<xs:group name="predicates">
  <xs:annotation>
    <xs:documentation xml:lang="en">Predicates. this group is used for documentation only, not used in XML file.</xs:documentation>
  </xs:annotation>
  <xs:all>
    <xs:element ref="predicate"/>
    <xs:element ref="comparison_predicate"/>
    <xs:element ref="between_predicate"/>
    <xs:element ref="in_predicate"/>
    <xs:element ref="like_predicate"/>
    <xs:element ref="similar_predicate"/>
    <xs:element ref="regex_like_predicate"/>
    <xs:element ref="null_predicate"/>
    <xs:element ref="quantified_comparison_predicate"/>
    <xs:element ref="exists_predicate"/>
    <xs:element ref="unique_predicate"/>
    <xs:element ref="normalized_predicate"/>
    <xs:element ref="match_predicate"/>
    <xs:element ref="overlaps_predicate"/>
    <xs:element ref="distinct_predicate"/>
    <xs:element ref="member_predicate"/>
    <xs:element ref="submultiset_predicate"/>
    <xs:element ref="set_predicate"/>
    <xs:element ref="type_predicate"/>
    <xs:element ref="search_condition"/>
  </xs:all>
</xs:group>