Last Updated: 04-10-2007
Exposes platform-specific functionality for use by a VoiceXML application.
classid = "URI"
fetchhint = "string"
fetchtimeout = "string"
maxage = "seconds"
maxstale = "seconds"
name = "ECMAScript_variable"
- Required. The URI specifying the location of the object's implementation.
||Indicates the object should be used to invoke re-recognition.
- Defines when the interpreter context may retrieve objects
from the server.
||Objects may be prefetched.
||Objects may only be fetched when needed, never before.
- The time in seconds (s) or milliseconds (ms) for the VoiceXML interpreter to wait
for content to be returned by the HTTP server before throwing an
The fetchtimeout value is rounded down to the nearest
whole second (e.g., 5700ms or 5.7s would be rounded down to 5s).
If fetchtimeout has a value less than 1 second,
it is reset to the default value.
The default value is 15s.
HTTP header along with the request for the specified resource.
The header indicates that the document is willing to use content whose age is no greater
than the specified time in seconds, unless maxstale is also provided.
Voice application developers should use extreme caution when setting this attribute. If used improperly,
it could have an adverse affect on the performance of your application.
You should only consider using this attribute in requests for frequently changing content (e.g. dynamically generated
content) hosted on a misconfigured HTTP server that you do not control.
To reduce load, some HTTP servers are configured to indicate to clients that content expires some arbitrary time in the future.
In that case, set the maxage attribute to 0.
If you do control the HTTP server,
you should instead configure the HTTP server to omit the expires header and possibly
to send the Cache-Control: no-cache
The former requires the VoiceXML interpreter to
check with the server
before using any cached content.
The latter requires the VoiceXML interpreter to not cache the fetched resource.
Instructs the VoiceXML interpreter to send a
header along with the HTTP request for the specified resource.
The header indicates that the document is willing to use content that has exceeded its expiration time
by no more than the specified number of seconds.
Voice application developers should use extreme caution when setting this attribute.
If used improperly, your application may present stale content to users.
If you do control the HTTP server,
you should instead configure the HTTP server to send an expires header with a time in the distant future.
- Required. When the object is evaluated, this variable is set to an
ECMAScript value whose type is defined by the object.
is the only functionality exposed via the object element on the Tellme platform.
|If any of the fetchtimeout, fetchhint,
maxage, or maxstale attributes is not specified
for an object element, then the value of the
property, respectively, is used.
Currently, the fetchhint,
maxage, and maxstale attributes on object
are merely validated. These attributes are only relevant for the
fetching of objects, and the only object currently supported by the
Tellme platform is built into the platform, not fetched.
The fetchtimeout attribute (or property, if the attribute
is not specified) is used to control the fetching of the grammar(s)
specified in a re-recognition object's
The grammar-specific properties
can be used to control the fetching semantics of the grammar(s)
used by the re-recognition object.
If any of the
fetchhint, maxage, or maxstale
values is invalid, the interpreter throws
If a fetchtimeout value is invalid,
the interpreter throws error.badfetch.
See the re-recognition tutorial
for an example that demonstrates the use of the object element.