Macro-Header Cross Reference Data © Copyright International Business Machines Corporation, 2008, 2023. All Rights Reserved. Macro to header cross reference data is provided to make it easier to know the header that must be updated to keep it in sync with its equivalent macro, and vice versa. The CSV file holds the raw data. Each field is delimited with a semi-colon. The XLSX file is a Microsoft Excel spreadsheet which has pre-processed the data in the CSV and organized and formatted it for convenience. You should examine both files and become familiar with their content. You can use the CSV file to derive information and customize it in a way that suits you. CSV File -------- The first line of the CSV file provides titles for each semi-colon delimited field in all the remaining records except for the last line of the file which contains the "last updated" date. XLSX File --------- The Excel spreadsheet (XLSX file) content is derived from the CSV file. Each row in column 1 contains an assembler macro, and subsequent columns identify headers or other macros that should be evaluated to see if companion updates are needed to correspond to a change in the assembler macro.