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Value Mapping (Flattening) Functoid

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The Value Mapping (Flattening) functoid enables you to flatten a portion of an input instance message by converting multiple records into a single record. This is a common operation in converting Microsoft Commerce Server catalogs.

Note

The Value Mapping (Flattening) functoid should not be combined with the Looping functoid or the Table Looping functoid. If they are combined, it results in a compiled map that assumes there is no source looping dependency for the target nodes that are below the Looping or Table Looping functoid.

The following code shows a portion of a catalog listing product variants with each feature of the variant in a separate record.

<ns0:Root xmlns:ns0="http://ValueMappingFlat.ProductsIn">  
    <ProductVariant ListPrice="99.99" ID="45-01">  
        <Feature Name="Material" Value="Leather" />  
        <Feature Name="Color" Value="Black" />  
    </ProductVariant>  
    <ProductVariant ListPrice="69.99" ID="45-02">  
        <Feature Name="Material" Value="Vinyl" />  
        <Feature Name="Color" Value="Brown" />  
    </ProductVariant>  
</nso0:Root>

Flattening this portion of the catalog would convert the Feature records into attributes of the ProductVariant record.

<ns0:Root xmlns:ns0="http://ValueMappingFlat.ProductsOut">  
    <ProductVariant ListPrice="99.99" ID="45-01" Material="Leather" Color="Black" />  
    <ProductVariant ListPrice="69.99" ID="45-02" Material="Vinyl" Color="Brown" />  
</ns0:Root>

The following figure shows a map that performs this conversion.

Map source records using a functoid.
Value Mapping (Flattening) Functoid Map

The Value Mapping (Flattening) functoid returns the value of its second parameter if its first parameter is true. In this map, the first Equal functoid tests to see if the Name attribute is equal to "Material". If the attribute is equal to "Material", the Equal functoid returns True. In turn, this causes the Value Mapping (Flattening) functoid to assign the value of the Value attribute to the field in the output message.

See Also

How to Add Value Mapping (Flattening) Functoids to a Map
Flat Schema to Catalog
Advanced Functoids