DDDS
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... naming conventions (so-called name hacks). The proposal defines a
Dynamic Delegation Discovery System (DDDS -- see [4]) Application to
map domain name ...
... service are limited in terms of the use cases supported. To address
some of the limitations, this document defines a DDDS Application to
map service+protocol+domain ...
...
The precise details of the specification of this DDDS application are
given in Section 6. This section defines the usage of the DDDS
application.
...
... The precise details of the specification of this DDDS application are
given in Section 6. This section defines the usage of the DDDS
application.
...
... S-NAPTR DDDS Application Usage ...
... service+protocol information for a given domain. Following the DDDS
standard, these records are looked up, and the rewrite rules
(contained in the NAPTR records ...
... SERVICE field to find a match. In the case of the S-NAPTR DDDS
application, this means a SERVICE field that includes the tags for
...
... NAPTR lookups because they denote the end of the
DDDS/NAPTR processing rules. In the case of an "S" flag, the
...
... RR set.
It MAY choose to run simultaneous DDDS resolutions for more than one
protocol, in which case the requirements above apply for each
...
... application protocol (or
service) standard to define a separate DDDS application.
Note that this approach is intended specifically for use when it
...
... foobar.example.com to example.com, if applicable).
Although this document proposes a DDDS application that does not use
all the features of NAPTR resource records, it is not intended to
...
... Although S-NAPTR aims to provide a "straightforward" application of
DDDS and use of NAPTR records, it is still possible to create very
...
... service for a particular domain. This
DDDS-based approach is used to find the CredReg server that holds the
information.
...
... Assuming that "EM" was registered as an application service, this
DDDS application could be used to determine the available services
for delivery ...
... from "example.com" for "ProtC" and "ProtB" servers.
Using this DDDS-based approach, thinkingcat.example can indicate a
preference ranking for the different types of servers for the
extensible messaging service ...
... layer of indirection and are focused
on server administration rather than on application naming.
Furthermore, although the DDDS specification and use of NAPTR allows
multiple levels of redirection before the target ...
... An expected question at this point is: this is so similar in
structure to SRV records, why are we doing this with DDDS/NAPTR?
...
... NAPTR records cannot appear in the wild;
see [4]. They must be part of a DDDS application.
The purpose here is to define a single, common mechanism (the DDDS
application ...
... DDDS application.
The purpose here is to define a single, common mechanism (the DDDS
application) to use NAPTR when all that is desired is simple DNS-
...
... difficult to test and administer.
The proposed DDDS application specifically uses a subset of NAPTR's
abilities. Only "replacement" expressions are allowed, not "regular
expressions ...
...
This section formally defines the DDDS application, as described in
[4].
...
... domain.
Consistent with the DDDS algorithm, if the Flag string is empty the
next lookup is for another NAPTR record ...
... Note that this is similar to, but not the same as the syntax used in
the URI DDDS application ([6]). The DDDS DNS ...
... DNS database requires each
DDDS application to define the syntax of allowable service strings.
The syntax here is expanded to allow the characters that are valid ...
...
At present only one DDDS Database is specified for this Application.
[5] specifies that a DDDS Database ...
... DDDS Database is specified for this Application.
[5] specifies that a DDDS Database using the NAPTR DNS resource
record contain the rewrite rules. The Keys for this database are
...
... Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part One: The Comprehensive DDDS", RFC 3401, October 2002. ...
... Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part One: The Comprehensive DDDS", RFC 3401, October 2002. ...
... Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part Three: The Domain Name System (DNS) Database ...
... Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part Four: The Uniform Resource Identifiers (URI)", RFC 3404prop ...