Sources of factual information - Data overview and validation

Unlike an inventory, a panorama does not claim to be exhaustive. Its aim is to give an overview of the resources available, the relative importance of each type of data in relation to the others, and to present the most representative products according to the criteria of notoriety recognized by professionals in the field. Information likely to change rapidly has not been systematically selected. Internet site addresses and the availability of databases on a server, when mentioned, should always be checked against specialized directories.

This article is the continuation of : Sources of factual information. Means, published in this treatise.

Readers may also wish to consult reference [4] in this treatise by the same author.