VAST-2.0-duration-zero
<Duration> is zero, so quartiles and complete cannot fire
Short answer
00:00:00 matches the duration format and still describes an ad of no length. A player cannot fire quartiles or complete. Write the real length, for example 00:00:15. 00:00:60 is a different error: seconds must be 00-59, so one minute is 00:01:00.
Why this matters in production
This rule is a strong risk signal. Tags with this issue often still parse, but they become brittle across SDKs, SSAI resolvers, and CTV environments. Value-format rules tend to fail at the moment a player interprets a field such as duration, skipoffset, bitrate, or versioning. They are especially painful because the XML can look valid at a glance. Affected scope: VAST 2.0 and later (all versions).
How to fix
Replace 00:00:00 with the real creative length, e.g. 00:00:15. A zero duration cannot fire quartiles or complete.
Invalid
<Duration>00:00:00.000</Duration>Valid
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