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VAST-2.0-ctv-extension-payload

VAST-2.0-ctv-extension-payload

Standardized CTV extension must contain one element matching its type

ErrorCTV Addendum 2024IAB CTV Addendum 2024 (July 2024)VAST 2.0 and later (all versions)

Short answer

A recognized standardized extension must contain exactly one child element matching its type. Additional child elements, a mismatched element or surrounding text make the payload invalid.

Why this matters in production

This rule is usually a delivery blocker. Many players, SDKs, and ad servers will discard the response or skip the affected creative once this condition is hit. These rules validate supplied standardized payloads carried in legacy VAST extensions. Correct version and location handling preserves compatibility while checking ID registries, mezzanine assets, SIMID payloads and creative bindings. Optional addendum features remain optional. Affected scope: VAST 2.0 and later (all versions).

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Other CTV Addendum 2024 rules

VAST-2.0-ctv-mezzanine-valuesMezzanine dimensions must be non-negative integers and type must be a MIME typeVAST-2.0-ctv-extension-locationStandardized CTV extension is not defined at this version or locationVAST-2.0-ctv-universaladid-registryUniversalAdId extension requires idRegistry; a blank registry is accepted only for unknown IDsVAST-2.0-ctv-universaladid-registry-formatUniversalAdId extension idRegistry should be a registry name, root domain or unknownVAST-2.0-ctv-universaladid-contentUniversalAdId extension requires an ID in element text or unknownVAST-2.0-ctv-binding-unmatchedCTV extension binding must identify exactly one creative or media file in the same adVAST-2.0-ctv-binding-implicitCTV extension without a binding applies to the first creative in a multi-creative adVAST-2.0-ctv-interactive-apiInteractiveCreativeFile extension requires apiFramework=SIMID

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