<xsd:group ref="expression" minOccurs="1" maxOccurs="1" />
<xsd:choice>
<!-- bitcase expression - bit test -->
- <xsd:element name="bitcase" type="caseexpr" minOccurs="1" maxOccurs="unbounded" />
+ <xsd:element name="bitcase" type="caseexpr" minOccurs="0" maxOccurs="unbounded" />
+ <!-- case expression - value test -->
+ <xsd:element name="case" type="caseexpr" minOccurs="0" maxOccurs="unbounded" />
</xsd:choice>
<!-- default: -->
<xsd:group ref="fields" minOccurs="0" maxOccurs="1" />