XmlmmCIF equivalent: struct_sheet_order Data items in the STRUCT_SHEET_ORDER category record details about the order of the residue ranges that form a beta sheet. All order linkages are pairwise, and the specified pairs are assumed to be adjacent to one another in the sheet. These data items are an alternative to the STRUCT_SHEET_TOPOLOGY data items, and they allow for the formal description of all manner of sheets. XmlmmCIF equivalent: struct_sheet_order/offset Designates the relative position in the sheet, plus or minus, of the second residue range to the first. XmlmmCIF equivalent: struct_sheet_order/sense A flag to indicate whether the two designated residue ranges are parallel or anti-parallel to one another. XmlmmCIF equivalent: struct_sheet_order/sheet_id This data item is a pointer to _struct_sheet.id in the STRUCT_SHEET category. XmlmmCIF equivalent: struct_sheet_order/range_id_1 This data item is a pointer to _struct_sheet_range.id in the STRUCT_SHEET_RANGE category. XmlmmCIF equivalent: struct_sheet_order/range_id_2 This data item is a pointer to _struct_sheet_range.id in the STRUCT_SHEET_RANGE category.