Maxstale

The maxstale attribute relates to the maximum amount of time that is allowed before a cached file becomes stale. The tags that have the maxstale attribute are <audio/>, <choice/>, <data/>, <goto/>, <grammar/>, <link/>, <script/>, <subdialog/>, and <submit/>. The type of file cached depends upon the tag that is being used to pull the cached file.

By setting a maxstale attribute within one of the tags mentioned above, one can set the number of seconds to “extend” the life of a cached file. If a cached file would have expired 120 seconds ago, but maxstale is set to “300”, a local cached file will be sent back to the IVR platform without first verifying the status of the file from the source site. The maxstale attribute, along with maxage attribute, is useful for the purpose of caching files, reducing the amount of delay required to fetch a new copy of a file.

External Links:

• VoiceXML 2.0 Spec - W3C
• How Caching Works - Plum IVR Documentation