ColumnRef 

Reference to a column defined in an external column set or code list.

Element Information

Model

Annotation{0,1} , CanonicalUri{0,1} , CanonicalVersionUri , LocationUri*
Children: Annotation, CanonicalUri, CanonicalVersionUri, LocationUri

Attributes

QName Type Fixed Default Use Inheritable Annotation
ExternalRef xsd:token required 
Unique ID of the resource within the external document.
Id xsd:ID required 
Unique ID within the document for the resource.
Use UseType required 
Whether the resource is required or optional.

Source 

<xsd:element name="ColumnRef" type="ColumnRef">
  <xsd:annotation>
    <xsd:documentation>Reference to a column defined in an external column set or code list.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

Sample

key

< ColumnRef Ref = "Code" />