2.51 Expression

The Expression element specifies an expression, along with an optional path by which to reach an entity whose context is used to evaluate the expression. Each expression is evaluated within the context of a specific entity called the context entity.

Exactly one of the following child elements, Expression.AttributeRef, Expression.EntityRef, Expression.Function, Expression.Literal, Expression.Null, or Expression.ParameterRef MUST be specified as a child of the Expression element.

The following are the parent elements, attributes, and child elements of the Expression element.

Parent elements
Arguments
Attribute
CalculatedAttributes
Details
Filter
Grouping
Measures
Parameter

Attributes
Expression.Name

Child elements
Expression.AttributeRef
Expression.CustomProperties
Expression.EntityRef
Expression.Function
Expression.Literal
Expression.Null
Expression.ParameterRef
Expression.Path

The following is the XML Schema definition of the Expression element.          

 <xsd:complexType name="ExpressionType">
   <xsd:all>
     <xsd:element name="Path" type="PathType" minOccurs="0" />
     <xsd:element name="Function" type="FunctionType" minOccurs="0" />
     <xsd:element name="AttributeRef" type="AttributeRefType" minOccurs="0" />
     <xsd:element name="EntityRef" type="EntityRefType" minOccurs="0" />
     <xsd:element name="ParameterRef" type="ParameterRefType" minOccurs="0" />
     <xsd:element name="Literal" type="LiteralType" minOccurs="0" />
     <xsd:element name="Null" type="NullType" minOccurs="0" />
     <xsd:element name="CustomProperties" type="CustomPropertiesType" 
                  minOccurs="0" />
   </xsd:all>
   <xsd:attribute name="Name" type="NonEmptyString" use="optional" />
 </xsd:complexType>