<xsd:group name="blockElements"><xsd:annotation><xsd:documentation><type>Group</type><name>blockElements</name><comment>The group blockElements lists all the elements that are blocks</comment></xsd:documentation></xsd:annotation><xsd:choice><xsd:group ref="ANblock"/><xsd:group ref="HTMLblock"/><xsd:element ref="foreign"/><xsd:element ref="block"/></xsd:choice></xsd:group>