VAST-4.1-universaladid-idvalue-removed
VAST-4.1-universaladid-idvalue-removed
<UniversalAdId> idValue attribute was removed in VAST 4.1
WarningRequired fieldsIAB VAST 4.1 §2.3.4VAST 4.1, 4.2, and 4.3
Short answer
The idValue attribute was replaced by element text content in VAST 4.1. If your tag targets 4.1+ players, use element text content instead.
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. Required-field failures usually stop validation early because the platform cannot determine the basic shape of the ad, the creative metadata, or the mandatory tracking payload. Affected scope: VAST 4.1, 4.2, and 4.3.
How to fix
Remove the idValue attribute and place the ad identifier as the text content of <UniversalAdId> instead.
Check your VAST tag for
VAST-4.1-universaladid-idvalue-removed and other issues instantly.Validate a tag →Other Required fields rules
VAST-2.0-root-elementRoot element must be <VAST>VAST-2.0-root-version<VAST> must have a version attributeVAST-2.0-root-version-valueVAST version attribute must be a recognised version stringVAST-2.0-root-has-ad-or-error<VAST> must contain at least one <Ad> or <Error>VAST-4.0-wrapper-root-error<VAST> root contains both <Ad> and <Error> elements (invalid per VAST 4.0)VAST-2.0-ad-has-inline-or-wrapperEach <Ad> must contain exactly one <InLine> or <Wrapper>VAST-2.0-inline-adsystem<InLine> must contain <AdSystem>VAST-2.0-inline-adtitle<InLine> must contain <AdTitle>