On graphs and equivalences
ebw at abenaki.wabanaki.net
Fri Dec 4 17:08:20 CET 2009
The assertion that in Script X a casing property is required to form
persistent resource identifiers appears to be an assumption present in
Vaggelis' note on the desirability of an aliasing mechanism between
two or more directed acyclic subgraphs existing in one or more root
This assertion does not appear to have been proved, and it appears to
be a special case of a requirement to define equivalence classes for
characters, or their sequences, and necessarily any subgraphs anchored
from the nodes where elements of the equivalence classes exist.
An approach, "intermediate tables", was proposed in-protocol during
the course of the IDN WG. The proposal was not adopted and was not
incorporated in the IDNA2003 specifications.
Another specification, published as RFC 3743, Joint Engineering Team
(JET) Guidelines for Internationalized Domain Names (IDN) Registration
and Administration for Chinese, Japanese, and Korean, proposed a
solution not dependent upon the correct functioning of the IDNA2003
I lack the subject matter expertise to form an opinion on the
necessity claim for tonos-free repertoire ("upper case") for the
meaningful formation of resource identifiers, and therefore the
necessity to form character equivalence classes.
If the necessity claim arises from "words", then it suffers the same
defect that the claims made for other "word properties", in that they
are out of scope for a working group engaged in the specification of
persistent resource identifiers.
More information about the Idna-update