The PROPERTY_META_DATA_EXT_VECTOR structure defines a concrete type for a sequence of attribute stamps.

 typedef struct {
   [range(0,1048576)] DWORD cNumProps;
   [size_is(cNumProps)] PROPERTY_META_DATA_EXT rgMetaData[];
 } PROPERTY_META_DATA_EXT_VECTOR;

cNumProps: The number of items in the rgMetaData array.

rgMetaData: An array of attribute stamps.