The intent of the <format/> element is to assist encapsulating
arbitrary HTML content within an mdoc(5) container. This frequently
requires having more than _one_ element within the <format/> block.
(WTF was I thinking forgetting the maxOccurs attribute?!)
<xs:element name="format">
<xs:complexType>
<xs:sequence>
- <xs:any minOccurs="0" processContents="lax" />
+ <xs:any minOccurs="0" maxOccurs="unbounded" processContents="lax" />
</xs:sequence>
<xs:attribute ref="type" />
</xs:complexType>