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- From: ketil@edb.tih.no (Ketil Albertsen,TIH)
- Newsgroups: comp.protocols.iso.x400
- Subject: Re: The "I" field
- Message-ID: <1993Jan10.120626.11429W@lumina.edb.tih.no>
- Date: 10 Jan 93 12:06:17 GMT
- References: <1993Jan8.111416.24490@ugle.unit.no> <726504366snz@mwassocs.demon.co.uk>
- Sender: ketil@edb.tih.no (Ketil Albertsen,TIH)
- Reply-To: ketil@edb.tih.no
- Organization: T I H / T I S I P
- Lines: 81
- Posting-Front-End: Winix Conference v 92.05.15 1.20 (running under MS-Windows)
-
- In article <726504366snz@mwassocs.demon.co.uk>,
- whyman@mwassocs.demon.co.uk (Tony Whyman) writes:
-
- >>The recommendation to include the first letter of the G when the G is
- used
- >>is silly. Ignore it.
- >
- >Yes, it is silly, but if you implement the standard ignoring it then a
- >conformance tester may label your implementation as non-comformant. If
- >you really think it should be ignored then please send a defect report to
- >the CCITT.
-
- I didn't take time to read the entire X.400, so I may have overlooked
- something. X.402, 18.3.12 c) identifies "the initials of all his names
- but his surname" as an optional piece of information out of the four
- that makes up a personal-name. So it looks as if - in principle - the
- initial of the Givenname should be included.
-
- I am honestly surprised. There's a built-in redundancy, unnormalization
- or whatever you call it - a built-in source of potential inconsistency.
- Further, with this use of I a user interface cannot display a personal-
- name by simply printing the G, I and S fields - it must match the
- characters in I one by one to the words in G and remove those matching.
-
- Also the "one letter per name" does not fit with all national languages
- and conventions. Eg. in Norwegian, some names are conventionally
- "initialized" using more than one character, such as "Per Christian Bull"
- being written "Per Chr. Bull" or "Thorleif Hjeltnes" being "Th. Hjeltnes".
- Very often this convention is followed when there is a mute letter, like
- the h in Thorleif, or when one sound is written with two characters, like
- the k sound written as Ch in Christian. If the inital is written the way
- the user has always done it, a strict one-letter-per-name interpretation
- would be wrong.
-
- Note that "all his names" is not clearly defined. If these are intended
- to all be included in G, then the I contains zero bits of information;
- I feel that there is something objectionable in maintaining a 0-info
- element. If there may be "names" specified nowhere, there is a rule
- saying, in effect, "'I' may conatain anything as long as you don't
- tell us from which info you derive it - if you tell us, we will catch
- you if you try to cheat us". No, that was not the intention with I.
-
- I honestly think that the intention of the I field was to allow people
- who don't usually write their name in full to use an (read: some)
- abbreviated form. I think the authors did not intend to prevent people
- from writing their name the way they are used to. Quite to the contrary -
- I think they explicitly want to honor accepted conventions.
-
- Note that both G and I are optional, so you may use either your G+S, I+S
- and G+I+S. And also that a user may have multiple O/R-names - eg. one
- in each of these three forms (and the Is don't have to be identical).
- I won't believe that a conformance tester could rule an X.400 system
- non-conformant because it didn't detect "cheating" on the I attribute -
- I have glanced through X.403 (MHS: Conformance testing) without seeing
- anything pointing in that direction.
-
- There is a distinction between Directory name and an O/R address - a
- recipient may have multiple Directory names, eg. with different initials
- formats. Mappingfrom Dir name to O/R address is (as seen from X.400) a
- local matterthat should not influence open systems conformance. When you
- specify to the user interface a set of G, I and S attributes, are they to
- be treated as a Dir name subject to directory lookup, or as an O/R
- address? I would definitely prefer the first, Dir name. Then the I
- field cannot possibly be defined by X.400 conformance rules - only the
- result of the directory lookup. But I can't believe that conformance
- or not of an X.400 system can be a function of data entered by a
- user into a directory system! So, the danger of being caught by a
- conformance tester is very close to zero, in my understanding.
-
- Another interresting observation is that the X.500 standard attribute
- types (X.520) says nothing at all about any I attribute, as far as I
- can see. Is it defined somewhere else (in the X.400 series?), or is
- I simply not a standard attribute in the directory? (Obviously it can
- be stored in X.500 as a non-standard attribute type - about the only
- thing you cannot store in X.500 is hamburgers... :-) )
-
- Maybe there is a reason to send a defect report to the CCITT about the
- lack of precise specification of the Initials attribute. But I think I
- will wait to see the text of the 92 edition to get very upset about it.
-
- Ketil Albertsen
-