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NRSI: Computers & Writing Systems

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Short URL: http://scripts.sil.org/DoulosSIL_Technical

Doulos SIL — Documentation

NRSI staff, 2014-10-28

Note

The Doulos SIL fonts have been moved to a new web site. Please  click here for the new site.











Warning

The content below is old. Please  click here for latest fonts and FAQs on the new site.


‘Thanks. I look forward to the liberating effect of being able to type diacritics easily.’

‘Downloading this for a class on linguistics. My TAs recommended it. :)’


Table of Contents for this web page:

System requirements

The Doulos SIL font is designed to work on systems and with applications that provide support for TrueType fonts and for Unicode character encoding. This includes Microsoft Windows® 9x or greater, as well as recent versions of the Mac OS (version 9.0 and later), and also some implementations of Unix / Linux (TrueType font support on Unix and Linux may depend upon the particular applications in use). On some systems (true, at least, of 32-bit Windows), it can also be used with older applications that use legacy, industry-standard, 8-bit character encodings.

The preceding characterization of system requirements describes the minimum needed to display characters. Realizing the full capabilities of this font involves additional requirements. The first release of this font was designed to work with either of two advanced font technologies, Graphite or OpenType; beginning with release 4.0.12, it also contains AAT tables to offer selection of alternate glyphs on Mac OS X. To take advantage of the advanced typographic capabilities of this font, you must be using applications that provide an adequate level of support for Graphite and OpenType.

Features of the font

The Doulos SIL font contains near-complete coverage of all the characters defined in Unicode 7.0 for Latin and Cyrillic. In total, over 3,600 glyphs are included, providing support for over 2,300 characters as well as a large number of ligated character sequences (e.g., contour tone letters used in phonetic transcription of tonal languages).

In addition, alternately-designed glyphs are also provided for a number of characters for use in particular contexts. The glyphs are accessible in applications that support advanced font technologies, specifically the Graphite or OpenType technologies. These technologies are also utilized to provide automatic positioning of diacritics relative to base characters in arbitrary base+diacritic combinations (including combinations involving multiple diacritics).

Some important issues with respect to Unicode need to be borne in mind. Unicode is a character encoding and not a glyph encoding. Thus you should endeavor to use the character that reflects your character needs rather than finding a glyph that looks right and using its character code. Thus, for example, there is only one code for CAPITAL ENG (U+014A), although there are 4 different glyph shapes for this character in use around the world. Therefore it is necessary to use other means, such as user-selectable font features, to ensure that your document displays the right glyph for the character that you are anticipating. The advanced typographic capabilities mentioned above provide this very capability.

See also “How do I use a feature?”

Advanced typographic capabilities

This font supports various advanced typographic capabilities using the Graphite or OpenType font technologies.

  • Automatic conversion of sequences of pitch letters (U+02E5..U+02E9 and U+A712..U+A716) into ligatures.
  • Automatic fi-type ligatures.
  • Auto placement of diacritics to a sufficient level of stacking.
  • Auto placement of double-width diacritics (U+035C..U+0362) according to heights and depths of adjacent clusters (in Graphite only)
  • Vietnamese diacritic placement handling (enabled via a user-selectable font feature).

The automatic placement of diacritics is supported for data that may or may not be canonically ordered (as defined by the  Unicode Standard). This should normally be the responsibility of application software and text-processing resources (such as input methods), however, and not the user.

These capabilities are available in any application that supports the Graphite technology. They are also available via the OpenType technology, though this requires applications that provide a sufficient level of support for OpenType features. (See System Requirements.)

TypeTuner Support: Andika, Charis SIL, Doulos SIL and Gentium — a typeface for the nations all have SIL TypeTuner support. They are also all available through the online SIL TypeTuner Web.

User-selectable font features

The document below can be downloaded in order to see all the user-selectable font features that are available in the font. The feature names, feature ids, settings and examples are provided. The document was produced with  Graphite LibreOffice.

Font Features for Doulos SIL 5.000
NRSI team, 2014-10-28
Download "DoulosSIL-features5.000.pdf", Acrobat PDF document, 685KB [878 downloads]

Note

The Graphite features in this font are now handled by the CSS support in Firefox 11+.

Supported character ranges

This font supports over 2,300 characters from the Unicode 7.0 standard as well as a number of Private Use Area (PUA) characters. However, in this version of the font we have finally removed or strongly deprecated many of the PUA characters that are already in Unicode. In total, over 3,600 glyphs are included, supporting stylistic alternates for a number of characters as well as a large number of ligated sequences (e.g., contour tone letters used in phonetic transcription of tonal languages). The following character ranges constitute the list of characters supported by this font:

C0 Controls and Basic Latin U+0020..U+007E
C1 Controls and Latin-1 Supplement U+00A0..U+00FF
Latin Extended-A U+0100..U+0148, U+014A..U+017F
Latin Extended-B U+0180..U+024F
IPA Extensions U+0250..U+02AF
Spacing Modifier Letters U+02B0..U+02FF
Combining Diacritical Marks U+0300..U+0320, U+0323..U+033F, U+0346..U+036F
Greek and Coptic U+0387, U+0393..U+0394, U+0398, U+039E, U+03A0, U+03A8..U+03A9, U+03B1..U+03B4, U+03B8, U+03BB..U+03BC, U+03C0..U+03C1, U+03C3, U+03C6..U+03C7, U+03C9
Cyrillic U+0400..U+045F, U+0462..U+0463, U+0472..U+0475, U+048A..U+04FF
Cyrillic Supplementary U+0500..U+052F
Phonetic Extensions U+1D00..U+1D7F
Phonetic Extensions Supplement U+1D80..U+1DBF
Combining Diacritical Marks Supplement U+1DC2, U+1DC4..U+1DCD, U+1DFD..U+1DFF
Latin Extended Additional U+1E00..U+1EFF
General Punctuation U+2000..U+2030, U+2032..U+203A, U+203C, U+203F.. U+2041, U+2044, U+2053, U+2057, U+2060..U+2063, U+206A..U+206F
Superscripts and Subscripts U+2070..U+2071, U+2074..U+208E, U+2090..U+209C
Currency Symbols U+20A0..U+20BD
Combining Diacritical Marks for Symbols U+20E5, U+20EC..U+20EF
Letterlike Symbols U+210C, U+2113, U+2116..U+2117, U+211F, U+2122..U+2123, U+2126, U+212D, U+2135, U+214F
Number Forms U+2153..U+2189
Arrows U+2190..U+219B, U+21A8, U+21D0..U+21D5
Mathematical Operators U+2202..U+2206, U+220F, U+2211..U+2213, U+2219..U+221A, U+221E, U+2225..U+2226, U+222B, U+2234..U+2235, U+223C, U+2248, U+225F, U+2260..U+2262, U+2264..U+2265, U+U+2282..U+2287
Miscellaneous Technical U+2308..U+230B, U+231C..U+231F, U+2329..U+232A, U+239B..U+23AD
Control Pictures U+2423
Geometric Shapes U+25CA, U+25CC
Miscellaneous Symbols U+2640, U+2642, U+266D, U+266F
Dingbats U+2713, U+274D
Misc. Math. Symbols-A U+27E6..U+27E9
Latin Extended-C U+2C60..U+2C7F
Coptic U+2C88
Supplemental Punctuation U+2E00..U+2E0D, U+2E3A..U+2E3B
Modifier Tone Letters U+A700..U+A71F
Latin Extended-D U+A720..U+A78E, U+A790..U+A799, U+A7A0..U+A7AD, U+A7B0..U+A7B1, U+A7F7..U+A7FF
Latin Extended-E U+AB64..U+AB65
PUA: Specials U+F130..U+F133
PUA: Modifier letters (e.g. superscripts) U+F1A1, U+F1A3..U+F1A4, U+F1AB, U+F1AE, U+F1B4..U+F1B5, U+F1BC, U+F1CD..U+F1CE, U+F1F1..U+F1F9
PUA: Latin U+F20D, U+F234..U+F235, U+F258..U+F259, U+F267..U+F269, U+F26C..U+F26D
PUA: Cyrillic U+F326..U+F327
Alphabetic Presentation Forms U+FB00..U+FB04
Variation Selectors U+FE00..U+FE0F
Combining Half Marks U+FE20..U+FE23
Arabic Presentation Forms-B U+FEFF (zero-width no-break space)
Specials U+FFF9..U+FFFD
Mathematical Alphanumeric Symbols U+1D40C, U+1D504..U+1D505, U+1D50A, U+1D50E..U+1D510, U+1D513..U+1D514, U+1D516..U+1D517, U+1D519

Supported Character Ranges

Private-use (PUA) characters

There are a number of private-use characters that are supported in this font. These conform to SIL International’s corporate registry for usage of the Unicode private-use areas. Characters which are not yet in Unicode are shown below.

Specials

U+F130  FONT BASELINE AND SIDE-BEARING MARKER LEFT

U+F131  FONT BASELINE AND SIDE-BEARING MARKER RIGHT

U+F132  FONT VERTICAL METRICS MARKER LEFT

U+F133  FONT VERTICAL METRICS MARKER RIGHT

Modifier Letters

U+F1A1  MODIFIER LETTER SMALL AE

U+F1A3  MODIFIER LETTER SMALL REVERSED E

U+F1A4  MODIFIER LETTER SMALL CLOSED REVERSED OPEN E

U+F1AB  MODIFIER LETTER SMALL O WITH STROKE

U+F1AE  MODIFIER LETTER SMALL CAPITAL OE

U+F1B4  MODIFIER LETTER SMALL CAPITAL Y

U+F1B5  MODIFIER LETTER SMALL RAMS HORN

U+F1BC  MODIFIER LETTER SMALL H WITH STROKE

U+F1CD  MODIFIER LETTER SMALL CAPITAL U BAR

U+F1CE  MODIFIER LETTER SMALL TURNED Y

U+F1F1  MODIFIER LETTER PITCH ONE

U+F1F2  MODIFIER LETTER PITCH TWO

U+F1F3  MODIFIER LETTER PITCH THREE

U+F1F4  MODIFIER LETTER PITCH FOUR

U+F1F5  MODIFIER LETTER PITCH FIVE

U+F1F6  MODIFIER LETTER PITCH SIX

U+F1F7  MODIFIER LETTER PITCH SEVEN

U+F1F8  MODIFIER LETTER PITCH EIGHT

U+F1F9  MODIFIER LETTER PITCH NINE

Latin

U+F20D  LATIN CAPITAL LETTER D WITH STROKE AND HOOK

U+F234  LATIN CAPITAL LETTER Z WITH PALATAL HOOK

U+F235  LATIN SMALL LETTER EZH WITH PALATAL HOOK

U+F247  LATIN SMALL LETTER AT

U+F248  LATIN CAPITAL LETTER AT

U+F258  LATIN LETTER SMALL CAPITAL I OVER SMALL SCHWA

U+F259  LATIN LETTER SMALL UPSILON OVER SMALL SCHWA

U+F267  LATIN SMALL LETTER TURNED Y WITH BELT

U+F268  LATIN LETTER SMALL CAPITAL L WITH BELT

U+F269  LATIN SMALL LETTER TURNED R WITH LONG LEG AND HOOK

U+F26D LATIN SMALL LETTER B WITH LEFT HOOK

Cyrillic

U+F326  CYRILLIC CAPITAL LETTER GHE WITH STROKE AND DESCENDER

U+F327  CYRILLIC SMALL LETTER GHE WITH STROKE AND DESCENDER

Deprecated SIL Corporate PUA characters Lorna A. Priest, 2012-02-07

These PUA characters have been added to Unicode and are being deprecated. This page lists those PUA characters along with the appropriate Unicode codepoints. Please use the Unicode codepoint instead of the PUA codepoint. As of version 5.000 our SIL Unicode Roman fonts no longer support the PUA codepoint for backwards compatibility purposes.


WOFF Support

WOFF (Web Open Font Format) is a font 'wrapping' technology that is poised to become the standard for web fonts for the long-term future and has broad support, even in Internet Explorer 9. It compresses the font data, so is more efficient (and faster) than referring to hosted TrueType or OpenType fonts. It also is likely to have better long-term support. As of October 2010, WOFF fonts are supported in Firefox 3.6+, Chrome 6, Internet Explorer 9 preview versions and development versions of Safari.

All of our Roman fonts now have standard WOFF versions of our fonts that you can download and host on your server. See the download page for the DoulosSIL-5.000-web.zip version of the font.

Further information on using and testing are available here:

Conversion

In order to use this font with existing data that was created for use with fonts developed using the Encore Fonts system, or with custom-encoded fonts created by other means, it is necessary to re-type or convert data to produce data that is encoded in conformance with the Unicode Standard. TECkit is one program that can be used for character encoding conversion. TECkit allows users to write their own custom conversion mappings.

The TECkit package is available for download from SIL’s TECkit Web site.

Some TECkit mapping files have already been created for some of the more widely used SIL legacy fonts.

Many of SIL's Private Use Area codepoints are now in Unicode. All processes (input methods, mappings) that create Unicode data should be revised to generate the proper Unicode values instead of PUA codes.

If you have data that contains these PUA codes, it should be updated by replacing each PUA character with its official Unicode counterpart. This will facilitate data interchange and the use of standard fonts and software.
SIL PUA to Unicode 7.0 Mapping is provided for converting your data.

Keyboarding

The ability to obtain full benefits of this font is also dependent upon having means for Unicode character input. This package does not include keyboard input methods. Most current operating systems provide keyboard input methods for a number of different languages that have writing systems based on the Roman or Cyrillic scripts. Various means may be available for different operating-system platforms to create additional input methods for other languages. Some of these are listed here: Some tools and resources for character input.


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