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VoiceXML Quick Start Guide
By Jonathan Eisenzopf
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Step 3 - Modify the main.vxml dialog
Once you've created a new project, double-click the main.vxml
dialog in the project tab.
V-Builder includes the ability to drag and drop VoiceXML elements without having
to know the language.
The main.vxml dialog includes a default form. You
will need to make the following modifications:
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Re-name the form to "main" by selecting the properties tab and changing the name
attribute from "form1" to "main."
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Drag and drop a field object into the
form.
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Drop a grammar, prompt and filled object
into the field object.
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Drop a text object into the first prompt
object and enter the following phrase in the text area of the general tab on the
right, "What is your favorite color? Red, green or blue?" This will
prompt the user to say their favorite color.
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Drop a prompt object into the filled
object. This prompt will play back the color that the user selected.
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Drag a text
object into the prompt object and enter "You said" in the text
property text area.
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Drop a value object into the prompt object after the text
object and set the expr attribute to =color in the
property tab. This will output the user's selection that has been stored in the color field.
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Drop a clear object into the prompt object after the value object and set the namelist attribute to include the field color.
This clears out the color field.
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Finally, drop a goto object into the
prompt object after the clear object. Click on the "Select dialog and
form" option and select main.vxml from the dropdown.
Now it's time to fill in the grammar for the colors that
the system will recognize. For this example, we'll limit it to red, green and
blue.
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Select the grammar object and click on the "Use
Inline Grammar" option.
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Click the "Edit Inline Grammar"
button.
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Right click on the grammar window and select "Insert New
Expression".
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Enter the words red, green and blue in separate "Phrase
Text" fields and select the OK button. To add more words, click the
"Add Another Row" button.
The grammar diagram should now appear as below. This grammar
will match any of the three words in the list.
Your first VoiceXML dialog is now ready for testing. Save
the file and the proceed to Step 4.
Step 4 - Test the dialog
Now that the dialog has been completed, it's time to test
it within V-Builder by pressing the 
button to run to dialog. If this is the first time the dialog has been tested,
you will have to wait a few minutes for the speech recognition and TTS servers
to start up. Once the servers are ready, you will see a green light in the
"Run Dialog" window. Click the "Run Dialog" button. You will
hear a computerized voice prompting you to select red, green, or blue. When you
hear this, speak one of the colors into the microphone on your computer. The
Nuance recognizer will fill in the color field with the recognized value,
play it back and prompt again for a color until you click the "Hang
Up" button.
Continue on to Step 5 or repeat Step 3 and Step 4 until you
are satisfied with your new VoiceXML dialog.
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