Categories (or catalogues) are systems for setting hierarchical order of articles and advertisements. It is implemented in the similar way to the one of organizing web pages as it is described in previous section. Categories are displayed by “box_categories” template.

Data input and data edit fields are used in similar way. Description will be displayed if it is defined in the specified category template. Field “Type”, if left blank, would mark current category as news carrier category. Otherwise, this field can be set as “ads” for carrying advertisement messages, “business” for carrying business advertisements or “products” for carrying messages about the certain product. One category can be set up to carry only one type of content/messages. Usually, default template is used for design and display of all categories, but it is also possible to copy or modify disp_category template and use it for display of certain categories. Specific picture could be attached to differentiate every category. It is possible to choose between system available pictures (icons) or to import external.