VASTlint
VMAP-1.0-root-unknown-child

VMAP-1.0-root-unknown-child

`<VMAP>` may only contain `<AdBreak>` and `<Extensions>` elements

ErrorVMAPIAB VMAP 1.0.1 §2.3.1VMAP 1.0 (all VMAP documents)

Short answer

The <VMAP> root element has a fixed set of allowed children: <AdBreak> and <Extensions>. Any other child element is a schema violation and will be ignored by players.

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. VMAP rules validate the ad break schedule envelope. Malformed break timing, wrong namespace declarations, or invalid AdSource content prevent players from resolving any of the ads in the playlist. Affected scope: VMAP 1.0 (all VMAP documents).

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