Biml Language Reference
PropertyExpression Element
The AstPropertyExpressionNode type provides the ability to map a SQL Server Integration Services expression value onto a property.
  Attribute API Type Default Description
ExternalProperty String
Used if a PropertyName is not defined as a referenceable item in BIML. The text here will be passed directly into the target without evaluation by the compiler.

[.NET API Property: ExternalProperty]

PropertyName AstPropertyNode
This value specifies a direct reference to the target property.

[.NET API Property: Property]

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]