Documentation for Standards for Technology in Automotive Retail
Definition Type: Element
Name: Expression
Namespace: http://www.starstandard.org/STAR/5
Type: star:ExpressionType
Containing Schema: Meta.xsd
Abstract
Documentation:
Expression identifies the content that is to be returned, given query success. In essence, the expression here has the effect of filtering the part(s) of the found element(s) that are to be returned. ReturnCriteria plays no role in the query itself. That is handled as a match against the request BOD's noun exemplar. ReturnCriteria allows the sender of the BOD to indicate which information (down to the field level) is requested to be returned, given that the query has been successful in matching the exemplar to existing nouns. That is, in a GetListPurchaseOrder, if one or more PurchaseOrders with a TotalPrice = $1M were found, ReturnCriteria tells the BOD recipient which parts of the PurchaseOrder should be populated with content when the response (ShowPurchaseOrder) is formulated. The expressionLanguage indicates the expression language being used. In order for the ReturnCriteria expression to be evaluable by the BOD recipient, the recipient must be capable of processing and interpreting the specified expression language. XPath is the default, due to its ubiquity among XML processing technologies.
Collapse XSD Schema Diagram:
Drilldown into expressionLanguage in schema meta_xsd Drilldown into ExpressionType in schema meta_xsdXSD Diagram of Expression in schema meta_xsd (Standards for Technology in Automotive Retail)
Collapse XSD Schema Code: 
<xsd:element name="Expression" type="ExpressionType">
    <xsd:annotation>
        <xsd:documentation>Expression identifies the content that is to be returned, given query success. In essence,
            the expression here has the effect of filtering the part(s) of the found element(s) that are to be returned.
            ReturnCriteria plays no role in the query itself. That is handled as a match against the request BOD's noun
            exemplar. ReturnCriteria allows the sender of the BOD to indicate which information (down to the field
            level) is requested to be returned, given that the query has been successful in matching the exemplar to
            existing nouns. That is, in a GetListPurchaseOrder, if one or more PurchaseOrders with a TotalPrice = $1M
            were found, ReturnCriteria tells the BOD recipient which parts of the PurchaseOrder should be populated with
            content when the response (ShowPurchaseOrder) is formulated. The expressionLanguage indicates the expression
            language being used. In order for the ReturnCriteria expression to be evaluable by the BOD recipient, the
            recipient must be capable of processing and interpreting the specified expression language. XPath is the
            default, due to its ubiquity among XML processing technologies.</xsd:documentation>
    </xsd:annotation>
</xsd:element>
Collapse Child Attributes:
Name Type Default Value Use
expressionLanguage star:expressionLanguage Optional
Collapse Derivation Tree:
Documentation for Standards for Technology in Automotive Retail

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