Image::ExifTool::Import - Import CSV and JSON database files

       Copyright 2003-2025, Phil Harvey (philharvey66 at gmail.com)

       This  library  is  free  software;  you can redistribute it and/or modify it under the same terms as Perl
       itself.

       This module contains routines for importing tag information from CSV (Comma Separated Value) and JSON
       (JavaScript Object Notation) database files.

       Exports nothing by default, but ReadCSV and ReadJSON may be exported.

ReadCSV/ReadJSON
       Read CSV or JSON file into a database hash.

       Inputs:
           0) CSV file name or file reference.

           1) Hash reference for database object.

           2) Optional string used to represent an undefined (missing) tag value.  (Used for deleting tags.)

           3) For ReadCSV this gives the delimiter for CSV entries, with a default of ",".  For ReadJSON this is
           the  character set for converting Unicode escape sequences in strings, with a default of "UTF8".  See
           the ExifTool Charset option for a list of valid character sets.

       Return Value:
           These functions return an error string, or undef on success  and  populate  the  database  hash  with
           entries  from  the  CSV or JSON file.  Entries are keyed based on the SourceFile column of the CSV or
           JSON information, and are stored as hash lookups of tag name/value for each SourceFile.  The order of
           the keys (CSV column order or order in a JSON object) is stored as an ARRAY reference  in  a  special
           "_ordered_keys_" element of this hash.

       Image::ExifTool::Import - Import CSV and JSON database files

Image::ExifTool(3pm)

perl v5.40.1                                       2025-03-16                       Image::ExifTool::Import(3pm)

           use Image::ExifTool::Import qw(ReadCSV ReadJSON);

           $err = ReadCSV($csvFile, \%database);

           $err = ReadJSON($jsonfile, \%database);