Summary

  • RFC 1384 placed participating countries, international organisations, a few localities and limited directory-server information at the top of an X.500 pilot Directory Information Tree. It said the “Internet” organisation entry had been adopted for the service without formal registration.
  • Countries alone had a recognised top-level registration authority. Multinational companies belonged under national paths, with aliases or looser links connecting their branches.

Imagine opening a directory and seeing two folders at the top. One sits there under a recognised registration process. The other is there because the directory's operators needed a practical place to put it. The folders look equally high in the tree. Their authority has different paperwork.

That was the awkward arrangement in RFC 1384, the naming guide Peter Barker and Steve Hardcastle-Kille published in January 1993 for X.500 directory pilots. The guide wanted a tree people could search. At its top it allowed countries, international organisations, a few locality entries and minimal information about directory servers. It made a sharp distinction between an international organisation with a genuinely supra-national brief and a commercial multinational that happened to operate in several countries. Only the former could sit directly under the root.

Then came the intriguing occupant. The memo said “Internet” was the sole international-organisation entry registered so far, and immediately added that its registration was not formal: the entry had been adopted for the Internet Directory Service. It also put the DNS portion of this X.500 directory tree under O=Internet, rather than at the tree's root. This is a statement about a directory naming path; it says nothing about control of the DNS root zone.

The guide did not try to hide the institutional mismatch. It said countries were the only top-level directory information with a recognised registration authority. Other top-level entries could cause problems. The authors nevertheless judged their usefulness worth the pilot's risk. The arrangement let search work before every corner of the naming system had an official registrar. It also made a top-level position easy to mistake for a top-level mandate.

Commercial multinationals received a different treatment. A company operating in several countries did not become an international organisation by buying offices abroad. Its entries belonged under country or locality branches. The guide offered three ways to make the pieces discoverable: one central organisational subtree with aliases from countries where it operated; separate national subtrees connected by aliases; or separate parts joined by soft seeAlso references that a user interface would have to choose to follow. Those were different answers to a question with operational consequences: when someone searches the directory, whose map of the company do they see?

Even the choice of a short name had a governance cost. The guide preferred the full “University College London” over “UCL” for a directory entry, because initials that felt unique inside one institution might collide with other organisations outside it. An abbreviation could remain as an alternate name for search. The point was not to make the tree copy an organisational chart. The authors favoured a shallow structure that a person could query, even where that cut against a company's internal hierarchy.

The original document is an Informational guide to a pilot, not a census of directory deployments. Its useful historical fact is the explicit separation it made between placement and registration. “Internet” could have a working address near the top. A country entry could have a recognised registration authority. The tree displayed both on adjacent branches, and the memo told readers exactly why those branches carried different weight.