VXML - Voice eXtensible Markup Language
SSML - Speech Synthesis Markup Language
OCMP - OpenCall Media Platform
OCMP supports <mark> element.
In VXML 2.1 recommendation, <mark> element places a marker into the tag/text sequence.
It is used to detect barge-in during prompt playback.
One of the properties in <mark> element is marktime.
Marktime is the number of milliseconds that elapsed since the last mark was executed by the SSML processor until barge-in occured or the end of audio playback occured. If no mark was executed, this variable is undefined.
There could be a problem of "error.semantic" get thrown when using marktime in OCMP 4.4.1 while with same application it might running fine or problem is not noticeable in OCMP 4.0.2.