<!-- Padding -->
<xsd:element name="pad">
<xsd:complexType>
- <xsd:attribute name="bytes" type="xsd:integer" use="required" />
+ <xsd:attribute name="bytes" type="xsd:integer" use="optional" />
+ <xsd:attribute name="align" type="xsd:integer" use="optional" />
</xsd:complexType>
</xsd:element>