Biml Language Reference
TableIndexLeaf Element
The AstTableIndexLeafNode corresponds directly to a column include reference from a parent table index in SQL Server.
  Attribute API Type Default Description
ColumnName AstTableColumnBaseNode
Specifies the name of the column that is being referenced.

[.NET API Property: Column]

Collection Children
  Child API Type Description
    <Annotation />
This is a collection of annotation items that can be used to specify documentation, tags, or other information. Annotations are particularly useful for storing information about nodes that can be used by BimlScript code.

[.NET API Property: Annotations]