<sig> (Supported Unicode Subranges and Code Pages)

This element specifies information identifying the code pages and Unicode subranges for which the parent font provides glyphs. This information may be used as defined in font substitution logic to locate an appropriate substitute font when this font is not available. This information is determined by querying the font when present and shall not be modified when the font is not available.

When storing Unicode subrange information, the appropriate bit in the bitfield shall only be set if the entire subrange is supported by that font.

If this element is omitted, then no supported code page/Unicode subrange information is available.

example: 
<w:font w:name="Times New Roman">
  <w:sig w:usb0="20002A87" w:usb1="80000000" w:usb2="00000008" w:usb3="00000000" w:csb0="000001FF" w:csb1="00000000" />
  …
</w:font>

The <sig> element specifies the supported code pages and Unicode sub ranges via its attributes. For example, the code pages supported are:

  • Latin 1

  • Latin 2: Eastern Europe

  • Cyrillic

  • Greek

  • Turkish

  • Baltic

Parent Elements

<font> (§2.8.2.10)

Attributes

Description

<csb0> (Lower 32 Bits of Code Page Bit Field)

Specifies a four digit hexadecimal encoding of the first 32 bits of the 64-bit code-page bit field that identifies which specific character sets or code pages are supported by the parent font.

Each bit in this 32 bits represents the following code page:

Bit

Description

0

Latin 1

1

Latin 2: Eastern Europe

2

Cyrillic

3

Greek

4

Turkish

5

Hebrew

6

Arabic

7

Windows Baltic

8 to 16

Reserved for Alternate ANSI

17

Thai

18

JIS/Japan

19

Chinese (Simplified)

20

Korean Wansung

21

Chinese (Traditional)

22 to 29

Reserved for Alternate ANSI and OEM

30

Macintosh Character Set (Standard Roman)

31

Symbol Character Set

example: 
<w:font w:name="Lucida Console">
  <w:sig w:csb0="0000001F" … />
  …
</w:font>

The @csb0 attribute value of 0000001F specifies that the following code pages are supported by this font:

  • Latin 1

  • Latin 2: Eastern Europe

  • Cyrillic

  • Greek

  • Turkish

The possible values for this attribute are defined by the ST_LongHexNumber simple type (§2.18.57).

<csb1> (Upper 32 Bits of Code Page Bit Field)

Specifies a four digit hexadecimal encoding of the upper 32 bits of the 64-bit code-page bit field that identifies which specific character sets or code pages are supported by the parent font.

Each bit in this 32 bits represents the following code page:

Bit

Description

0 to 15

Reserved for OEM

16

IBM Greek

17

MS-DOS Russian

18

MS-DOS Nordic

19

Arabic

20

MS-DOS Canadian French

21

Hebrew

22

MS-DOS Icelandic

23

MS-DOS Portuguese

24

IBM Turkish

25

IBM Cyrillic

26

Latin 2

27

MS-DOS Baltic

28

Greek (former 437G)

29

Arabic (AMSO 708)

30

WE/Latin 1

31

US

example: 
<w:font w:name="Lucida Console">
  <w:sig w:csb1="00000000" … />
  …
</w:font>

The @csb1 attribute value of 00000000 specifies that none of the specified code pages are supported by this font. ]

The possible values for this attribute are defined by the ST_LongHexNumber simple type (§2.18.57).

<usb0> (First 32 Bits of Unicode Subset Bitfield)

Specifies the first 32 bits of the 128-bit Unicode subset bit field (USB). Subranges are ordered in accordance with the ISO 10646 standard.

example: 
<w:font w:name="Times New Roman">
  <w:sig w:usb0="20002A87" … />
  …
</w:font>

The @usb0 attribute value of 20002A87 specifies that the first 32 bits of the bitfield are 00100000000000000010101010000111, which corresponds to:

  • Basic Latin

  • Latin-1 Supplement

  • Latin Extended-A

  • Basic Greek

  • Cyrillic

  • Basic Hebrew

  • Basic Arabic

  • Latin Extended Additional

The possible values for this attribute are defined by the ST_LongHexNumber simple type (§2.18.57).

<usb1> (Second 32 Bits of Unicode Subset Bitfield)

Specifies the second 32 bits of the 128-bit Unicode subset bit field (USB). Subranges are ordered in accordance with the ISO 10646 standard.

example: 
<w:font w:name="Times New Roman">
  <w:sig w:usb1="80000000" … />
  …
</w:font>

The @usb0 attribute value of 80000000 specifies that the first 32 bits of the bitfield are 10000000000000000000000000000000, which corresponds to:

  • Arabic Presentation Forms-A

The possible values for this attribute are defined by the ST_LongHexNumber simple type (§2.18.57).

<usb2> (Third 32 Bits of Unicode Subset Bitfield)

Specifies the third 32 bits of the 128-bit Unicode subset bit field (USB). Subranges are ordered in accordance with the ISO 10646 standard.

example: 
<w:font w:name="Times New Roman">
  <w:sig w:usb2="00000008" … />
  …
</w:font>

The @usb0 attribute value of 80000000 specifies that the first 32 bits of the bitfield are 00000000000000000000000000001000, which corresponds to:

  • Arabic Presentation Forms-B

The possible values for this attribute are defined by the ST_LongHexNumber simple type (§2.18.57).

<usb3> (Fourth 32 Bits of Unicode Subset Bitfield)

Specifies the fourth 32 bits of the 128-bit Unicode subset bit field (USB). Subranges are ordered in accordance with the ISO 10646 standard.

example: 
<w:font w:name="Times New Roman">
  <w:sig w:usb3="00000000" … />
  …
</w:font>

The @usb3 attribute value of 00000000 specifies that the first 32 bits of the bitfield are 00000000000000000000000000000000, which corresponds to no subranges. ]

The possible values for this attribute are defined by the ST_LongHexNumber simple type (§2.18.57).

The following XML Schema fragment defines the contents of this element:

<complexType name="CT_FontSig">
	<attribute name="usb0" use="required" type="ST_LongHexNumber"/>
	<attribute name="usb1" use="required" type="ST_LongHexNumber"/>
	<attribute name="usb2" use="required" type="ST_LongHexNumber"/>
	<attribute name="usb3" use="required" type="ST_LongHexNumber"/>
	<attribute name="csb0" use="required" type="ST_LongHexNumber"/>
	<attribute name="csb1" use="required" type="ST_LongHexNumber"/>
</complexType>