field	type	length	key	description
`BDATJ`	numc	4	pk	fiscal year for year-dependent variant
`MANDT`	clnt	3	pk	client
`PERIV`	char	2	pk	fiscal year variant
`PESSION`	numc	3	pk	posting period
`BDIFF`	int1	3		year displacement for non-calendar fiscal years
`BUMON`	numc	2		calendar month of period end day
`BUTAG`	numc	2		calendar day of period end day
`POPER`	numc	3		posting period
`RELJR`	char	2		year shift relative to the current year

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