<xsd:attribute name="usb-2" use="required" type="longHexNumberType">
<xsd:annotation>
<xsd:documentation>Provides the third 32 bits of the 128-bit Unicode subset bitfield (USB). Each bit, except the two most significant bits, represents a single subrange. The most significant bit is always 1 and identifies the bitfield as a font signature. The second most significant bit is reserved and must be 0. Unicode subranges are numbered in accordance with the ISO 10646 standard.</xsd:documentation>
</xsd:annotation>
</xsd:attribute>
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