lowl:intersectionOf [class-expression]+
na class for which the
class extension contains precisely those individuals that are members of the
class extension of all class descriptions in the list.
lowl:unionOf [class-expression]+
nan anonymous class
for which the class extension contains those individuals that occur in at
least one of the class extensions of the class descriptions in the list
lowl:complementOf class-expression
na class for which the
class extension contains exactly those individuals that do not belong to the
class extension of the class description that is the object of the statement
n
<complementOf>
<Class>
<unionOf
parseType="owl:collection">
<Class
rdf:resource="#meat"/>
<Class
rdf:resource="#fish"/>
</unionOf>
</Class>
</complementOf>