<xsd:schema
   targetNamespace="http://www.opengis.net/fes/2.0"
   xmlns:fes="http://www.opengis.net/fes/2.0"
   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   elementFormDefault="qualified"
   version="2.0.3">

   <xsd:annotation>
      <xsd:documentation>
         Filter Encoding is an OGC Standard.
         Copyright (c) 2010, 2014 Open Geospatial Consortium.
         To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ .
      </xsd:documentation>
   </xsd:annotation>

   <xsd:include schemaLocation="filterAll.xsd"/>
   <xsd:include schemaLocation="query.xsd"/>
   <xsd:include schemaLocation="expr.xsd"/>

   <!-- ============================================= -->
   <!-- SORTBY EXPRESSION                             -->
   <!-- ============================================= -->
   <xsd:element name="SortBy"
                type="fes:SortByType"
                substitutionGroup="fes:AbstractSortingClause"/>

   <!-- ============================================= -->
   <!-- COMPLEX TYPES                                 -->
   <!-- ============================================= -->
   <xsd:complexType name="SortByType">
      <xsd:sequence>
         <xsd:element name="SortProperty"
                      type="fes:SortPropertyType" maxOccurs="unbounded"/>
      </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="SortPropertyType">
      <xsd:sequence>
         <xsd:element ref="fes:ValueReference"/>
         <xsd:element name="SortOrder" type="fes:SortOrderType" minOccurs="0"/>
      </xsd:sequence>
   </xsd:complexType>
   <xsd:simpleType name="SortOrderType">
      <xsd:restriction base="xsd:string">
         <xsd:enumeration value="DESC"/>
         <xsd:enumeration value="ASC"/>
      </xsd:restriction>
   </xsd:simpleType>
</xsd:schema>

• SortByType
• SortPropertyType

• SortBy

• SortOrderType