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Old 6th September 2009, 01:03 PM
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Mapping Characters in IDNA

http://tools.ietf.org/html/draft-iet...is-mappings-04

Abstract

In the original version of the Internationalized Domain Names in
Applications (IDNA) protocol, any Unicode code points taken from user
input were mapped into a set of Unicode code points that "make
sense", which were then encoded and passed to the domain name system
(DNS). The current version of IDNA presumes that the input to the
protocol comes from a set of "permitted" code points, which it then
encodes and passes to the DNS, but does not specify what to do with
the result of user input. This document describes the actions that
can be taken by an implementation between user input and passing
permitted code points to the new IDNA protocol.
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Old 6th September 2009, 07:26 PM
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Re: Mapping Characters in IDNA

bye bye symbol domains

bye bye domains with both Arabic-Indic Digits and Extended Arabic-Indic Digits. (not that anyone has any, I hope).
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Old 6th September 2009, 10:39 PM
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Re: Mapping Characters in IDNA

When will Verisign support Unicode 5.1?
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Old 7th September 2009, 12:11 AM
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Re: Mapping Characters in IDNA

One of the authors is an employee of Qualcomm so i guess they want to make sure it works with their wireless phone technology

Qualcomm (NASDAQ: QCOM) is a wireless telecommunications research and development company, as well as the largest fabless chip supplier in the world, based in San Diego, California.) The company is the designer and supplier of CDMA chipsets, system software, network base stations, handsets, modems, kid trackers, camera phones, MP3 players and game players)

http://en.wikipedia.org/wiki/Qualcomm
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Old 7th September 2009, 12:36 AM
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Re: Mapping Characters in IDNA

Quote:
Originally Posted by blastfromthepast View Post
When will Verisign support Unicode 5.1?
In what? VeriSign doesn't decide which version of Unicode is supported in IDNs. That is the job of the IETF.
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Old 7th September 2009, 04:50 AM
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Re: Mapping Characters in IDNA

Quote:
Originally Posted by domainguru View Post
In what? VeriSign doesn't decide which version of Unicode is supported in IDNs. That is the job of the IETF.
Who it seems are about to bring in all the the necessary changes to support IDN in advance of the meeting in Seoul. Even ICANN has no real say over this.
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Old 7th September 2009, 06:04 PM
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Re: Mapping Characters in IDNA

i scroll to the document and the various associated documents and still did not understood what is prohibited and what is going to be prohibited and the consequences for that: even if a domain stops resolving it still can have value as a peace of rarity to collectors. the drastic measure is impose the drop of the domains from the registry.

also, i still can't find what are the DISALLOWED characters.

4..2.2. Rejection of Characters that are not Permitted

The candidate Unicode string MUST NOT contain characters that appear
in the "DISALLOWED" and "UNASSIGNED" lists specified in
[IDNA2008-Tables].

this leads to a site on IETF that is a drop point for documents.


there is also the case for symbols used as diacritics that must not begin a domain name:

4.2.3.2. Leading Combining Marks

The Unicode string MUST NOT begin with a combining mark or combining
character (see The Unicode Standard, Section 2.11 [Unicode] for an
exact definition).

and according to the Unicode standard: http://www.unicode.org/versions/Unicode5.0.0/ch02.pdf

one can have a domain name that result from the combination of
a + @¨ + u -> äu (not aü)

but not
@¨ + a + u -> @¨au

so something like "`ab.com" should not be possible. but how about domains like ":ab.com" is permited? or "$ab.com"?

and where it is mentioned that symbols can't be used? and which symbols?

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Old 8th September 2009, 07:01 PM
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Re: Mapping Characters in IDNA

Bill is correct about Qualcomm being right in the middle of IDNA and IETF for
domain mapping for mobile handset use.


The key is that mobile carriers want to minimize DNS requests as much as possible.
Remember the network design was for voice first, then sms data, and now 3G data...

So they want to be able to use the 10 digit/14 digit number of the handset as best they can, rather than DNS or IP address or sub net addresses...

Eventually this has to relent, because mobile phones /devices will be 7/24
webservers themselves with 4G.

Carriers do not want to have 'emoticons' or symbollic domains ...
so if a symbol can not get into a variant table for dozens of languages....
it will be tough luck...

middle east / muslim nations would protest the 'half moon' symbol as an example....
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Old 10th September 2009, 03:01 AM
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Re: Mapping Characters in IDNA

Quote:
Originally Posted by domainguru View Post
In what? VeriSign doesn't decide which version of Unicode is supported in IDNs. That is the job of the IETF.
There was an updated nameprep update last year already? But it still is not implemented?
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Old 10th September 2009, 06:17 AM
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Re: Mapping Characters in IDNA

From what I can gather, just with a quick browse, nameprep is no longer required, due to the more details tables?
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