IANA
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In order for the IANA to manage a given name space prudently, it
needs guidelines describing the conditions under which new values
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... (central) coordination. In the Domain Name System, for example, the
IANA only deals with assignments at the higher-levels, while
subdomains are administered by the organization to which the space
has been delegated. As another example, Object Identifiers ...
... ASSIGNED]. When a name space
can be delegated, the IANA only deals with assignments at the top
level.
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... name
space in some manner. This route should be pursued when appropriate,
as it lessens the burden on the IANA for dealing with assignments.
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... name space is essentially unlimited, and assigned
numbers can safely be given out to anyone. When no subjective review
is needed, the IANA can make assignments directly, provided that the
IANA is given specific instructions on what types of requests it
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... is needed, the IANA can make assignments directly, provided that the
IANA is given specific instructions on what types of requests it
should grant, and what information must be provided before a request
for an assigned number will be considered. Note that the IANA ...
... IANA is given specific instructions on what types of requests it
should grant, and what information must be provided before a request
for an assigned number will be considered. Note that the IANA will
not define an assignment policy; it should be given a set of
guidelines that allow it to make allocation decisions with little
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... expertise, opinions may vary and discussions may continue for some
time without resolution. In addition, the IANA cannot participate in
all of these mailing lists and cannot determine if or when such
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... mailing lists and cannot determine if or when such
discussions reach consensus. Therefore, the IANA cannot allow
general mailing lists to fill the role ...
... role of providing definitive
recommendations regarding a registration question. Instead, the IANA
will use a designated subject matter expert. The IANA ...
... IANA
will use a designated subject matter expert. The IANA will rely on a
"designated expert" to advise it in assignment matters. That is, the
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... "designated expert" to advise it in assignment matters. That is, the
IANA forwards the requests it receives to a specific point-of-contact
(one or a small number of individuals) and acts upon the returned
recommendation from the designated expert ...
... purpose defined by the local site. No attempt is made to
prevent multiple sites from using the same value in different
(and incompatible) ways. There is no need for IANA to review
such assignments and assignments are not generally useful for
interoperability ...
... provided they have been given control over that part of the
name space. IANA controls the higher levels of the namespace
according to one of the other policies.
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... long as they provide a point of contact and a brief
description of what the value would be used for. For
numbers, the exact value is generally assigned by the IANA;
with names, specific names are usually requested.
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... Working Group and/or document author's
job to formulate an appropriate policy and specify it in the
appropriate document. In some cases, having an "IANA Considerations"
section may be appropriate. Specifically, documents that create an
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... name space (or modify the definition of an existing space) and that
expect the IANA to play a role in maintaining that space (e.g.,
serving as a repository for registered values) MUST document the
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... if the IANA is expected to make assignments without requiring an
outside review, sufficient guidance MUST be provided so that the
requests can be evaluated with minimal subjectivity.
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Authors SHOULD attempt to provide guidelines that allow the IANA to
assign new values directly without requiring review by a Designated
Expert. This can be done easily in many cases by designating a range ...
... Designated
Expert. This can be done easily in many cases by designating a range
of values for direct assignment by the IANA while simultaneously
reserving a sufficient portion of the name space for future use by
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For examples of documents that provide good and detailed guidance to
the IANA on the issue of assigning numbers, consult [MIME-REG, MIME-LANG].
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For all existing RFCs that either explicitly or implicitly rely on
the IANA to evaluate assignments without specifying a precise
evaluation policy, the IANA will continue to decide what policy is
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... the IANA to evaluate assignments without specifying a precise
evaluation policy, the IANA will continue to decide what policy is
appropriate. The default policy has been first come, first served.
Changes to existing policies can always be initiated through the
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All future RFCs that either explicitly or implicitly rely on the IANA
to register or otherwise manage assignments MUST provide guidelines
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... types, operation codes, keywords, etc.) used in IETF protocols or
registered by the IANA. All descriptions of security issues must be
as accurate as possible regardless of level of registration ...
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Jon Postel and Joyce K. Reynolds provided a detailed explanation on
what the IANA needs in order to manage assignments efficiently, and
patiently provided comments on multiple versions of this document.
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... Alvestrand, H. and T. Narten, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, . ...