XML/XML Schema/hexBinary

Set the max length of xs:hexBinary

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://www.wbex.ru" xmlns="http://www.wbex.ru"
  elementFormDefault="qualified">
  <xs:element name="data" type="binaryImage"/>

  <xs:simpleType name="binaryImage">
    <xs:restriction base="xs:hexBinary">
      <xs:maxLength value="1024" />
    </xs:restriction>
  </xs:simpleType>
</xs:schema>