Chinese Domain Name Consortium (CDNC) Status Update for IDN

1
Chinese Domain Name Consortium (CDNC) Status
Update for IDN

• CDNC
• Vincent WS Chen, TWNIC
• 2003.03.25

2
CDNC Status update

• CDNC Introduction
• Major Activities on IDN/CDN
• Status of Chinese Variant Table
• Issues
• Next Step

3
The Chinese Domain Name Consortium (CDNC)

• Since May, 2000
• CDNC was founded by CNNIC, TWNIC, HKNIC, MONIC in
  Beijing.
• Currently co-chairs
• Prof. Hua-lin Qian (CNNIC)
• Dr. Shian-shyong Tseng (TWNIC)
• Members
• CNNIC, TWNIC, HKNIC, MONIC
• Other organizations with DN technology and
  knowledge, which are interested in CDN(Chinese
  domain name).

4
Other related Organizations

• JET
• Joint Engineer Task force for IDN effort
• Members TWNIC, CNNIC, JPNIC, KRNIC
• TWNIC IDN Task force
• Since May, 2000
• Mission
• Study CDN technology and implementation solutions
• TW Variant Table Working Group
• Since Feb. 2002
• Mission
• Edit Traditional Chinese Variant Table and
  coordinate Simplified Chinese Variant Table with
  CNNIC for CDN

5
Major Activities on IDN/CDN

• CDNC announcement on current IDN solution in Feb,
  and June 2002
• No solution for Chinese TC/SC equivalence in IETF
  architecture
• No complementary documents for corresponding IDN
  registration and administration
• Aug. 2002, 8th CDNC meeting in Yokohama
• Joint development for CDN client software
• Modification on algorithm of IDN Admin. guideline
  draft
• Consider to make Chinese variant table

6
Major Activities on IDN/CDN

• Oct. 2002, 9th CDNC meeting in shanghai
• Discussion on Chinese character variant tables
• Plan to merge CN/TW tables into one table in Dec.
  2002
• Development of client and its supporting system
• Suggestions on options of the algorithm of
  guideline draft
• Feb. 2003, 10th CDNC meeting in Taipei
• Merge CN/TW tables
• CDN demonstration system to get user experience
• for draft table usage

7
Major Activities on IDN/CDN

• IETF draft
• Internationalized Domain Names and Unique
  Identifiers/Names(uname)
• Traditional and Simplified Chinese
  Conversion(TSCONV)
• Requirements of Chinese Domain Name(CDNREQ)
• Phased Implementation for Internationalized
  Domain Names in Applications (PIIDNA)
• And other drafts
• IDN Admin Guideline
• http//www1.ietf.org/mail-archive/ietf-announce/Cu
  rrent/msg18308.html
• http//www1.ietf.org/mail-archive/ietf-announce/Cu
  rrent/msg20812.html
• http//www.ietf.org/internet-drafts/draft-jseng-id
  n-admin-02.txt

8
Status of Chinese Variant Table

• TC/SC interchangeable is the must
• Chinese variant table for CDN registration and
  administration
• TW variant table
• CN variant table
• Chinese variant table (CVT)
• One Table includes TW and CN variant table

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Why TC/SC

• In 1956 and 1964, mainland China publish A
  Complete Set of Simplified Chinese Characters
• It convert some Tradition Chinese to Simplified
  Chinese
• Ex? ? ?? ? ?

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TC/SC mapping

• TC ? SC 1 to 1 mapping
• TC ? SC many to 1 mapping
• Ex? ? ?? ? ?
• TC ? SC 1 to many mapping
• Ex? ? ?? ? ?

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TW variant Table Working Group

• The 16th TWVT WG meeting has held at February 20,
  2003
• Members
• Linguist from Academia SINICA
• Computer expert from National Central University
  (NCU)
• Linguist from Taipei Computer Association (TCA)
• Linguist from CMEX (Foundation)
• Linguist from Directorate General of Budget
  Accounting and Statistics Executive Yuan R.O.C.
  (DGBAS)
• Linguist from IBM Taiwan

12
Status of TW Variant Table

• Submit revised draft table to the Bureau of
  Standard, Taiwan
• June, 2002
• October, 2002
• December, 2002
• Next revised draft table
• Expected to submit in this March
• After reviewed by the Bureau of Standard, Taiwan
  the Chinese Variant Table would become CNS
  standard

13
Status of CN Variant Table

• Invite linguists as the advisers to review the
  variant table created by TW variant Table Working
  Group
• CN variant table 1st version has been finished in
  last month
• Based on table of TWNIC, minor modification will
  be adopted
• Will be completed soon

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CVT Structure and Definition

• Character for registration (CR)
• All the Chinese character code point that could
  be registered as CDN
• TW Corresponding character
• T-source Chinese character code point which
  correspond to CR
• CN Corresponding character
• G-source Chinese character code point which
  correspond to CR
• Relevant character
• All the variant code point related to CR

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CVT Structure and Definition

• Character for registration
• CJK Han character
• 20902 CJK Unified Ideographs (4E00-9FA5)
• 52 Characters in Extension A
• LDH
• RFC 1035
• Alphabet a-z
• Numeric 0-9
• Symbol -
• 21017 code points will be included in this table

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Sample of CVT
Character for registration (CR) TW Corresponding character (TWCC) CN Corresponding character (CNCC) Relevant character(s) (RC) Remarks
? ? ? ? Mapping to oneself
? ? ? ? Mapping to oneself
? ? ? ?? 1-n mapping Only CR CC 2 RC Consistent RCs
? ? ? ?? 1-n mapping Only CR CC 2 RC Consistent RCs
? ? ? ?? 1-n mapping Only CR CC 2 RC Consistent RCs
? ? ? ?? 1-n mapping Only CR CC 2 RC Consistent RCs
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Sample of TCVT
Character for registration (CR) TW Corresponding character (TWCC) CN Corresponding character (CNCC) Relevant character(s) (RC) Remarks
? ? ? ??? 1-1 mapping Consistent RCs
? ? ? ??? 1-1 mapping Consistent RCs
? ? ? ??? 1-1 mapping Consistent RCs
? ???? ? ???? 1-n mapping Inconsistent RCs
? ?? ? ?? 1-n mapping Inconsistent RCs
? ? ? ?? 1-n mapping Inconsistent RCs
? ? ? ?? 1-n mapping Inconsistent RCs
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CVT Structure and Definition

• TW Corresponding character
• Adopt the corresponding character selected by TW
• 1 to 1 19,029
• 1 to many 1,925
• CN Corresponding character
• Adopt the corresponding character selected by CN
• 1 to 1 20943
• 1 to many 11

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CVT Structure and Definition

• Relevant character
• All the variant code points related to Character
  for Registration

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CVT Operation algorithm

• Character for registration (CR)
• Let user register one CDN
• Put the registered CDN in zone file
• TW Corresponding character (TWCC)
• If only one TWCC
• Put the TWCC DN in zone file
• If more than one TWCC
• Let user choose one TWCC DN then put in zone file

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CVT Operation algorithm

• CN Corresponding character (CNCC)
• If only one CNCC
• Put the CNCC DN in zone file
• If more than one CNCC
• Let user choose one CNCC DN then put in zone file
• Relevant character (RC)
• Reserve RC DN in registration database
• If Active RC DN
• Put the ARCDN in zone file

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CVT Operation algorithm

• CDN registration package
• CDN-CR (character for registration)
• TWCC DN
• CNCC DN
• RC DN
• ARC DN

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Demonstration(??.TW)

• Register CDN ??.TW
• TWCC DN ??.TW
• CNCC DN ??.TW
• RC DN none
• Zone file only 1 CDN ??.TW

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Demonstration(????.TW)

• Register CDN????.TW
• TWCC DN????.TW
• CNCC DN????.TW
• RC DN
• ????.TW
• ????.TW
• Zone file 2 CDN
• ????.TW
• ????.TW

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Demonstration(????.TW)

• RC DN
• ????.TW
• ????.TW
• RC DN could be active by registrant
• ????.TW
• Zone file 3 CDN
• ????.TW
• ????.TW
• ????.TW

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Demonstration(??.TW)

• Register CDN ??.TW
• TWCC DN ??.TW
• CNCC DN ??.TW
• RC DN
• ??.TW
• ??.TW
• ??.TW
• ??.TW
• Zone file 2 CDN
• ??.TW
• ??.TW

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Demonstration(??.TW)

• Register CDN ??.TW
• There are 4 TWCC DN
• ??.TW
• ??.TW
• ??.TW
• ??.TW
• Option process
• Let user to choose one TWCC DN
• TWCC DN ??.TW

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Demonstration(??.TW)

• CNCC DN ??.TW
• RC DN
• ??.TW
• ??.TW
• ??.TW
• ??.TW
• ??.TW
• Zone file 2 CDN
• ??.TW
• ??.TW

1. ??.TW
2. ??.TW
3. ??.TW
4. ??.TW
5. ??.TW

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Corresponding DN overlap

• CDN ??.TW and ??.TW
• Have the same CNCC DN??.TW
• FCFS principle
• The second registrant will not get the CNCC DN
• 4 overlapped RC DN
• ??.TW
• ??.TW
• ??.TW
• ??.TW

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Relevant Character DN overlap

• The result of RC DN will depending on register
  order
• Case 1
• If register ??.TW first
• Will get 4 RC DN
• Then register ??.TW
• Will get 10-46 RC DN
• Case 2
• If register ??.TW first
• Will get 10 RC DN
• Then register ??.TW
• Will not get RC DN

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Case study .tw CDN Statistics with CVT
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Too many Reserved CDN

• Register CDN ????????
• 972 RCDN
• Register CDN ?????????????
• More than 19,000 RC DN

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Issues

• Technical issue
• Reserved CDN overlap increase the registration
  system more complex
• Package register/delete/cancel/active/de-active
  need to relay on a sophisticated registration
  system to maintain the correct CDN package
• The amount of Zone file will increase after zone
  delegation

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Issues

• Policy issue
• Package register/delete/cancel/active/de-active
  policies, especially for overlapped characters
• Too many RCs and how to regulate by registration
  policy to decrease the database size and system
  workload
• Backward compatibility before or after
  registration, including implementing variant
  table
• new DRP for package concept if possible
• Variant table issue
• Table version and its backward compatibility

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Next Step

• To tune Chinese (CN/TW) variant table
• Consider users expectation
• Reduce RC size as possible
• Reduce TW Corresponding character 1 to many case
• 1 to many 1,925 --?988
• To set up the Rules for table use
• To implement table and develop API for CDN
• Registration and resolution
• To Work out feasible Registration policy
• Adopt IDN Admin Guideline
• Sunrise period

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• Q A