>
<!ATTLIST form
    id ID #IMPLIED
    scope %scope; "dialog"
>
<!ENTITY % accept.attrs "accept     (exact | approximate)   'exact'">
<!ELEMENT menu (%audio; | choice | %event.handler; | prompt | property)*>
<!ATTLIST menu
    id ID #IMPLIED
    scope %scope; "dialog"
    %accept.attrs; 
    dtmf %boolean; "false"
>
<!ELEMENT choice ( #PCDATA | %input; )*>
<!ATTLIST choice
    %cache.attrs; 
    accept  (exact | approximate) #IMPLIED
    dtmf CDATA #IMPLIED
    %throw.attrs; 
    fetchaudio %uri; #IMPLIED
    %next.attrs; 
>
<!--================================ Audio Output ==============================-->
<!-- definitions adapted from SSML 1.0 DTD -->
<!ELEMENT p (%allowed-within-sentence; | s)*>
<!ATTLIST p
    xml:lang NMTOKEN #IMPLIED
>
<!ELEMENT s (%allowed-within-sentence;)*>
<!ATTLIST s
    xml:lang NMTOKEN #IMPLIED
>
<!ELEMENT voice (%allowed-within-sentence; | %structure;)*>
<!ATTLIST voice
    xml:lang NMTOKEN #IMPLIED
    gender (male | female | neutral) #IMPLIED
    age %integer; #IMPLIED
    variant %integer; #IMPLIED
    name CDATA #IMPLIED
>
<!ELEMENT prosody (%allowed-within-sentence; | %structure;)*>
<!ATTLIST prosody
    pitch CDATA #IMPLIED
    contour CDATA #IMPLIED
    range CDATA #IMPLIED
    rate CDATA #IMPLIED
    duration %duration; #IMPLIED
    volume CDATA #IMPLIED
>
<!-- Changes to SSML 1.0 DTD audio element:
- src not obligatory, addition of 'expr' and caching attributes
-->
<!ELEMENT audio (%allowed-within-sentence; | %structure; | desc)*>
<!ATTLIST audio
    src %uri; #IMPLIED
    expr %expression; #IMPLIED
    %cache.attrs; 
>
<!ELEMENT desc (#PCDATA)>
<!ATTLIST desc
    xml:lang NMTOKEN #IMPLIED
>
<!ELEMENT emphasis (%allowed-within-sentence;)*>
<!ATTLIST emphasis
    level (strong | moderate | none | reduced) "moderate"
>
<!-- Changes to SSML 1.0 DTD say-as element:
- allows value element as child
-->
<!ELEMENT say-as (#PCDATA | value )*>
<!ATTLIST say-as
    interpret-as NMTOKEN #REQUIRED
    format NMTOKEN #IMPLIED
    detail NMTOKEN #IMPLIED
>
<!ELEMENT sub (#PCDATA)>
<!ATTLIST sub
    alias CDATA #REQUIRED
>
<!ELEMENT phoneme (#PCDATA)>
<!ATTLIST phoneme
    ph CDATA #REQUIRED
    alphabet CDATA #IMPLIED
>
<!ELEMENT break EMPTY>
<!ATTLIST break
    time CDATA #IMPLIED
    strength  (none | x-weak | weak  | medium | strong | x-strong) "medium"
>
<!ELEMENT mark EMPTY>
<!ATTLIST mark
    name ID #IMPLIED
    nameexpr %expression; #IMPLIED
>
<!--================================ Fields ===============================-->
<!ELEMENT field (%audio; | %event.handler; | filled | %input; | link | option |
                 prompt | property)*>
<!ATTLIST field
    %item.attrs; 
    type CDATA #IMPLIED
    slot NMTOKEN #IMPLIED
    modal %boolean; "false"
>
<!ELEMENT option (#PCDATA)>
<!ATTLIST option
    %accept.attrs; 
    dtmf CDATA #IMPLIED
    value CDATA #IMPLIED
>
<!ELEMENT var EMPTY>
<!ATTLIST var
    name %restrictedvariable.name; #REQUIRED
    expr %expression; #IMPLIED
>
<!ELEMENT initial (%audio; | %event.handler; | link | prompt | property)*>
<!ATTLIST initial
    %item.attrs; 
>
<!ELEMENT block (%executable.content;)*>
<!ATTLIST block
    %item.attrs; 
>
<!ELEMENT assign EMPTY>
<!ATTLIST assign
    name %variable.name; #REQUIRED
    expr %expression; #REQUIRED
>
<!ELEMENT clear EMPTY>
<!ATTLIST clear
    namelist %variable.names; #IMPLIED
>
<!ELEMENT value EMPTY>
<!ATTLIST value
    expr %expression; #REQUIRED
>
<!--================================== Events =============================-->
<!ENTITY % event.handler.attrs "count       %integer;   #IMPLIED
    cond        %expression;    #IMPLIED">
<!ELEMENT catch (%executable.content;)*>
<!ATTLIST catch
    event %event.names; #IMPLIED
    %event.handler.attrs; 
>
<!ELEMENT error (%executable.content;)*>
<!ATTLIST error
    %event.handler.attrs; 
>
<!ELEMENT help (%executable.content;)*>
<!ATTLIST help
    %event.handler.attrs; 
>
<!ELEMENT link (%input;)*>
<!ATTLIST link
    %cache.attrs; 
    %next.attrs; 
    fetchaudio %uri; #IMPLIED
    dtmf CDATA #IMPLIED
    %throw.attrs; 
>
<!ELEMENT noinput (%executable.content;)*>
<!ATTLIST noinput
    %event.handler.attrs; 
>
<!ELEMENT nomatch (%executable.content;)*>
<!ATTLIST nomatch
    %event.handler.attrs; 
>
<!ELEMENT throw EMPTY>
<!ATTLIST throw
    %throw.attrs; 
>
<!--============================= Grammar Input =============================-->
<!-- definitions adapted from SRGS 1.0 DTD -->
<!ENTITY % rule-expansion "#PCDATA | token | ruleref
                              | item | one-of | tag ">
<!ELEMENT ruleref EMPTY>
<!ATTLIST ruleref
    uri %uri; #IMPLIED
    type CDATA #IMPLIED
    special (NULL | VOID | GARBAGE) #IMPLIED
>
<!ELEMENT token (#PCDATA)>
<!ATTLIST token
    xml:lang NMTOKEN #IMPLIED
>
<!ELEMENT tag (#PCDATA)>
<!ELEMENT one-of (item)+>
<!ATTLIST one-of
    xml:lang NMTOKEN #IMPLIED
>
<!ELEMENT item (%rule-expansion;)*>
<!ATTLIST item
    repeat NMTOKEN #IMPLIED
    repeat-prob NMTOKEN #IMPLIED
    weight NMTOKEN #IMPLIED
    xml:lang NMTOKEN #IMPLIED
>
<!ELEMENT rule (%rule-expansion; | example)*>
<!ATTLIST rule
    id ID #REQUIRED
    scope (private | public) "private"
>
<!ELEMENT example (#PCDATA)>
<!ELEMENT lexicon EMPTY>
<!ATTLIST lexicon
    uri %uri; #REQUIRED
    type CDATA #IMPLIED
>
<!-- Changes to SRGS 1.0 DTD grammar element:
- mixed, unordered content model 
- addition of 'scope', 'src', 'type', 'weight' and caching attributes
- 'version' attribute is optional
- removal of xmlns, xmlns:xsi, and xsi:schemaLocation attributes
-->
<!ELEMENT grammar (#PCDATA | meta | metadata | lexicon | rule | tag)*>
<!ATTLIST grammar
    scope %scope; #IMPLIED
    src %uri; #IMPLIED
    srcexpr %expression; #IMPLIED
    type CDATA #IMPLIED
    weight CDATA #IMPLIED
    %cache.attrs; 
    tag-format %uri; #IMPLIED
    xml:base %uri; #IMPLIED
    version NMTOKEN #IMPLIED
    xml:lang NMTOKEN #IMPLIED
    root IDREF #IMPLIED
    mode (voice | dtmf) "voice"
>
<!--============================= Audio Input =============================-->
<!ELEMENT record (%audio; | %event.handler; | filled | %input; | prompt | 
                  property)*>
<!ATTLIST record
    %item.attrs; 
    type CDATA #IMPLIED
    beep %boolean; "false"
    maxtime %duration; #IMPLIED
    modal %boolean; "true"
    finalsilence %duration; #IMPLIED
    dtmfterm %boolean; "true"
>
<!--============================ Call Control ============================-->
<!ELEMENT disconnect EMPTY>
<!ATTLIST disconnect
    namelist %variable.names; #IMPLIED
>

<!ELEMENT transfer (%audio; | %event.handler; | filled | %input; | prompt | 
                    property)*>
<!ATTLIST transfer
    %item.attrs; 
    dest %uri; #IMPLIED
    destexpr %expression; #IMPLIED
    bridge %boolean; #IMPLIED
    type NMTOKEN #IMPLIED
    connecttimeout %duration; #IMPLIED
    maxtime %duration; #IMPLIED
    transferaudio %uri; #IMPLIED
    aai CDATA #IMPLIED
    aaiexpr %expression; #IMPLIED
>
<!--============================ Control Flow ============================-->
<!ENTITY % if.attrs "cond       %expression;    #REQUIRED">
<!ELEMENT if (%executable.content; | elseif | else)*>
<!ATTLIST if
    %if.attrs; 
>
<!ELEMENT elseif EMPTY>
<!ATTLIST elseif
    %if.attrs; 
>
<!ELEMENT else EMPTY>
<!ELEMENT exit EMPTY>
<!ATTLIST exit
    expr %expression; #IMPLIED
    namelist %variable.names; #IMPLIED
>
<!ELEMENT filled (%executable.content;)*>
<!ATTLIST filled
    mode (any | all) #IMPLIED
    namelist %restrictedvariable.names; #IMPLIED
>

<!-- executable content + contents of prompt  -->
<!ELEMENT foreach (%executable.content; | %sentence-elements; | 
    %structure; )*
>
<!ATTLIST foreach
    item %restrictedvariable.name; #REQUIRED
    array CDATA #REQUIRED
>

<!ELEMENT goto EMPTY>
<!ATTLIST goto
    %cache.attrs; 
    %next.attrs; 
    fetchaudio %uri; #IMPLIED
    expritem %expression; #IMPLIED
    nextitem %restrictedvariable.name; #IMPLIED
>
<!ELEMENT param EMPTY>
<!ATTLIST param
    name NMTOKEN #REQUIRED
    expr %expression; #IMPLIED
    value CDATA #IMPLIED
    valuetype (data | ref) "data"
    type CDATA #IMPLIED
>
<!ELEMENT return EMPTY>
<!ATTLIST return
    namelist %variable.names; #IMPLIED
    %throw.attrs; 
>
<!ELEMENT subdialog (%audio; | %event.handler; | filled | param | prompt | 
                     property)*>
<!ATTLIST subdialog
    %item.attrs; 
    src %uri; #IMPLIED
    srcexpr %expression; #IMPLIED
    %cache.attrs; 
    fetchaudio %uri; #IMPLIED
    %submit.attrs; 
>
<!ELEMENT submit EMPTY>
<!ATTLIST submit
    %cache.attrs; 
    %next.attrs; 
    fetchaudio %uri; #IMPLIED
    %submit.attrs; 
>
<!--========================== Miscellaneous ==============================-->
<!ELEMENT data EMPTY>
<!ATTLIST data
    name %restrictedvariable.name; #IMPLIED
    src %uri; #IMPLIED
    srcexpr %expression; #IMPLIED 
    fetchaudio  %uri;       #IMPLIED
    %submit.attrs;
    %cache.attrs;
>

<!ELEMENT log (#PCDATA | value)*>
<!ATTLIST log
    label CDATA #IMPLIED
    expr %expression; #IMPLIED
>
<!ELEMENT object (%audio; | %event.handler; | filled | param | prompt | 
                  property)*>
<!ATTLIST object
    %item.attrs; 
    %cache.attrs; 
    classid %uri; #IMPLIED
    codebase %uri; #IMPLIED
    data %uri; #IMPLIED
    type CDATA #IMPLIED
    codetype CDATA #IMPLIED
    archive %uri; #IMPLIED
>
<!ELEMENT property EMPTY>
<!ATTLIST property
    name NMTOKEN #REQUIRED
    value CDATA #REQUIRED
>
<!ELEMENT script (#PCDATA)>
<!ATTLIST script
    src %uri; #IMPLIED
    srcexpr %expression; #IMPLIED
    charset CDATA #IMPLIED
    %cache.attrs; 
>