VMAP-1.0-embedded-vast-version
VMAP-1.0-embedded-vast-version
Embedded VAST is not version 3.0 — VMAP players are only required to support VAST 3.0
InfoVMAPIAB VMAP 1.0.1 §3.2VMAP 1.0 (all VMAP documents)
Short answer
The VMAP 1.0 spec mandates player support for VAST 3.0. An embedded VAST document at a different version may not be processed correctly by all VMAP-compliant players.
Why this matters in production
This rule is advisory rather than fatal, but it still matters for portability, debugging speed, and keeping tags predictable across different buyers and playback stacks. 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).
Check your VAST tag for
VMAP-1.0-embedded-vast-version and other issues instantly.Open the VAST tag validator →Other VMAP rules
VMAP-1.0-root-versionRoot `<VMAP>` element must have a version attributeVMAP-1.0-root-version-value`<VMAP>` version attribute should be `"1.0"` — the only published VMAP versionVMAP-1.0-root-namespace`<VMAP>` should declare the VMAP namespace URI http://www.iab.net/videosuite/vmapVMAP-1.0-root-unknown-child`<VMAP>` may only contain `<AdBreak>` and `<Extensions>` elementsVMAP-1.0-adbreak-timeoffset`<AdBreak>` must have a timeOffset attributeVMAP-1.0-adbreak-timeoffset-format`<AdBreak>` timeOffset must be hh:mm:ss[.mmm], n%, `"start"`, `"end"`, or #mVMAP-1.0-adbreak-breaktype`<AdBreak>` must have a breakType attributeVMAP-1.0-adbreak-breaktype-value`<AdBreak>` breakType must be a comma-separated list of `"linear"`, `"nonlinear"`, or `"display"`