External Reference.When the object is serialized out as xml, its qualified name is x:externalReference.
Assembly: DocumentFormat.OpenXml (in DocumentFormat.OpenXml.dll)
[ISO/IEC 29500-1 1st Edition]
18.2.8 externalReference (External Reference)
This element defines an external reference that stores data for workbook elements.
id (Relationship Id)
Specifies a unique identifier that is used to identify a relationship to another part in the file. Relationship identifiers link the element definition with the part where data for the element is stored.
The possible values for this attribute are defined by the ST_RelationshipId simple type (§184.108.40.206).
[Note: The W3C XML Schema definition of this element’s content model (CT_ExternalReference) is located in §A.2. end note]
© ISO/IEC29500: 2008.