OptionalcacheDirectory to cache parsed tag descriptions. Descriptions are only cached
on disk if this is set; otherwise every process runs exiftool -listx on
its first load.
Only this application's user should be able to write to this directory: anyone who can write here can replace the descriptions this class returns.
OptionaldisableIf true, disables disk caching even if cacheDir is set. Defaults to false.
OptionallanguageLanguage code for descriptions (e.g., 'en', 'de', 'zh_cn'), as ExifTool
writes it in -listx output: note the underscore, not zh-cn. The
constructor throws for any other form, as the code is part of the cache
filename. Defaults to 'en'.
Options for configuring TagDescriptions behavior.