2.4.2 BrtACBegin

The BrtACBegin record specifies the beginning of an alternate content block as specified by future record (section 2.1.6).


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cver

RgACVer (variable)

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cver (2 bytes): An unsigned integer that specifies the count of ACProductVersion (section 2.5.1) structures in RgACVer. MUST be greater than or equal to 1.

RgACVer (variable): An array of ACProductVersion (section 2.5.1) structures that specifies the applications and versions that can process the alternate content block. The count of items in this array MUST be equal to cver.