XML Tutorial/XML Schema/byte

The byte data type is derived from the short type.

The value space is integer values from ?8 up to and including 127. 
The lexical space is a finite-length sequence of decimal digits with an optional leading - or +.
<!-- schema -->
<xsd:complexType name="myBytes">
  <xsd:choice>
   <xsd:element name="byte1" type="xsd:byte"/>
   <xsd:element name="byte2" type="xsd:byte"/>
   <xsd:element name="byte3" type="xsd:byte"/>
  </xsd:choice>
</xsd:complexType>
<!-- instance document -->
<byte2>55</byte2>