VAST-2.0-root-element Root element must be <VAST> VAST Spec VAST-2.0-root-version <VAST> must have a version attribute VAST Spec VAST-2.0-root-version-value VAST version attribute must be a recognised version string VAST XSD VAST-2.0-root-has-ad-or-error <VAST> must contain at least one <Ad> or <Error> VAST Spec VAST-4.0-wrapper-root-error <VAST> root contains both <Ad> and <Error> elements (invalid per VAST 4.0) VAST Spec VAST-2.0-ad-has-inline-or-wrapper Each <Ad> must contain exactly one <InLine> or <Wrapper> VAST Spec VAST-2.0-inline-adsystem <InLine> must contain <AdSystem> VAST Spec VAST-2.0-inline-adtitle <InLine> must contain <AdTitle> VAST Spec VAST-2.0-inline-impression <InLine> must contain at least one <Impression> VAST Spec VAST-2.0-inline-creatives <InLine> must contain <Creatives> with at least one <Creative> VAST Spec VAST-4.1-adservingid-present <InLine> must contain <AdServingId> (VAST 4.1+) VAST Spec VAST-4.0-universaladid-present <Creative> must contain <UniversalAdId> (VAST 4.0+) VAST Spec VAST-4.0-universaladid-idregistry <UniversalAdId> must have an idRegistry attribute VAST Spec VAST-4.0-universaladid-idvalue <UniversalAdId> missing required idValue attribute (VAST 4.0) VAST Spec VAST-4.1-universaladid-idvalue-removed <UniversalAdId> idValue attribute was removed in VAST 4.1 VAST Spec VAST-4.1-universaladid-content <UniversalAdId> must have text content in VAST 4.1+ VAST Spec VAST-2.0-linear-duration <Linear> must contain <Duration> VAST Spec VAST-2.0-linear-mediafiles <Linear> must contain <MediaFiles> with at least one <MediaFile> VAST Spec VAST-2.0-mediafile-delivery <MediaFile> must have a delivery attribute VAST Spec VAST-2.0-mediafile-delivery-enum <MediaFile> delivery must be "progressive" or "streaming" VAST XSD VAST-2.0-mediafile-type <MediaFile> must have a type attribute VAST Spec VAST-2.0-mediafile-dimensions <MediaFile> must have width and height attributes VAST Spec VAST-2.0-wrapper-adsystem <Wrapper> must contain <AdSystem> VAST Spec VAST-2.0-wrapper-impression <Wrapper> must contain at least one <Impression> VAST Spec VAST-2.0-wrapper-vastadtaguri <Wrapper> must contain <VASTAdTagURI> VAST Spec VAST-2.0-companion-resource <Companion> must contain at least one StaticResource, IFrameResource, or HTMLResource VAST Spec VAST-2.0-nonlinear-resource InLine <NonLinear> must contain at least one StaticResource, IFrameResource, or HTMLResource VAST Spec VAST-2.0-wrapper-depth Wrapper chain depth exceeds the configured maximum VAST Spec VAST-2.0-ad-sequence Mixed use of sequence attribute across <Ad> elements in a pod VAST Spec VAST-2.0-duration-format <Duration> value does not match HH:MM:SS[.mmm] format VAST Spec VAST-2.0-text-only-element Text-only element contains a child element VAST XSD VAST-2.0-unknown-attribute Element has an attribute not defined in the VAST spec VAST XSD VAST-2.0-inline-unknown-child <InLine> contains an unrecognised child element VAST XSD VAST-2.0-wrapper-unknown-child <Wrapper> contains an unrecognised child element VAST XSD VAST-2.0-creatives-unknown-child <Creatives> may only contain <Creative> elements VAST XSD VAST-2.0-creative-unknown-child <Creative> contains an unrecognised child element VAST XSD VAST-2.0-linear-unknown-child <Linear> contains an unrecognised child element VAST XSD VAST-2.0-trackingevents-unknown-child <TrackingEvents> may only contain <Tracking> elements VAST XSD VAST-2.0-mediafiles-unknown-child <MediaFiles> contains an unrecognised child element VAST XSD VAST-2.0-extensions-unknown-child <Extensions> may only contain <Extension> elements VAST XSD VAST-2.0-videoclicks-unknown-child <VideoClicks> contains an unrecognised child element VAST XSD VAST-2.0-nonlinearads-unknown-child <NonLinearAds> contains an unrecognised child element VAST XSD VAST-2.0-nonlinear-unknown-child <NonLinear> contains an unrecognised child element VAST XSD VAST-2.0-companionads-unknown-child <CompanionAds> may only contain <Companion> elements VAST XSD VAST-2.0-companion-unknown-child <Companion> contains an unrecognised child element VAST XSD VAST-2.0-creativeextensions-unknown-child <CreativeExtensions> may only contain <CreativeExtension> elements VAST XSD VAST-2.0-extension-misplaced-element <Extension> contains an element that has a dedicated location in the VAST spec VAST Spec VAST-2.0-creative-extension-misplaced-element <CreativeExtension> contains an element that has a dedicated location in the VAST spec VAST Spec VAST-2.0-mediafile-https <MediaFile> URL uses HTTP instead of HTTPS, blocked by mixed-content policy on secure inventory Industry Best Practice VAST-2.0-tracking-https Tracking or click URL uses HTTP instead of HTTPS, blocked by mixed-content policy, measurement signal lost Industry Best Practice VAST-2.0-url-empty URL field is empty VAST Spec VAST-2.0-url-invalid URL field does not appear to be a valid URI RFC 3986 VAST-2.0-parse-error XML parse error, document may be malformed XML VAST-2.0-version-mismatch Declared version does not match structural signals Inferred VAST-2.0-duplicate-impression Duplicate <Impression> URL within the same <Ad>, causes double-counted billing and disputes Industry Best Practice VAST-2.0-nonlinear-dimensions <NonLinear> missing width or height VAST Spec VAST-2.0-companion-dimensions <Companion> missing width or height VAST Spec VAST-2.0-flash-mediafile Flash-based MediaFile type is no longer supported Inferred VAST-2.0-linear-tracking-quartiles <Linear> has no standard quartile tracking events, impression serves but measurement system receives no signal Industry Best Practice VAST-3.0-icons-unknown-child <Icons> may only contain <Icon> elements VAST XSD VAST-3.0-icon-unknown-child <Icon> contains an unrecognised child element VAST XSD VAST-3.0-iconclicks-unknown-child <IconClicks> contains an unrecognised child element VAST XSD VAST-3.0-progress-offset <Tracking event="progress"> requires an offset attribute VAST Spec VAST-3.0-progress-offset-format Tracking progress offset does not match required format VAST Spec VAST-3.0-icon-attrs Icon missing recommended attributes (program/width/height/position) VAST Spec VAST-3.0-icon-program <Icon> missing required program attribute VAST Spec VAST-3.0-icon-width <Icon> missing required width attribute VAST Spec VAST-3.0-icon-height <Icon> missing required height attribute VAST Spec VAST-3.0-icon-xposition <Icon> missing required xPosition attribute VAST Spec VAST-3.0-icon-yposition <Icon> missing required yPosition attribute VAST Spec VAST-3.0-icon-resource <Icon> must have at least one resource element VAST Spec VAST-3.0-skipoffset-format Linear skipoffset does not match HH:MM:SS[.mmm] or n% format VAST Spec VAST-3.0-skip-event-no-skipoffset skip tracking event present but Linear has no skipoffset attribute VAST Spec VAST-3.0-minmaxbitrate-pair <MediaFile> must have both minBitrate and maxBitrate or neither VAST Spec VAST-3.0-bitrate-conflict <MediaFile> has both bitrate and minBitrate/maxBitrate VAST Spec VAST-3.0-pricing-model <Pricing> missing required model attribute VAST Spec VAST-3.0-pricing-currency <Pricing> missing required currency attribute VAST Spec VAST-3.0-pricing-model-case <Pricing> model value should be lowercase in VAST 3.0 (cpm/cpc/cpe/cpv) VAST XSD VAST-3.0-pricing-currency-format <Pricing> currency attribute must be a 3-letter ISO-4217 code ISO 4217 VAST-3.0-companion-required-attr <CompanionAds> required attribute must be all, any, or none VAST XSD VAST-4.0-conditionalad conditionalAd attribute is deprecated as of VAST 4.1 VAST Spec VAST-4.0-wrapper-clickthrough <ClickThrough> inside Wrapper <VideoClicks> was removed in VAST 4.0 (re-allowed in 4.2) VAST Spec VAST-4.0-tracking-event-removed fullscreen/exitFullscreen tracking events were removed in VAST 4.0 VAST Spec VAST-4.0-mediafile-apiframework <MediaFile apiFramework> is deprecated in VAST 4.0+, use <InteractiveCreativeFile> VAST Spec VAST-4.0-category-authority <Category> missing required authority attribute VAST Spec VAST-4.0-companion-clicktracking-id <CompanionClickTracking> missing required id attribute VAST Spec VAST-4.0-interactive-creative-no-api <InteractiveCreativeFile> should have an apiFramework attribute VAST Spec VAST-4.1-adservingid-present <InLine> must contain <AdServingId> (VAST 4.1+) VAST Spec VAST-4.1-ad-serving-id-empty <AdServingId> is present but empty Inferred VAST-4.1-survey-deprecated <Survey> is deprecated as of VAST 4.1 VAST Spec VAST-4.1-vpaid-apiframework apiFramework="VPAID" is deprecated as of VAST 4.1 VAST Spec VAST-4.1-mezzanine-delivery <Mezzanine> missing required delivery attribute VAST Spec VAST-4.1-mezzanine-type <Mezzanine> missing required type attribute VAST Spec VAST-4.1-mezzanine-width <Mezzanine> missing required width attribute VAST Spec VAST-4.1-mezzanine-height <Mezzanine> missing required height attribute VAST Spec VAST-4.1-mezzanine-recommended <MediaFiles> has no <Mezzanine>, ad-stitching servers may reject in CTV/SSAI contexts Industry Best Practice VAST-4.1-verification-no-resource <Verification> should have JavaScriptResource or ExecutableResource VAST Spec VAST-4.1-verification-vendor <Verification> is missing required vendor attribute VAST Spec VAST-4.1-blockedadcategories-no-authority <BlockedAdCategories> should have authority attribute VAST Spec VAST-4.1-interactive-creative-type <InteractiveCreativeFile> should have a type attribute identifying the MIME type IANA Media Types VAST-4.1-js-resource-apiframework <JavaScriptResource> is missing required apiFramework attribute VAST Spec VAST-4.1-exec-resource-apiframework <ExecutableResource> is missing required apiFramework attribute VAST Spec VAST-4.1-exec-resource-type <ExecutableResource> is missing required type attribute VAST Spec VAST-4.1-tracking-event-value Tracking event attribute not in the valid set for this VAST version VAST XSD VAST-4.1-adtype-value Ad adType must be video, audio, or hybrid VAST XSD VAST-4.1-companion-renderingmode-value Companion renderingMode must be default, end-card, or concurrent VAST XSD VAST-4.1-vpaid-in-interactive-context VPAID MediaFile alongside InteractiveCreativeFile, VPAID unsupported in CTV, zero fill Industry Best Practice VAST-4.2-closedcaptionfiles-unknown-child <ClosedCaptionFiles> may only contain <ClosedCaptionFile> elements VAST XSD VAST-4.2-icon-fallback-image-width-height <IconClickFallbackImage> should have width and height attributes VAST Spec VAST-4.3-js-resource-browser-optional <JavaScriptResource> should have a browserOptional attribute VAST Spec SIMID-1.0-simid-type-required <InteractiveCreativeFile apiFramework="SIMID"> must have type="text/html" SIMID Spec SIMID-1.0-simid-url-empty <InteractiveCreativeFile apiFramework="SIMID"> must contain a non-empty URL SIMID Spec SIMID-1.0-simid-url-https <InteractiveCreativeFile apiFramework="SIMID"> URL must use HTTPS SIMID Spec SIMID-1.0-simid-variable-duration-value <InteractiveCreativeFile> variableDuration attribute must be "true" when present SIMID Spec SIMID-1.0-simid-mediafile-required Linear SIMID ad must include a video/audio <MediaFile> alongside the interactive creative SIMID Spec SIMID-1.1-nonlinear-simid-no-iframe <NonLinear apiFramework="SIMID"> must contain an <IFrameResource> SIMID Spec SIMID-1.1-iframe-simid-type-required <IFrameResource> in SIMID <NonLinear> should have type="text/html" SIMID Spec SIMID-1.1-iframe-simid-url-empty <IFrameResource> in SIMID <NonLinear> must contain a non-empty URL SIMID Spec SIMID-1.1-iframe-simid-url-https <IFrameResource> in SIMID <NonLinear> URL must use HTTPS SIMID Spec