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n-1-1-030.70.2
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30.70.2 Directories
by Erik Huizer Erik.Huizer@SURFnet.nl
The importance of a global directory service which holds (and provides)
information on persons, applications and services, is a necessity that is
clearly perceived in the Internet Society. This is true for those aiming at
OSI-services as well as for those who prefer IP-based services. In 1988 the
first standard on directory services was published jointly by ICO and CCITT
and is commonly known as X.500. This standard has since then been put into
practical use in various (cooperating) Directory Services pilots within the
Internet Society. For example the Nysernet/PSI White Pages Project, the FOX
project and the European Paradise project. Many holes have been discovered in
the not yet full-grown standard and several workinggroups within the Internet
Society are working on these problems in a joined effort. Within the IETF there
are the OSI-DS working group and the DISI (Directory Information Services
Infrastructure) working group. In Europe there is the RARE WG3 on Directory
Services. The RARE WG3 and IETF-DS group share the same E-mail distributionlist
for discussions, called: osi-ds@cs.ucl.ac.uk (if you want to subscribe, send a
mail to: osi-ds-request@cs.ucl.ac.uk). The pilot projects mentioned above are
all inteconnected, and all use the same 'root' Directory Server for the world,
which is based in London (ULCC), and maintained by the Paradise project.
The currently registered amount of data in the pilot projects is not large, but
it is growing steadily. A recent survey ("Paradise International Report,
november 1991) shows the following figures:
DSAs Orgs Entries
Europe 3 3 1,000
Austria 3 18 1,516
Belgium 1 1 8
Denmark 2 340 920
Finland 16 17 11,316
France 10 11 1,015
Germany 23 130 7,237
Greece - - -
Iceland 1 28 250
Ireland 1 1 1,500
Israel 1 1 10
Italy 2 2 20
Netherlands 3 7 2,128
Norway 9 426 15,934
Portugal 1 1 10
Spain 5 10 170
Sweden 6 37 19,000
Switzerland 9 7 24,152
United Kingdom 48 40 54,387
Yugoslavia - - -
Europe 144 1,080 140,573
Australia 23 29 30,231
Brasil 1 - -
Canada 11 11 21,285
Japan 13 13 2,100
New Zealand 1 1 100
United States 117 132 280,979
Grand Total 310 1,212 421,552
Almost all of this data comes from organizations closely related to the
Internet Society. PTT involvement has so far been minimal, but it is expected
that this will change rapidly in the next couple of years. For example in the
Paradise project PTT Telecom (The Netherlands) is a participant, responsible
for interwoking tests. Industry, in the form of the major Computer
Manufacturing companies, is showing more and more interest, and is
participating in a.o. the IETF-DS group.
Recently the DISI group has published an internet-draft available as
draft-ietf-disi-catalog-01.txt, which lists the currently available X.500
products. Within the pilot projects the ISODE/Quipu implementation is the one
that is mostly used. Other products that are used are the Pizarro
implementation (fr) and the DirWiz implementation (it). It is expected that in
1992 commercial X.500 products and the e.g. the NIST (custos) product will be
integrated into the pilot projects.
(SURFnet BV)