Font::TTF::OTTags(3) Utilities for TrueType/OpenType tags


use Font::TTF::OTTags qw( %tttags %ttnames %iso639 readtagsfile );

# Look at built-in stuff:
$script_tag = $tttags{'SCRIPT'}{'Cypriot Syllabary'}; # returns 'cprt'
$lang_name = $ttnames{'LANGUAGE'}{'ALT '}; # returns 'Altai'

# Map iso639-2 tag to/from OT lang tag
@isotags = $iso639{'ALT '}; # returns [ 'atv', 'alt' ]
$lang_tag = $iso639{'atv'}; # returns 'ALT '

# Read latest tags file to add to built-in definitions
readtagsfile ("C:\\Program Files\\Microsoft VOLT\\TAGS.txt");

First-level keys to %tttags and %ttnames are:

retrieve script tag or name
retrieve language tag or name
retrieve feature tag or name

Built-in data has been derived from the 2014-07-11 draft of the 3rd edition of ISO/IEC 14496-22 (Information technology - Coding of audio-visual objects - Part 22: Open Font Format) which, when finalized and approved, will replace the second edition (ISO/IEC 14496-22:2009).


readtagsfile ( filename )

Read a file in the syntax of Tags.txt (included with Microsoft VOLT) to obtain additional/replacement tag definitions.

Returns 0 if cannot open the file; else 1.


Bob Hallissy. <>.


Copyright (c) 1998-2014, SIL International (

This module is released under the terms of the Artistic License 2.0. For details, see the full text of the license in the file LICENSE.