<xs:element name="let"> <xs:complexType> <xs:attribute name="name" type="NonEmptyString" use="required"/> <xs:attribute name="value" type="NonEmptyString" use="required"/> </xs:complexType> </xs:element>
<xs:attribute name="name" type="NonEmptyString" use="required"/>
<xs:attribute name="value" type="NonEmptyString" use="required"/>