[VCARDDAV] Confusion regarding the correct use of FN, N and NICKNAME in RFC6350 with regards to nicknames and honorifics

[Gesh hseG <[e-mail]>]

Hello.
The correct usage of FN/N/NICKNAME in the following scenario is unclear to
me:
Suppose I have an acquaintance who is either more or less close to me than
the average acquaintance,
thus leading to my referring to them using a nickname or honorific,
respectively.
Then it appears that in a vCard referring to them, I should specify their
full name in FN,
their name broken down into components in N, and the name by which I refer
to them in NICKNAME.
In addition, assuming I wish for this person to be sorted by the referring
name, I should set the SORT-AS
parameter of N to the value of NICKNAME.
Thus:
FN:Mr. John Joe Doe\, MSc
N;SORT-AS="Dad":Doe;John;Joe;Mr.;MSc
NICKNAME:Dad

FN:Lady Jane Dale
N;SORT-AS="Lady Dale":Dale;Jane;;Lady;
NICKNAME:Lady Dale

FN:Jeff Lebowski
N;SORT-AS="The Dude":Lebowski;Jeff;;;
NICKNAME:The Dude

However, this reading means the property names do not reflect their use
(FN, N, and NICKNAME should
instead be called Full Name, Name Components, Common Name, respectively),
and causes the duplication
of data (the value of SORT-AS and NICKNAME is duplicated).
In addition, it is unclear what name should be used by an application to
refer to a person.

As far as I can tell, preferably, one would use FN to signify the
regionally-correct concatenation of the components
of N. Both of these would refer to the full legal name of the person in
question. Any personal appellations that one
has for the person in question would be given by NICKNAME. These
appellations would be used by applications
to label and sort the person.
Of course, he application may permit the usage of FN, Last Name, First Name
or First Name, Last Name as
the appellation by which a person is labeled and sorted. However, the
default behavior would be to use NICKNAME.

This has the benefit of allowing people to supply vCards which would then
need to be only minimally modified
by their acquaintances - just enough to have the vCard use the name those
acquaintances use to label those people,.
Thus, John Joe Doe from the example above would give the same vCard, who
would then insert a line causing him
to be referred to as "Boss", "Dad", "Kid", etc.

In brief, assuming I refer to a person by a name that is not their full
name, how do I
A) correctly note this in their vCard,
B) write a standards-conforming program that displays and sorts the person
the same way I refer to them?

Thank you in advance,
Gesh