File:Prestel videotex service database - "inverted tree" structure.png
Size of this preview: 800 × 208 pixels. Other resolution: 867 × 225 pixels.
Original file (867 × 225 pixels, file size: 3 KB, MIME type: image/png)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: When the public Prestel videotex service began in 1979, a user connecting to the system was presented with a main index page. As they made and keyed successive menu choices, they moved down a subject hierarchy, from the general to the specific, to finish with the information page they sought. The Post Office, academics, and the media referred to this hierarchical database arrangement as a tree structure or "inverted tree". The diagram is based on Williams, Ederyn (1981), "Who's who on the Prestel database" in Winsbury, Rex (ed.), "Viewdata in Action: a Comparative Study of Prestel". London: McGraw-Hill. p. 104, Fig. 6.1. |
| Date | |
| Source | Own work |
| Author | Protalina |
Created as a Word table, captured using Snipping Tool, adjusted with Paint.
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:58, 2 November 2024 | | 867 × 225 (3 KB) | Protalina | Uploaded own work with UploadWizard |
File usage
The following page uses this file:
