Network Working Group M. Mealling Internet-Draft Verisign Expires: April 28, 2002 October 28, 2001 Dynamic Delegation Discovery System (DDDS) Part One: The Comprehensive DDDS Standard draft-ietf-urn-ddds-toc-00.txt Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on April 28, 2002. Copyright Notice Copyright (C) The Internet Society (2001). All Rights Reserved. Abstract This document specifies the exact documents that make up the complete Dynamic Delegation Discovery System (DDDS) standard. The DDDS is an abstract algorithm for applying dynamically retrieved string transformation rules to an application-unique string. This document along with RFC XXXX, RFC YYYY and RFC ZZZZ obsolete RFC 2168 [8] and RFC 2915 [6] as well as update RFC 2276 [5]. Mealling Expires April 28, 2002 [Page 1] Internet-Draft DDDS October 2001 1. Intended Audience This document and the documents that it references are intended for anyone attempting to implement or understand the generic DDDS algorithm, URI Resolution, ENUM telephone number to URI resolution, and the NAPTR DNS resource record. The reader is warned that reading one of the documents in this series without reading the others will probably lead to misunderstandings and interoperability problems. Mealling Expires April 28, 2002 [Page 2] Internet-Draft DDDS October 2001 2. Introduction The Dynamic Delegation Discovery System is used to implement lazy binding of strings to data, in order to support dynamically configured delegation systems. The DDDS functions by mapping some unique string to data stored within a DDDS Database by iteratively applying string transformation rules until a terminal condition is reached. This document defines the entire DDDS standard by listing the documents that make up the complete specification at this time. This document along with RFC XXXX, RFC YYYY and RFC ZZZZ obsolete RFC 2168 [8] and RFC 2915 [6] as well as update RFC 2276 [5]. This document will be updated and or obsoleted when changes are made to the DDDS specifications. Thus the reader is strongly encouraged to check the IETF RFC repository for any documents that obsolete or update this one. Mealling Expires April 28, 2002 [Page 3] Internet-Draft DDDS October 2001 3. The Algorithm The DDDS algorithm is defined by RFC XXXX [1]. That document defines the following DDDS concepts: o The basic DDDS vocabulary o The algorithm o The requirements on applications using the algorithm o The requirements on databases that store DDDS rules RFC XXXX is the actual DDDS algorithm Specification. But the specification by itself is useless without some additional document that defines how and why the algorithm is used. These documents are called Applications and do not actually make up part of the DDDS core specification. Applications require databases in which to store their Rules. These databases are called DDDS Databases and are usually specified in seperate documents. But again, these Database specifications are not included in the DDDS core specification itself. Mealling Expires April 28, 2002 [Page 4] Internet-Draft DDDS October 2001 4. DDDS Applications No implementation can begin without an Application specification, as this is what provides the concrete instantiation details for the DDDS. Without them the DDDS is nothing more than a general algorithm. Application documents define the following: o the Application Unique String (the thing the delegation rules act on) o the First Well Known Rule (the Rule that says where the process starts) o the list of valid Databases (you can't just use any Database) o the final expected output Some sample Applications are documented in: o "E.164 number and DNS" (RFC 2916) [7]. This Application uses the DDDS to map a telephone number to service endpoints such as SIP or email. o "Dynamic Delegation Discovery System (DDDS) Part Four: The URI Resolution Application" (RFC YYYY) [3]. This Application uses the DDDS to resolve any URI to a set of endpoints or 'resolvers' that can give additional information about the URI independent of its particular URI scheme. Mealling Expires April 28, 2002 [Page 5] Internet-Draft DDDS October 2001 5. Currently Standardized Databases Any DDDS Application must use some type of DDDS Database. Database documents define the following: o the general spec for how the Database works o formats for Keys o formats for Rules o Key lookup process o rule insertion procedures o collision avoidance measures A Database cannot be used on its own; there must be at least one Application that uses it. Multiple Databases and Applications are defined, and some Databases will support multiple Applications. However, not every Application uses each Database, and vice versa. Thus, compliance is defined by the combination of a Database and Application specification. One sample Database specification are documented in: o "Dynamic Delegation Discovery System (DDDS) Part Three: The DNS Database" (RFC XXXX) [1] (This document is the official specification for the NAPTR DNS Resource Record) Mealling Expires April 28, 2002 [Page 6] Internet-Draft DDDS October 2001 References [1] Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part Two: The Algorithm", RFC XXXX, draft-ietf-urn-ddds-05.txt (work in progress), May 2000. [2] Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part Three: The DNS Database", RFC ZZZZ, draft-ietf-urn-dns-ddds- database-07.txt (work in progress), May 2000. [3] Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part Four: The URI Resolution Application", RFC YYYY, draft-ietf-urn- uri-res-ddds-05.txt (work in progress), October 2000. [4] Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part Five: URI.ARPA Assignment Procedures", RFC VVVV, draft-ietf-urn- net-procedures-09.txt (work in progress), October 2001. [5] Sollins, K., "Architectural Principles of Uniform Resource Name Resolution", RFC 2276, January 1998. [6] Mealling, M. and R. Daniel, "The Naming Authority Pointer (NAPTR) DNS Resource Record", RFC 2915, August 2000. [7] Faltstrom, P., "E.164 number and DNS", RFC 2916, September 2000. [8] Daniel, R. and M. Mealling, "Resolution of Uniform Resource Identifiers using the Domain Name System", RFC 2168, June 1997. Author's Address Michael Mealling Verisign 505 Huntmar Park Drive Herndon, VA 22070 US Phone: +1 770 921-2251 EMail: michaelm@netsol.com URI: http://www.verisign.com Mealling Expires April 28, 2002 [Page 7] Internet-Draft DDDS October 2001 Full Copyright Statement Copyright (C) The Internet Society (2001). All Rights Reserved. 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