Video Ad Serving Template

Video Ad Serving Template (VAST) 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.

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