property reference

A property reference is a reference to a property of a complex data type by means of the property name. In the context of a given structure (e.g. within a class method or at a certain position in an access path) one may refer to any property by its name.

A property reference represents a single or complex instance or an instance collection depending on the type of the referenced property. Thus, within an operation a property reference may act e.g. as numerical operand, but also as set operand.