The only way to change datarecords is changing the Filemaker-EMDoku1
For changing datarecords the EMDoku-System provide a Feedback-Function;
please mention the Feedback description here
basic source for Data-Import should be a plain textfile, datafields separated by tab, each new datarecord start with LF, text coding UTF8 with Unix-LF; please use always the same field order
Also possible for Import Metadata is a FileMaker Pro File (Version 12 up to 21) or Excel 95 (.xls) / Excel xml (.xlsx)