ability to delegate label values

[dret]

it might be useful to have the ability to delegate labels. that might work in the way that a label could be a reference instead of a value. this would mean to access a label document (probably in the same syntax) from that address, and get the label value from there. essentially, this would allow APIs to claim that labels for them are available, but to delegate the actual labels to a third party.
the best way to implement this in the format might be to say that each label is either a value, or a reference. if it is a reference, the processing model is to retrieve the actual label value from the referenced resource.