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January 2012

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Forward DOMAIN Object Cleanup and Syntax Changes
by Denis Walker 31 Jan '12

31 Jan '12

[Apologies for duplicate emails] Dear colleagues, At RIPE 57, the RIPE NCC was asked to remove all forward domain data from the RIPE Database. The last two ccTLD operators' data was removed today, 31 January 2011. The RIPE NCC can now confirm the completion of action point AP57.2 from the RIPE Database Working Group. At RIPE 62, the RIPE NCC was asked to look at the attributes in DOMAIN objects. With the removal of any hierarchy in reverse delegations and the removal of forward domain data, we no longer see any use case for the "mnt-lower:" attribute. Other attributes that it has been suggested were used only for forward domains are: - "refer:" - "sub-dom:" - "dom-net:" The statistics listed at the bottom of this email show how many of these attributes have been added to ENUM and reverse delegation DOMAIN objects. It has also been suggested that the "nserver:" optional attribute could be made a "required" attribute in reverse delegation DOMAIN objects. It could remain optional in ENUM DOMAIN objects or it could be disallowed. The RIPE NCC asked the community in July 2011 if anyone saw any justification for the use of these attributes in ENUM or reverse delegation DOMAIN objects. We did not receive any feedback on this. If there is no justification, the syntax of the DOMAIN object can be adjusted to deprecate these attributes. Then all current DOMAIN objects in the RIPE Database can be "cleaned" to remove this data. Business rules can be added to make the "nserver:" attribute required or disallowed in different types of DOMAIN objects, if this is considered useful. To keep the discussion focused, please send any comments or feedback to the DNS Working Group mailing list. Regards, Denis Walker Business Analyst RIPE NCC Database Group Statistics (as at July 2011) ---------- Number of each attribute used in reverse delegations or ENUMs and the number of unique maintainers who manage these objects. "refer:" = 6 unique maintainers = 1 "sub-dom:" = 271 unique maintainers = 23 "dom-net:" = 2,219 unique maintainers = 140 "mnt-lower:" = 46,485 unique maintainers = 4,208

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