# phpman > perldoc > Image::ExifTool::TagLookup

## NAME
    [Image::ExifTool::TagLookup](https://www.chedong.com/phpMan.php/perldoc/Image%3A%3AExifTool%3A%3ATagLookup/markdown) - Fast lookup for ExifTool tags

## SYNOPSIS
    This module is required by [Image::ExifTool](https://www.chedong.com/phpMan.php/perldoc/Image%3A%3AExifTool/markdown) for writing tags.

## DESCRIPTION
    Provides a fast, case insensitive lookup for tag names.

## AUTHOR
    Copyright 2003-2022, 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.

## SEE ALSO
    Image::[ExifTool(3pm)](https://www.chedong.com/phpMan.php/man/ExifTool/3pm/markdown), [Image::ExifTool](https://www.chedong.com/phpMan.php/perldoc/Image%3A%3AExifTool/markdown)::[BuildTagLookup(3pm)](https://www.chedong.com/phpMan.php/man/BuildTagLookup/3pm/markdown), [Image::ExifTool](https://www.chedong.com/phpMan.php/perldoc/Image%3A%3AExifTool/markdown)::[TagNames(3pm)](https://www.chedong.com/phpMan.php/man/TagNames/3pm/markdown)