clear VoiceXML element - Zvon reference

ZVON > References > VoiceXML Reference

Element:	clear
Attributes:	\| namelist \|
Parents:	\| block \| catch \| error \| filled \| help \| if \| noinput \| nomatch \|
Description:	Go to Standard

Examples:

<vxml version="1.0" application="app-root.vxml">
     <form id="say_goodbye">
          <field name="answer" type="boolean">
               <prompt>Shall we say
                    <value expr="application.bye"/>?
               </prompt>
               <filled>
                    <if cond="answer">
                         <exit/>
                    </if>
                    <clear namelist="answer"/>
               </filled>
          </field>
     </form>
</vxml>

<form id="get_starting_and_ending_cities">
     <field name="start_city">
          <grammar src="http://www.grammars.example/voicexml/city.gram"/>
          <prompt>What is the starting city?</prompt>
     </field>
     <field name="end_city">
          <grammar src="http://www.grammars.example/voicexml/city.gram"/>
          <prompt>What is the ending city?</prompt>
     </field>
     <filled mode="any" namelist="start_city end_city">
          <if cond="start_city == end_city">
               <prompt> You can't fly from and to the same city. </prompt>
               <clear/>
          </if>
     </filled>
</form>

<vxml version="1.0">
     <form>
          <record name="greeting" beep="true" maxtime="10s" finalsilence="4000ms" dtmfterm="true" type="audio/wav">
               <prompt> At the tone, please say your greeting. </prompt>
               <noinput> I didn't hear anything, please try again. </noinput>
          </record>
          <field name="confirm" type="boolean">
               <prompt> Your greeting is
                    <value expr="greeting"/>.
               </prompt>
               <prompt> To keep it, say yes. To discard it, say no. </prompt>
               <filled>
                    <if cond="confirm">
                         <submit next="save_greeting.pl" method="post" namelist="greeting"/>
                    </if>
                    <clear/>
               </filled>
          </field>
     </form>
</vxml>

<vxml version="1.0">
     <form>
          <transcribe name="message" beep="true" maxtime="30s">
               <prompt> What is the message you want to leave? </prompt>
               <nomatch count="2"> Try to make your message simpler. </nomatch>
               <nomatch count="3"> Transferring to operator.
                    <goto next="queue_caller.pl"/>
               </nomatch>
          </transcribe>
          <field name="confirm" type="boolean">
               <prompt> Your message is
                    <value expr="message"/>.
               </prompt>
               <prompt> To send it, say yes. To discard it, say no. </prompt>
               <filled>
                    <if cond="confirm">
                         <submit next="send_page.pl" namelist="message"/>
                    </if>
                    <clear/>
               </filled>
          </field>
     </form>
</vxml>

<vxml version="1.0">
     <form>
          <var name="hours"/>
          <var name="minutes"/>
          <var name="seconds"/>
          <block>
               <script> var d = new Date(); hours = d.getHours(); minutes = d.getMinutes(); seconds = d.getSeconds(); </script>
          </block>
          <field name="hear_another" type="boolean">
               <prompt> The time is
                    <value expr="hours"/> hours,
                    <value expr="minutes"/> minutes, and
                    <value expr="seconds"/> seconds.
               </prompt>
               <prompt>Do you want to hear another time?</prompt>
               <filled>
                    <if cond="hear_another">
                         <clear/>
                    </if>
               </filled>
          </field>
     </form>
</vxml>

<form id="survey_2000_03_30">
     <catch event="exit">
          <goto nextitem="confirm_exit"/>
     </catch>
     <block>
          <prompt> Hello, you have been called at random to answer questions critical to U.S. foreign policy. </prompt>
     </block>
     <field name="q1" type="boolean">
          <prompt>Do you agree with the IMF position on privatizing certain functions of Burkina Faso’s agriculture ministry?</prompt>
     </field>
     <field name="q2" type="boolean">
          <prompt>If this privatization occurs, will its effects be beneficial mainly to Ouagadougou and Bobo-Dioulasso?</prompt>
     </field>
     <field name="q3" type="boolean">
          <prompt>Do you agree that sorghum and millet output might thereby increase by as much as four percent per annum?</prompt>
     </field>
     <block>
          <submit next="register" namelist="q1 q2 q3"/>
     </block>
     <field name="confirm_exit" type="boolean">
          <prompt>You have elected to exit. Are you sure you want to do this, and perhaps adversely affect U.S. foreign policy vis-à-vis sub-Saharan Africa for decades to come?</prompt>
          <filled>
               <if cond="confirm_exit"> Okay, but the U.S. State Department is displeased.
                    <exit/>
                    <else/> Good, let’s pick up where we left off.
                    <clear namelist="confirm_exit"/>
               </if>
          </filled>
     </field>
</form>

<vxml version="1.0">
     <property name="caching" value="safe"/>
     <property name="audiofetchhint" value="safe"/>
     <property name="confidence" value="0.75"/>
     <form>
          <property name="confidence" value="0.5"/>
          <property name="bargein" value="false"/>
          <grammar src="address_book.gram" type="application/x-jsgf"/>
          <block>
               <prompt> Welcome to the Voice Address Book </prompt>
          </block>
          <initial name="start">
               <property name="timeout" value="5s"/>
               <prompt> Who would you like to call? </prompt>
          </initial>
          <field name="person">
               <prompt> Say the name of the person you would like to call. </prompt>
          </field>
          <field name="location">
               <prompt> Say the location of the person you would like to call. </prompt>
          </field>
          <field name="confirm" type="boolean">
               <prompt> You said to call
                    <value expr="person$.utterance"/> at
                    <value expr="location$.utterance"/>. Is this correct?
               </prompt>
               <filled>
                    <if cond="confirm">
                         <submit next="http://www.messagecentral.example/voice/make_call" namelist="person location"/>
                    </if>
                    <clear/>
               </filled>
          </field>
     </form>
</vxml>

<form id="weather_info">
     <grammar src="cityandstate.gram" type="application/x-jsgf"/>
     <block>
          <prompt bargein="false"> Welcome to the weather information service.
               <audio src="http://www.online-ads.example/wis.wav"/>
          </prompt>
     </block>
     <initial name="start">
          <prompt> For what city and state would you like the weather? </prompt>
          <help> Please say the name of the city and state for which you you would like a weather report.</help>
          <noinput count="1">
               <reprompt/>
          </noinput>
          <noinput count="2">
               <reprompt/>
               <assign name="start" expr="true"/>
          </noinput>
     </initial>
     <field name="state">
          <prompt>What state?</prompt>
          <help>Please speak the state for which you want the weather.</help>
     </field>
     <field name="city">
          <prompt>Please say the city in
               <value expr="state"/> for which you want the weather.
          </prompt>
          <help>Please speak the city for which you want the weather.</help>
          <filled>
               <if cond="city == 'Los Angeles' && state == undefined">
                    <assign name="state" expr="'California'"/>
               </if>
          </filled>
     </field>
     <field name="go_ahead" type="boolean" modal="true">
          <prompt>Do you want to hear the weather for
               <value expr="city"/>,
               <value expr="state"/>?
          </prompt>
          <filled>
               <if cond="go_ahead">
                    <prompt bargein="false">
                         <audio src="http://www.online-ads.example/wis2.wav"/>
                    </prompt>
                    <submit next="/servlet/weather" namelist="city state"/>
               </if>
               <clear namelist="start city state go_ahead"/>
          </filled>
     </field>
</form>