Image::ExifTool::BuildTagLookup - Build ExifTool tag lookup tables

       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 is used to generate the tag lookup tables in Image::ExifTool::TagLookup.pm and tag name
       documentation in Image::ExifTool::TagNames.pod, as well as HTML tag name documentation.  It is used
       before each new ExifTool release to update the lookup tables and documentation, but it is not used
       otherwise.  It also performs some validation and consistency checks on the tag tables.

       PRESERVE_DATE
           Flag to preserve "Last revised" date in HTML files.  Set before calling WriteTagNames().

       COUNT
           Reference  to  hash  containing  counting  statistics.  Keys are the descriptions, and values are the
           numerical counts.  Valid after BuildTagLookup object is created, but additional statistics are  added
           by WriteTagNames().

       WRITE_PSEUDO
           Returned list of writable pseudo tags.

       Image::ExifTool::BuildTagLookup - Build ExifTool tag lookup tables

Image::ExifTool(3pm), Image::ExifTool::TagLookup(3pm), Image::ExifTool::TagNames(3pm)

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

         use Image::ExifTool::BuildTagLookup;

         $builder = Image::ExifTool::BuildTagLookup->new;

         # update Image::ExifTool::TagLookup
         $ok = $builder->WriteTagLookup('lib/Image/ExifTool/TagLookup.pm');

         # update the tag name documentation
         $ok = $builder->WriteTagNames('lib/Image/ExifTool/TagNames.pod','html');

         # print some statistics
         my $count = $$builder{COUNT};
         foreach (sort keys %$count) {
             printf "%5d %s\n", $$count{$_}, $_;
         }