The paper concerns the analysis of the data included in the
Rough Set Database System
(called in short the RSDS system). The data is analyzed by means of statistical and graph-theoretical methods. The results of the analysis show interesting relations among the authors of publications whose descriptions are included in the system. The results may be useful for determining the structure of research groups related to the rough sets, the scientific interests of the members of those groups, mutual collaboration between groups, as well as for identifying the trends appearing in research.