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VoiceXML elements and attributes

Tag Attributes Available in VoiceXML 2 Available in VoiceXML 2.1 Available in VoiceXML 3.0 Limitation or Extensions, Supporting information
<assign>

  • name

  • expr

 Yes Yes   Supports all attributes.
<audio>

  • src

  • fetchtimeout

  • fetchhint

  • maxage

  • maxstale

  • expr

 Yes Yes   Supports all other attributes except fetchhint.
<block>

  • name

  • expr

  • cond

 Yes Yes   Supports all attributes.
<catch>

  • event

  • count

  • cond

 Yes Yes   Supports all attributes.
<choice>

  • dtmf

  • accept

  • next

  • expr

  • event

  • eventexpr

  • message

  • messageexpr

  • fetchaudio

  • fetchhint

  • fetchtimeout

  • maxage

  • maxstale

 Yes Yes   Supports all attributes except message, messageexpr, and fetchhint.
<clear>

  • namelist

 Yes Yes   Supports the namelist attribute.
<initial>

  • name

  • expr

  • cond

 Yes Yes   Supports all attributes.
<disconnect>

  • namelist

 No Yes   Supports the namelist attribute.
<else>

  • name

  • expr

  • cond

 Yes Yes   Supports all attributes.
<error> count

cond

 Yes Yes   Supports all attributes.
<exit> expr

namelist

 Yes Yes   Supports all attributes.
<field>

  • name

  • expr

  • cond

  • type

  • slot

  • modal

 Yes Yes   Supports all attributes.
<filled>

  • mode

  • namelist

 Yes Yes   Supports all attributes.
<form>

  • id

  • scope

 Yes Yes   Supports all attributes.
<goto>

  • next

  • expr

  • nextitem

  • expritem

  • fetchaudio

  • fetchint

  • fetchtimeout

  • maxage

  • maxstale

 Yes Yes   Supports all attributes.
<grammar>

  • version

  • xml:lang

  • mode

  • root

  • tag-format

  • xml:base

  • src

  • scope

  • type

  • weight

  • fetchhint

  • fetchtimeout

  • maxage

  • maxstale

  • srcexpr

Yes Yes   Supports all attributes except fetchhint.
<help>

  • count

  • cond

 Yes Yes   Supports all attributes.
<if> (optional <else> and <elseif> elements)   Yes Yes   Supports the if element.
<link>

  • next

  • expr

  • eventexpr

  • message

  • messageexpr

  • dtmf

  • fetchaudio

  • fetchhint

  • fetchtimeout

  • maxage

  • maxstale

 Yes Yes   Supports all attributes except fetchhint.
<log>

  • label

  • expr

 Yes Yes   Supports all attributes.
<mark> ( an SSML element)

  • name

  • nameexpr

  • markname

  • marktime

  • name — Yes

  • nameexpr — No

  • markname — No

  • marktime — No

 Yes   Supports name and nameexpr only.
noteNote:

In VoiceXML 2.0, the ,<mark> element was ignored by VoiceXML platforms.
<media>

  • src

  • srcexpr

  • clipBegin

  • clipEnd

  • repeatDur

  • repeatCount

 No No Yes soundLevel not supported.
<menu>

  • id

  • scope

  • dtmf

  • accept

 Yes Yes   Supports all attributes.
<meta>

  • name

  • content

  • http-equiv

 Yes Yes   Currently inactive.
<metadata>

  • creator

  • rights

  • subject

 Yes Yes   Currently inactive.
<noinput>

  • count

  • cond

 Yes Yes   Supports all attributes.
<nomatch>

  • count

  • cond

 Yes Yes   Supports all attributes.
<object>

  • name

  • expr

  • cond

  • classid

  • codebase

  • codetype

  • data

  • type

  • archive

  • fetchhint

  • fetchtimeout

  • maxage

  • maxage

 Yes Yes   Currently inactive.
<option>

  • dtmf

  • accept

  • value

 Yes Yes   Currently inactive.
<param>

  • name

  • expr

  • value

  • valuetype

  • type

 Yes Yes  

  • Currently inactive — valuetype and type.

  • Supports all the other attributes.
<prompt>

  • bargein

  • bargeintype

  • cond

  • count

  • timeout

  • xml:lang

  • xml:base

 Yes Yes   Supports all attributes.
<property>

  • name

  • value

 Yes Yes   Supports all attributes.
<record>

  • name

  • expr

  • cond

  • modal

  • beep

  • maxtime

  • finalsilence

  • dtmfterm

  • type

 Yes Yes   Supports all attributes.
<reprompt>   Yes Yes   Supports the <reprompt> element.
<return>

  • event

  • eventexpr

  • message

  • messageexpr

  • namelist

 Yes Yes   Supports all attributes.
<script>

  • src

  • charset

  • fetchhint

  • fetchtimeout

  • maxage

  • maxstale

  • srcexpr

  • srcexpr — No

  • Rest of the attributes— Yes

 Yes   Supports all attributes except fetchhint.
<subdialog>

  • name

  • expr

  • cond

  • namelist

  • srcexpr

  • method

  • enctype

  • fetchaudio

  • fetchtimeout

  • maxage

  • maxstale

 Yes Yes   Supports all attributes.
<submit>

  • next

  • expr

  • namelist

  • method

  • enctype

  • fetchaudio

  • fetchhint

  • fetchtimeout

  • maxage

  • maxstale

 Yes Yes   Supports all attributes except fetchhint.
<throw>

  • event

  • eventexpr

  • message

  • messageexpr

 Yes Yes   Supports all attributes.
<transfer>

  • name

  • expr

  • cond

  • dest

  • destexpr

  • bridge

  • connecttimeout

  • maxtime

  • transferaudio

  • aai

  • aaiexpr

  • type

  • type — No

  • Rest of the attributes — Yes

 Yes   Supports all attributes.
<value> expr Yes Yes   Supports the attribute.
<var>

  • name

  • expr

 Yes Yes   Supports all attributes.
<vxml>

  • version

  • xmlns

  • xml:base

  • xml:lang_d

  • application

 Yes Yes   Supports all attributes.
<data>

  • src

  • name

  • srcexpr

  • method

  • namelist

  • enctype

  • fetchaudio

  • fetchhint

  • fetchtimeout

  • maxage

  • maxstale

 No Yes   Supports all attributes except fetchhint.
<foreach>

  • array

  • item

 No Yes   Supports all attributes.
<receive>

  • fetchaudio

  • fetchaudioexpr

  • maxtime

  • maxtimeexpr

 No No Yes Only works from launching the CCXML application to the launched application.
<send>

  • async

  • asyncexpr

  • body

  • bodyexpr

  • contenttype

  • contenttypeexpr

  • event

  • eventexpr

  • fetchaudio

  • fetchaudioexpr

  • namelist

  • timeout

  • timeoutexpr

 No No Yes Only works from launching the CCXML application to the launched application. The target and targetexpr attributes must not be specified.
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August 2025
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