XmlmmCIF equivalent: refln_sys_abs Data items in the REFLN_SYS_ABS category record details about the reflection data that should be systematically absent, given the designated space group. XmlmmCIF equivalent: refln_sys_abs/I The measured value of the intensity in arbitrary units. XmlmmCIF equivalent: refln_sys_abs/I_over_sigmaI The ratio of _refln_sys_abs.I to _refln_sys_abs.sigmaI. Used to evaluate whether a reflection that should be systematically absent according to the designated space group is in fact absent. XmlmmCIF equivalent: refln_sys_abs/sigmaI The standard uncertainty (e.s.d.) of _refln_sys_abs.I, in arbitrary units. XmlmmCIF equivalent: refln_sys_abs/index_h Miller index h of the reflection. The values of the Miller indices in the REFLN_SYS_ABS category must correspond to the cell defined by cell lengths and cell angles in the CELL category. XmlmmCIF equivalent: refln_sys_abs/index_k Miller index k of the reflection. The values of the Miller indices in the REFLN_SYS_ABS category must correspond to the cell defined by cell lengths and cell angles in the CELL category. XmlmmCIF equivalent: refln_sys_abs/index_l Miller index l of the reflection. The values of the Miller indices in the REFLN_SYS_ABS category must correspond to the cell defined by cell lengths and cell angles in the CELL category.