Express ID of the referencing entity in the source model.
The raw Location string as authored in the file.
OptionaltargetThe target entity address, when the location carried a #expressID.
The location resolved to an absolute URI against the source model URI.
An outbound federation link discovered from a cross-reference: the referencing entity in this model, the raw location it declared, and — once resolved against the model's own URI — the absolute URI (and, if the location carried a
#expressIDfragment, the entity address) it points at.