Figure 2.

A simplified representation of the Atlas database. Structures are described in tables Tbloc, Tentity and datatype. The contents of the articles are stored in Tables Block, Entity, Images and so forth. DataType contains a list of data types that are used to create an article, such as text, images, links and so forth. The data are stored in a specific table for each type. Tentity describes the entities that make up a block. TBloc describes the structuring topic and sub-topic articles. The articles are classified into different categories (leukaemia, gene and so forth), each class having its own section structure. To create a new category of articles, the publishing tool will search for any structure that must be implemented by querying the database metadata (TBloc, TEntite, DataType).