XML Tutorial/XML Schema/hexBinary
The hexBinary datatype represents hex-encoded binary data
<!-- schema -->
<xsd:element name="hex1" type="xsd:hexBinary"/>
<!-- instance document -->
<hex1>FFCC9E</hex1>
<!-- schema -->
<xsd:element name="hex1" type="xsd:hexBinary"/>
<!-- instance document -->
<hex1>FFCC9E</hex1>