E-commerce Lecture 3

Ravi Raman

rraman@wvu.edu

CERC, West Virginia University

Sample Code: Tapered Prompts

• <form id="tapered">• <block>• <prompt bargein="false">Welcome to the ice cream

survey.</prompt>• </block>• <field name="flavor">• <grammar>vanilla|chocolate|strawberry</grammar>• <prompt count="1">What is your favorite flavor?</prompt>• <prompt count="3">Say chocolate, vanilla, or

strawberry.</prompt>• <help>Sorry, no help is available.</help>• </field>• </form>

Source: VoiceXML Forum

Contents of Forms

• Form items– Field items– Control items

• Variable declarations (non-field items)

• Event Handlers

• Filled actions

Form Field Items

• Field – value to be obtained using speech or keypad input

• Record – an audio recording of speech input

• Transfer – transfer to another destination

• Object – invoke an external object

• Sub-dialog – invoke a VoiceXML dialog

Variables

• name – name of variable

• expr – optional initial value of variable

• <var name=“customer” expr=“Joe Smith”/>

• <var name=“phone” expr=“8005551234”/>

Assign

• Assigns a value to a variable

• <assign name=“fax” expr=“phone+1”/>

Clear

• Resets one or more form items– Variable is set to undefined– Prompt and event counters for those for items are

reinitialized

• <clear namelist=“name address phone”/>

• Namelist – names of the form items to be reset. Default all form items in current form.

Branching Logic: If, Else, Elseif

• <if cond=“light == ‘red’”>

• <prompt> Stop. </prompt>

• <elseif cond=“light==‘green’”>

• <prompt> Stop. </prompt>

• <else/>

• <prompt> Go FAST </prompt>

• </if>

Conditional Operators

• Must be “escaped”• > “&gt;”• < “&lt;”• >=• <=• &&

• Typical ECMA operators

• != • ==• ||

Grammars

• Speech Grammars

• DTMF Grammars (keypad input)

Speech Grammars

– Specifies speech input and corresponding actions

– Grammar Formats• Java Speech API Grammar Format (JSGF)

– Inline or External File

Speech Grammars

• External File– <grammar src=“http://…” type=“mime-type”/>

• Inline– <grammar> genie </grammar>

– <grammar type=“application/x-jsgf”> • Exit | finished | over | end | stop | done

– </grammar>

Multilingual Phonetics

• The International Phonetic Association

• http://www2.arts.gla.ac.uk/IPA/ipa.html

Menus

• Simple form with one anonymous field

• Prompts user for selection

• Executes action based on user’s choice

Sample Menu

• <menu>• <prompt>Welcome home. Say one of: <enumerate/></prompt>

• <choice next="http://www.sports.org/start.vxml">• Sports </choice>• <choice next="http://www.weather.org/intro.vxml">• Weather </choice>• <choice next="http://www.stargazer.org/astronews.vxml">

• Stargazer astrophysics news </choice>• <noinput>Please say one of <enumerate/></noinput>• </menu>

Menu with DTMF

• <menu dtmf="true">• <prompt>• Welcome home.• <enumerate>• For <value expr="_prompt"/>, press <value

expr="_dtmf"/>.• </enumerate>• </prompt>• <choice next="http://www.sports.org/start.vxml">• sports </choice>• <choice next="http://www.weather.org/intro.vxml">• weather </choice>• <choice next="http://www.stargazer.org/astronews.vxml">• Stargazer astrophysics news </choice>• </menu>

Motorola Development Tools

• www.motorola.com/developers/wireless/tools/– Click on link for Mobile Application Development Kit

– Need to register to download tools (link at bottom of page)

• After registration, – login (enable cookies in browser)– Download and install Motorola IDE using link at top of the

MIX Mobile ADK Download page– Fill in rest of form and download Mobile ADK– Install Motorola IDE before installing the Mobile ADK

Motorola Demos

• Motorola IDE

• MADK Simulator

E-commerce Lecture 3

Ravi Raman

rraman@wvu.edu

CERC, West Virginia University