Problem with External Grammar File

[sureshkuyilath]

I have been experimenting with different grammar formats. We have the platform version 2.5.0.12, with the Sphinx ASR. I could not get this external grammar file working. The platform reports grammar error.

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<?xml version="1.0" encoding="iso-8859-1"?>

<grammar mode="dtmf" type="application/srgs+xml" root="nbr" xml:lang="en-US" version="1.0" >
	<rule id="nbr" scope="public">
		<one-of>
			<item>1</item>
			<item>2</item>
			<item>3</item>
			<item>4</item>
			<item>"*"</item>
			<item>"#"</item>
		</one-of>
	</rule>
</grammar>

The same grammar segment works perfectly if I declare inline. Please advice what I am doing wrong?

[support]

Hello,

You should be providing the IVR tag, <grammar>, (and it's data) in the local reference rather than in the remote IVR grammar. An example VXML file would look like:

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<?xml version="1.0"?>
<vxml version="2.0">
<form>
  <field name="field1">
    <prompt>Please press a digit</prompt>
    <grammar src="remotegrammar.grxml" mode="dtmf" type="application/srgs+xml" root="nbr" xml:lang="en-US" version="1.0"/>
  </field>
</form>
</vxml>

And your remote IVR grammar would look like:

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<rule id="nbr" scope="public">
  <one-of>
    <item>1</item>
    <item>2</item>
    <item>3</item>
    <item>4</item>
    <item>"*"</item>
    <item>"#"</item>
  </one-of>
</rule>

Hope this helps.

Regards,
Plum Support

[sureshkuyilath]

Thanks. That worked. But, I am still confused.
Is that true according to the SRGS spec? The way I understood, the external grammar file must be a well formed XML document with elements from the namespace "http://www.w3.org/2001/06/grammar" version="1.0".
The spec also gives examples such grammars. Why is this different here? Is this an implementation limitation ?

Thanks,
Suresh

[support]

Hello,

Yes, this is currently a limitation of the Plum IVR Platform. We require that the local grammar reference contain the information about the IVR grammar load and that the external IVR grammar provide the data within that <grammar> tag. We are working towards complete standardization and do plan to support the standard format as well for external IVR grammars in the future.

Regards,
Plum Support

[sureshkuyilath]

Thanks and glad to know that this will be available in the future. Lack of this will restrict portability, and also prevent the usage of third party grammars.
Regards,
Suresh