Glossary
Quick definitions for common terms you will see across the tools and guides.
VAST
VAST is an XML spec used to describe video ad tags, creatives, and tracking.
Wrapper
A VAST tag that points to another VAST tag, allowing multiple hops before the final media is served.
VASTAdTagURI
The URL inside a VAST Wrapper that points to the next VAST tag in the chain.
Schema validation
A strict check against official XSD rules to confirm an XML document matches the spec.
JSON
JavaScript Object Notation — a structured, lightweight data format used by APIs.
XML
Extensible Markup Language — a structured format using tags and attributes.
Pretty print
Formatting content with spacing and indentation to improve readability.
Minify
Removing unnecessary whitespace to make output compact for sharing or storage.
Redirect chain
A sequence of HTTP redirects that a URL follows before reaching its final destination.
User agent
A string sent by a browser or SDK that describes the device, OS, and app environment.
HLS
HTTP Live Streaming — a video format that uses an .m3u8 playlist and .ts segments.
M3U8
A playlist file that lists HLS video segments and playback order.
Regex
Regular expression — a pattern language for matching and transforming text.