Introduction. This thesis is set in the field of critical knowledge organization and indigenous knowledge organi- zation. Building on the theory of domain analysis I chose the Saami Library in Sweden as the domain for this thesis. The purpose was to identify the structures of power affecting how the lives and experiences of the Saami people are represented in the library catalogue and in the classification systems used, and to examine the views on knowledge expressed in the classification systems. Theory and method. This thesis builds upon the writings on deconstruction. I seek to deconstruct the cata- logue and the classification system using tools derived from the writings of Jacques Derrida. Analysis. Nine posts from the catalogue, and the classification codes entered there were analysed. Emphasis was put on analysing the DDC classification as this is the primary classification system used. Results. From analysing the classifications and the catalogue posts I found that the representations of the Saami experiences varied depending on which subject class the book belonged to. A majority of the posts analysed were classified as social sciences in DDC whereas the classifications were more varied in the Swedish SAB- system. Conclusion. Two structures have been identified. The first structure places the Saami experiences as some- thing that is other, in relation to which the mainstream is defined. The second structure places the Saami experi- ences as part of a diversity, separate from the unity of the mainstream society. This structure only acknowledges the existence of diversity if this means that the position of the unity is strengthened. Concerning the second purpose of the thesis I find that a western knowledge perspective has got a hegemonic position in the DDC, which means that other knowledge systems such as indigenous knowledge is not seen as such but as something only related to a specific group. This is a two years master’s thesis in Library and Information Science.