Zamfir, FlorinMealha, ÓscarSantos, Beatriz SousaNunes, JoséChambel, Teresa and Nunes, Nuno and Romao, Teresa and Creissac Campos, José2021-11-032021-11-032021978-3-03868-167-0https://doi.org/10.2312/pt.20061545https://diglib.eg.org:443/handle/10.2312/pt20061545This paper presents the theoretical basis of a web log based management system used for research purposes. The main focus is related with information attributes and operator definitions used for information visualization analysis and manipulation. Web sites and portals are becoming complex organic systems difficult to monitor usage patterns and control navigational and structural problems. In many day to day routines, severe inefficient and ineffective situations are ignored or understood a little too late. The system mentioned in this paper represents a research framework with the goal of solving information and communication management problems in a web site/portal, using an information visualization approach, with direct manipulation adjustment and problem identification mechanisms. Although the specific contribution of this paper is theoretical, some system usage screenshots were added to clarify the purpose of some attributes, definitions and operators.information visualizationinformation and communication managementweb logs10.2312/pt.20061545147-156