Aline Elis Arboit - Universidade do Estado de São Paulo, Brazil Maria Cláudia Cabrini Gracio - Universidade do Estado de São Paulo, Brazil Ely Francina Tannuri de Oliveira - Universidade do Estado de São Paulo, Brazil Leilah Santiago Bufrem - Universidade do Estado de São Paulo, Brazil The Relationship between Authors and Main Thematic Categories in the Field of Knowledge Organization: A Bibliometric Approach Abstract This is a study about the relationships between authors and the main thematic categories in the papers published in the last five International ISKO Conferences, held between 2002 and 2010. The aim is to map the domain as ISKO conferences are considered the most representative forum in the field. The published papers are considered to indicate the relationships between authors and themes. The Classification Scheme for Knowledge OrganizationError! Bookmark not defined. Literature (CSKOL) was used to categorize the papers. The theoretical and methodological foundations of the study can be found in the concept of domain analysis proposed by Hjørland. The analysis of the papers (n=146) led to the identification of the most productive authors, the networks representing the relationships between the authors as also the categories that constitute the primary areas of research. Introduction Considering knowledge organization ( KO) as a domain, for which the continuous construction of a consistent epistemological statute is necessary, this research seeks to identify the main areas of thought and research in the domain. This is done based on the papers presented in the international conferences of the ISKO so as to establish relationships between researchers and the themes. The research also aims at identifying the more productive authors in KO based on papers in ISKO international conferences, as well as examining the themes these researchers focus on. It also aims at identifying the themes that were of greater interest in the last five editions of the event, held between 2002 and 2010. The choice of papers in ISKO International conference volumes for domain analysis was based on the assumption that these are representative of the research in the domain. As such an examination of the papers should contribute to an understanding of the real and present composition of the domain. Knowledge Organization: A Bibliometric Analysis The domain of KO has for its foundation the philosophical framework of Dahlberg‟s concept theory (1993), the author considered to be the pioneer in the field of studies related to KO. She is also mainly responsible for forming ISKO. The construction of classificatory and thesauri systems have been structured based on this conception, which demonstrates that the concepts theory is widely accepted in the area. It can therefore be said that Dahlberg‟s theory plays an important role in the process of cognitive institutionalization of the discipline. Based on the concepts theory, Dahlberg (1993) has developed Classification Scheme for Knowledge Organization Literature (CSKOL) at ISKO, which groups the main concepts under ten primary categories: C0 Form Divisions; C1 Theoretical Foundations and General Problems; C2 Classification Systems and Thesauri (CS&T): Structure and Construction; C3 Methodology of Classing and Indexing; C4 On Universal Classification Systems and