VAST (Video Ad Serving Template) is a specification defined and released by the Interactive Advertising Bureau
IAB
that sets a standard for communication requirements between ad servers and video players in order to present video ads. It is a data structure declared using XML. VAST has 8 versions: 1.0 (deprecated), 1.1 (deprecated), 2.0, 2.0.1(The schema version as the official VAST 2.0 schema), 2.6, 3.0, 4.0, 4.1 and 4.2.

Request

In order to play a video ad in a video player, the video player sends a request to a VAST ad server. It is a simple HTTP based URL that typically appears as follows: http://www.example.com/?LR_PUBLISHER_ID=1331&LR_CAMPAIGN_ID=229&LR_SCHEMA=vast2-vpaid

Response

The ad server responds with a VAST data structure that declares these parameters: * The ad media that should be played * How the ad media should be played * What should be tracked as the media is played * The companion ad that should be displayed alongside the master ad For example, the above request returns the following response (trimmed): LiveRail DATA[LiveRail creative 1> iveRail_creative_1.html" ;"title="DATA[LiveRail creative 1">DATA[LiveRail creative 1> >
> ....... 00:00:09
>
> .......
> DA

> ...... ......

References

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Request

Response

References

See also