The <log> element allows an application to generate a logging or debug message, which a developer can use to help in application development or post-execution analysis of application performance.

The contents of the log tag will be written straight into the standard logs as a “debugging” message. Verbose logging must be turned on in order to view these messages.

<?xml version="1.0"?>
<vxml version="2.0">
  <form>
    <field name="someinput" type="digits">
      <prompt>
        Please say or enter some digits.
      </prompt>
      <filled>
        <log label="mylog">My log says <value expr="someinput"/></log>
      </filled>
    </field>
  </form>
</vxml>

The output of the above script would be:

Computer: Please say or enter some digits.
Human: One two three four five six seven eight nine.
The following entry would then be added to the log:
Tue 19 Nov 2002 03:24:07 PM EST (000000;001;1037737318) [mylog] LOCAL: My log says 123456789

<value>

<block>, <catch>, <error>, <filled>, <foreach>, <help>, <if>, <noinput>, <nomatch>