2.4.720 BrtPCDH15
The BrtPCDH15 record specifies extensions to the BrtBeginPCDHierarchy (section 2.4.146) record where a measure cache hierarchy can aggregate another cache hierarchy. For this record to be present, fMeasure field of the BrtBeginPCDHierarchy MUST be 1.
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FRTHeader (4 bytes): An FRTBlank (section 2.5.55) that specifies the future record (section 2.1.6) information for this record.
ihdbAggregatedColumn (4 bytes): An IHDB (section 2.5.78) which specifies the cache hierarchy that this measure cache hierarchy aggregates. fAttributeHierarchy of the referenced cache hierarchy MUST be 1.