Slovenian Education Network

Vladimir Batagelj, Andrej Brodnik, Matija Lokar, Janez ^a~

Version in Slovene language:

Viribus unitis.
    Franc Jo`ef I.
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The Web, like paper, should be a universal medium, in which it is possible for all kinds of information to exist.

    Tim Berners-Lee, Technology Review, July 1996


In 1994, the Slovenian government started a six years project RO -- Ra~unalni{ko opismenjevanje / Information Technology in Slovenian Schools. It should contribute toward problem oriented, more efficient and more friendly school.

The following factors were identified as crucial for the success of the project:

The Internet offers a lot - the whole world; that is too much. The problem is to find the desired information. The answer is known - organization.
We expect that in the following years a number of schools will establish their own servers and offer through them their own educational materials. Besides, there were/will be established servers at individual faculties and other institutions connected with the educational process (museums, galleries, institutes, ...).
In October 1995 we decided to start organizing Slovensko izobra`evalno omre`je / Slovenian Education Network -- SEN, that should provide access to individual servers and material offered through them.
Schoolnet/Canada is an example of a similar network.


Organizing the SEN we have to consider the following principles:



SEN - Slovenian Education Network is built on top of ARNES (Academic and Research Network of Slovenia).

SEN consists of three levels:

Upper Level - Ring of Entry Servers:
consists of a small number of entry servers that have knowledge about the structure of the Network and direct the user to the proper server/material. All entry servers are equivalent - they provide the same information about the Network. This ensures the robustness against failure of an individual server and the distribution of workload.
Lower Level - Information Providers:
consists of ordinary servers that actually provide the information. For some time some information providers will be hosted at other organization's servers.
User Level
consists of users/schools with the Internet access.

Entry Servers

  1. Entry servers are appointed by the RO Program Committee:
    FMF, Z[, Z[(new look), FRI in MS.
  2. Duties of entry servers are:
    • to keep information about the current status of the SEN and the list of services the Network offers, and to provide access to these services;
    • to offer additional information services;
    • to guarantee uninterrupted work, trained staff, and sufficiently powerful equipment (computers, disks, communications);
  3. All entry servers have the same structure of information about the SEN - system services:
    • a system service is maintained at a selected entry server - its staff becomes service's maintainer; maintenance can be delegated to the third party;
    • a maintainer has complete responsibility and right to update the service;
    • system services are mirrored at all entry servers.
  4. Entry servers may offer their own information as ordinary servers.
  5. If a certain entry server is not fulfilling its duties it loses its status.

Services of Entry Servers

Ordinary Servers

  1. To become a member of the SEN, an ordinary server applies to the maintainer of the List of ordinary servers. The application contains:
    • URL of the entry page of the server;
    • e-mail address of the server administrator;
    • postal address, phone number, fax;
    • basic data about the server: type of computer, operating system, server program, public phone numbers to access the server, work schedule;
    • brief description of the information it offers.
    See also the application form.
  2. On the entry page of the ordinary server has to appear the emblem of the SEN and the connection to the closest entry server. Somewhere on the server also has to appear the list of all entry servers.
  3. Responsibilities of ordinary servers are:
    • to inform maintainers on entry servers about the changes in the offered material;
    • in case of a change, to update the list of entry servers

Services of Ordinary Servers

They provide and support:

Some Problems and Solutions


Trubar is a system of programs to build, search and maintain the catalogs - collections of units described by list of properties: dictionaries, directories, lexicons, catalogs, inventories, glossaries, ...

Tools, like Trubar,


In the design of the Slovenian Education Network also participated: Marko Bona~, Sa{a Divjak, Tomi Dolenc, Renato Luka~, Nada Razpet, Toma` Skulj, and Matja` Zaver{nik.

The design of the new look is by Zarja Vintar; realization by Ale{ Stru`nik and Jernej Vi~i~.
This paper is an updated version of the paper presented at Inter-Med'96, Barcelona, January 19-20, 1996.
Last change: October 14, 1996