E Appendix E: Aids to Web Fonts implementation

Contents

Meaning of the Panose Digits
Deducing Unicode Ranges for TrueType

This appendix is informative.

E.1 Meaning of the Panose Digits

For further details on Panose-1, see [PANOSE].

Family

Serif Style

Any (0)
No Fit (1)
Cove (2)
Obtuse Cove (3)
Square Cove (4)
Obtuse Square Cove (5)
Square (6)
Thin (7)
Bone (8)
Exaggerated (9)
Triangle (10)
Normal Sans (11)
Obtuse Sans (12)
Perp Sans (13)
Flared (14)
Rounded (15)

Weight

Any (0)
No Fit (1)
Very Light (2)[100]
Light (3) [200]
Thin (4) [300]
Book (5) [400] same as CSS1 'normal'
Medium (6) [500]
Demi (7) [600]
Bold (8) [700] same as CSS1 'bold'
Heavy (9) [800]
Black (10) [900]
Extra Black / Nord (11) [900] force mapping to CSS1 100-900 scale

Proportion

Any (0)
No Fit (1)
Old Style (2)
Modern (3)
Even Width (4)
Expanded (5)
Condensed (6)
Very Expanded (7)
Very Condensed (8)
Monospaced (9)

Contrast

Any (0)
No Fit (1)
None (2)
Very Low (3)
Low (4)
Medium Low (5)
Medium (6)
Medium High (7)
High (8)
Very High (9)

Stroke Variation

Any (0)
No Fit (1)
No Variation (2)
Gradual/Diagonal (3)
Gradual/Transitional (4)
Gradual/Vertical (5)
Gradual/Horizontal (6)
Rapid/Vertical (7)
Rapid/Horizontal (8)
Instant/Horizontal (9)
Instant/Vertical (10)

Arm Style

Any (0)
No Fit (1)
Straight Arms/Horizontal (2)
Straight Arms/Wedge (3)
Straight Arms/Vertical (4)
Straight Arms/Single Serif (5)
Straight Arms/Double Serif (6)
Non-Straight Arms/Horizontal (7)
Non-Straight Arms/Wedge (8)
Non-Straight Arms/Vertical 90)
Non-Straight Arms/Single Serif (10)
Non-Straight Arms/Double Serif (11)

Letterform

Any (0)
No Fit (1)
Normal/Contact (2)
Normal/Weighted (3)
Normal/Boxed (4)
Normal/Flattened (5)
Normal/Rounded (6)
Normal/Off Center (7)
Normal/Square (8)
Oblique/Contact (9)
Oblique/Weighted (10)
Oblique/Boxed (11)
Oblique/Flattened (12)
Oblique/Rounded (13)
Oblique/Off Center (14)
Oblique/Square (15)

Midline

Any (0)
No Fit (1)
Standard/Trimmed (2)
Standard/Pointed (3)
Standard/Serifed (4)
High/Trimmed (5)
High/Pointed (6)
High/Serifed (7)
Constant/Trimmed (8)
Constant/Pointed (9)
Constant/Serifed (10)
Low/Trimmed (11)
Low/Pointed (12)
Low/Serifed (13)

XHeight

Any (0)
No Fit (1)
Constant/Small (2)
Constant/Standard (3)
Constant/Large (4)
Ducking/Small (5)
Ducking/Standard (6)
Ducking/Large (7)

E.2 Deducing Unicode Ranges for TrueType

This information is available in the font by looking at the 'ulUnicodeRange' bits in the 'OS/2' table (if it has one), which holds a bitfield representation of the set. This table is defined in revision 1.66 of the TrueType specification, from Microsoft. Considering this information as a set, each element corresponds to a Unicode 1.1 character block, and the presence of that element in the set indicates that the font has one or more glyph representations to represent at least one character in that block. The set has 128 elements as described below. The order generally follows that in the Unicode 1.1 standard. This table may be used to convert the information in a TrueType font into a CSS 'unicode-range' descriptor.


Block	Add	Block name	Unicode range

0	1	Basic Latin	U+0-7F
1	2	Latin-1 Supplement	U+80-FF
2	4	Latin-1 Extended-A	U+100-17F
3	8	Latin Extended-B	U+180-24F

4	1	IPA Extensions	U+250-2AF
5	2	Spacing Modifier Letters	U+2B0-2FF
6	4	Combining Diacritical Marks	U+300-36F
7	8	Greek	U+370-3CF

8	1	Greek Symbols and Coptic	U+3D0-3EF
9	2	Cyrillic	U+400-4FF
10	4	Armenian	U+530-58F
11	8	Hebrew	U+590-5FF

12	1	Hebrew Extended-A Hebrew Extended-B	?? what ranges ??
13	2	Arabic	U+600-69F
14	4	Arabic Extended	U+670-6FF
15	8	Devanagari	U+900-97F

16	1	Bengali	U+980-9FF
17	2	Gurmukhi	U+A00-A7F
18	4	Gujarati	U+A80-AFF
19	8	Oriya	U+B00-B7F

20	1	Tamil	U+B80-BFF
21	2	Telugu	U+C00-C7F
22	4	Kannada	U+C80-CFF
23	8	Malayalam	U+D00-D7F

24	1	Thai	U+E00-E7F
25	2	Lao	U+E80-EFF
26	4	Georgian	U+10A0-10EF
27	8	Georgian Extended	U+10F0-10FF ??

28	1	Hangul Jamo	U+1100-11FF
29	2	Latin Extended Additional	-
30	4	Greek Extended	U+1F00-1FFF
31	8	General Punctuation	U+2000-206F

32	1	Superscripts and Subscripts	-
33	2	Currency Symbols	U+20A0-20CF
34	4	Combining Marks for Symbols	U+20D0-20FF
35	8	Letterlike Symbols	U+2100-214F

36	1	Number Forms	U+2150-218F
37	2	Arrows	U+2190-21FF
38	4	Mathematical Operators	U+2200-22FF
39	8	Miscellaneous Technical	U+2300-23FF

40	1	Control Pictures	U+2400-243F
41	2	Optical Character Recognition	U+2440-245F
42	4	Enclosed Alphanumerics	U+2460-24FF
43	8	Box Drawing	U+2500-257F

44	1	Block Elements	U+2580-259F
45	2	Geometric Shapes	U+25A0-25FF
46	4	Miscellaneous Symbols	U+2600-26FF
47	8	Dingbats	U+2700-27BF

48	1	CJK Symbols and Punctuation	U+3000-303F
49	2	Hiragana	U+3040-309F
50	4	Katakana	U+30A0-30FF
51	8	Bopomofo	U+3100-312F

52	1	Hangul Compatibility Jamo	U+3130-318F
53	2	CJK Miscellaneous	??
54	4	Enclosed CJK Letters and Months	U+3200-32FF
55	8	CJK compatibility	U+3300-33FF

56	1	Hangul	U+AC00-D7FF
59	8	CJK Unified Ideographs	U+4E00-9FFF

60	1	Private Use Area	U+E000-F8FF
61	2	CJK Compatibility Ideographs	U+F900-FAFF
62	4	Alphabetic Presentation Forms	U+FB00-FB4F
63	8	Arabic Presentation Forms-A	U+FB50-FDFF

64	1	Combining Half Marks	U+FE20-FE2F
65	2	CJK compatibility Forms	U+FE30-FE4F
66	4	Small Form Variants	U+FE50-FE6F
67	8	Arabic Presentation Forms-B	U+FE70-FEFF

68	1	Halfwidth and Fullwidth Forms	U+FF00-FFEF
69	2	Specials	U+FFF0-FFFD

The TrueType bitfield system has the problem that it is tied to Unicode 1.1 and is unable to cope with Unicode expansion - it is unable to represent Tibetan for example.