Format
TrueType Font
Summary
- Name
- TrueType Font
- Identifiers
-
- MIME: font/ttf
- PUID: x-fmt/453
- Format type
- Font
- Disclosure
- Full
- Description
- Created by Apple, TrueType Font files are a sequence of concatenated tables (a table is a sequence of words; each table must be long aligned and padded with zeroes if necessary). The first of the tables is the font directory, a special table that facilitates access to the other tables in the font. The directory is followed by a sequence of tables containing the font data. These tables can appear in any order. Certain tables are required for all fonts. Others are optional depending upon the functionality expected of a particular font. The tables have names known as tags. Tags have the type uint32. Currently defined tag names consist of four characters. Tag names with less than four characters have trailing spaces. When tag names are shown in text they are enclosed in straight quotes. Tables that are required must appear in any valid TrueType font file. Also notable is that Apple makes a distinction between a "TrueType font" (which refers to a particular font outline definition technology) and an "sfnt-housed font," which refers to any font which uses the same packaging format as a TrueType font: that is, it uses the same directory structure and the same table format and meaning for any tables present.
- File extensions
-
ttf - Source
- The National Archives and Records Administration / The National Archives and Records Administration
- Developed by
- Apple Computer, Inc.
- Supported by
- Apple Computer, Inc.
Relationships
- Has lower priority than
-
- Acrobat PDF 1.0 - Portable Document Format 1.0
- Acrobat PDF 1.1 - Portable Document Format 1.1
- Acrobat PDF 1.2 - Portable Document Format 1.2
- Acrobat PDF 1.3 - Portable Document Format 1.3
- Acrobat PDF 1.4 - Portable Document Format 1.4
- Acrobat PDF 1.5 - Portable Document Format 1.5
- Acrobat PDF 1.6 - Portable Document Format 1.6
- Acrobat PDF/A - Portable Document Format 1a
- Acrobat PDF/X - Portable Document Format - Exchange 1:1999
- Acrobat PDF/X - Portable Document Format - Exchange 1:2001
- Acrobat PDF/X - Portable Document Format - Exchange 1a:2003
- Acrobat PDF/X - Portable Document Format - Exchange 2:2003
- Acrobat PDF/X - Portable Document Format - Exchange 3:2003
- Acrobat PDF/X - Portable Document Format - Exchange 1a:2001
- Acrobat PDF/X - Portable Document Format - Exchange 3:2002
- Acrobat PDF 1.7 - Portable Document Format 1.7
- Acrobat PDF/A - Portable Document Format 1b
- Acrobat PDF/A - Portable Document Format 2a
- Acrobat PDF/A - Portable Document Format 2b
- Acrobat PDF/A - Portable Document Format 2u
- Acrobat PDF/A - Portable Document Format 3a
- Acrobat PDF/A - Portable Document Format 3b
- Acrobat PDF/A - Portable Document Format 3u
- Acrobat PDF/X - Portable Document Format - Exchange PDF/X-4
- Acrobat PDF/X - Portable Document Format - Exchange PDF/X-4p
- Acrobat PDF/X - Portable Document Format - Exchange PDF/X-5g
- Acrobat PDF/X - Portable Document Format - Exchange PDF/X-5pg
- Acrobat PDF/X - Portable Document Format - Exchange PDF/X-5n
- Acrobat PDF/E - Portable Document Format for Engineering PDF/E-1
- Web Open Font Format 1.0
Internal signatures
TrueType Font
- Note
- OS/2, cmap (character to glyph mapping), glyf (glyph data), head(font header), hhea (horizontal header), hmtx (horizontal metrics), loca (index to location), maxp (maximum profile),name (naming table), post (PostScript information)
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 12
- Max offset
- 128
- Byte Sequence
4F532F32{0-256}636D6170{0-256}676C7966{0-256}68656164{0-256}68686561{0-256}686D7478{0-256}6C6F6361{0-256}6D617870{0-256}6E616D65{0-256}706F7374- Endianness
- Little-endian
Changelog
-
Updated in V94
- Release date
- 17 September 2018
TrueType Font: Amended Media Type from incorrect application/octet-stream to font/tff. Added format classification 'Font'.
-
Updated in V67
- Release date
- 26 February 2013
TrueType Font: Improved signature through PRONOM Research.
-
Updated in V62
- Release date
- 28 August 2012
True Type Font: Description information submitted by the National Archives and Records Administration.
-
Updated in V60
- Release date
- 11 June 2012
TrueType Font: Existing signature refined through PRONOM Research.