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: Consider the following information stored for a single font:

<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

end example]

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: Consider font information specified as follows:

<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

end example]

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: Consider font information specified as follows:

<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. end example]

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: Consider font information specified as follows:

<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

end example]

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: Consider font information specified as follows:

<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

end example]

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: Consider font information specified as follows:

<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

end example]

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: Consider font information specified as follows:

<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. end example]

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>